The 24th International Workshop on Neutrinos From Accelerators (NuFact 2023)

20 Aug 2023, 07:30 → 26 Aug 2023, 21:20 Asia/Seoul

Natural Science Lecture Center (building-28), Seoul National University, Korea

Jonghee Yoo (Seoul National University), Kyungkwang Joo (Chonnam National University)

NuFACT 2023: The 24th International Workshop on Neutrinos from Accelerators (http://nufact2023.snu.ac.kr)

Note: The workshop is fully offline, the venue of the workshop is the Natural Science Lecture Center (building 28, see the map here) in Seoul National University.
Timetable posted. Please check your schedule and also check whether you can upload your slides.

You can see a general introduction for the NuFACT23 period in the welcome slide. (here)

NuFACT 2023 is the 24th in the series of yearly international workshops which started in 1999 and which had previously been called the International Workshop on Neutrino Factories. The change of name to International Workshop on Neutrinos from Accelerators is related to the fact that the workshop program has, over the years, come to include all current and future accelerator and also reactor-based neutrino projects, including also muon projects, not only the Neutrino Factory project.

The main goal of the workshop is to review the progress of current and future facilities able to improve on measurements of the properties of neutral and charged lepton flavor violation, as well as search for new phenomena beyond the capabilities of presently planned experiments. The workshop is both interdisciplinary and interregional in that experimenters, theorists, and accelerator physicists from all over the world share expertise with the common goal of reviewing the results of currently operating experiments and designing the next generation of experiments. 

The NuFACT 2023 workshop is divided into seven Working Groups covering the following topics:

WG 1: Neutrino Oscillation Physics
WG 2: Neutrino Scattering Physics
WG 3: Accelerator Physics
WG 4: Muon Physics
WG 5: Neutrinos Beyond PMNS
WG 6: Detectors 
WG 7: Inclusion, Diversity, Equity, Education, and Outreach

Important Date
Due for REGULAR registration fee payment: 10 August, 2023
Due for LATE registration fee payment: 18 August, 2023
Due for ONSITE registration fee payment: 26 August, 2023

NuFACT23photo.jpg

NuFact23-Welcome.pdf

SNUKyujanggakNuFACT23.pdf

snumap.pdf

Sunday 20 August

ESSnuSB+ mini workshop: (room#103)

1 Introduction to the ESSnuSB+ mini Workshop

Speaker: Tamer Tolba

WS_Introduction.pdf

WS_Introduction.pptx

2 Introduction to the physics and experimental aspects of the project

Speaker: Dr Marcos Dracos (Centre National de la Recherche Scientifique (FR))

Dracos_NuFact2023_WS.pdf

Dracos_NuFact2023_WS.pptx

3 Neutrino-Nucleus cross section modeling at the low energy regime: Theoretical overview

Speaker: Natalie Yvonne Jachowicz (Ghent University (BE))

essnusbjachowicz.pdf

4 The status of the design studies on the special ESSnuSB+ target station

Speaker: Tamer Tolba

WP3_ESSvSB_NuFact2023.pdf

WP3_ESSvSB_NuFact2023.pptx

15:25 Coffee Break

ESSnuSB+ mini workshop: (room#103)

5 The design of the LEnuSTORM racetrack ring

Speaker: Natalia Milas (European Spallation Source)

NuFact2023_WP4.pdf

NuFact2023_WP4.pptx

6 Status of LEMNB facility design

Speakers: Andrea Longhin (CEA Saclay), Andrea Longhin (Universita e INFN, Padova (IT)), andrea longhin (INFN)

LEMNB_WP6_NuFact2023_v2.pdf

7 The design of the new near detector and the physics reach of the project

Speakers: Georgios Fanourakis (Nat. Cent. for Sci. Res. Demokritos (GR)), Kaare Endrup Iversen (Lund University (SE))

Gfan-NuFact2023.pdf

Gfan-NuFact2023.pptx

NuFACT2023_KIversen.pdf

Monday 21 August

08:30 Registration (in front of administrative office on the 1st floor)

Plenary: Plenary A (room#101, relay broadcasting at room#102)

Convener: Un Ki Yang (Seoul National University (KR))

8 Welcome

Speaker: Jaejun Yu

9 Introduction

Speaker: Kyung Kwang Joo (Department of Physics-Chonnam National University-Unknown)

10 Keynote 1 Neutrino Experiments

Speaker: Chang Kee Jung (Stony Brook University (US))

1. NuFACT23_Jung.pdf

11 Keynote 2 Neutrino Theory

Speaker: Eung Jin Chun

230821_NuTheory_NuFact.pdf

10:10 Coffee Break

Plenary: Plenary B : introduction (room#101, relay broadcasting at room#102)

Convener: Siyeon Kim

12 WG1 introduction : Oscillation

Speaker: Prof. Jian Tang (Sun Yat-Sen University(CN))

20230821_WG1_overview_NuFact2023_by_SYSU_JianTang.pdf

13 WG2 introduction : Scattering

Speaker: Dr Elena Gramellini (University of Manchester)

NuFact_2023 (1).pdf

14 WG3 introduction : Accelerator

Speakers: Megan Friend (High Energy Accelerator Research Organization (JP)), Megan Friend (KEK)

WG3_introduction_NuFACT23_mfriend.pdf

15 WG4 introduction : Muon

Speakers: Yuki Fujii, Yuki Fujii (Monash University (AU))

NuFact2023WG4Intro.pdf

16 WG5 introduction : beyond PMNS

Speaker: Julia Harz

NuFact_Intro_2023.pdf

17 WG6 introduction : Detector

Speaker: Yasuhiro NISHIMURA (Keio University)

20230821_NUFACT2023WG6intro_Nishimura.pdf

18 WG7 introduction : IDEEO

Speaker: Nagisa Hiroshima (University of Toyama)

IDEEO_introduction.pdf

19 LOC: introduction to the lunch place, reception, schedule etc

Speaker: Un Ki Yang (Seoul National University (KR))

NuFact23-Welcome.pdf

12:00 Lunch (rakgujung, B1F, building#38, SNU)

Plenary: Plenary 1 : WG1, WG2 (room#101, relay broadcasting at room#102)

Convener: Kyung Kwang Joo (Department of Physics-Chonnam National University-Unknown)

20 Oscillation theory and future

Speaker: Dr Rebekah PESTES (APC/IPGP)

Oscillation Theory and Future Experiments.pdf

21 Cross sections for future experiments

Speaker: Laura Munteanu (CERN)

Munteanu_NuFACT2023_xsecPlenary.pdf

22 Overview of Reactor neutrinos

Speaker: Juan Pedro Ochoa Ricoux

ReactorNeutrinos_Ochoa_NuFact23.pdf

23 Modeling neutrino-nucleus cross section: theory and generators

Speaker: Natalie Yvonne Jachowicz (Ghent University (BE))

nufact23jachowicz.pdf

15:35 Coffee Break

Plenary: Plenary 2 : WG5, WG6 (room#101, relay broadcasting at room#102)

Convener: Prof. Chang Hyon Ha (Chung-Ang University)

24 Latest results from the KATRIN experiment

Speaker: Anthony Onillon (Technical University of Munich, 85747 Garching, Germany)

NuFACT2023_KATRIN_ONILLON.pdf

25 Constraints on new physics in (Nu)SMEFT

Speaker: Michael Schmidt (UNSW Sydney)

NuFact2023_MichaelSchmidt-final.pdf

26 New results on LHC neutrinos from the FASER experiment

Speaker: Tomoko Ariga (Kyushu University (JP))

20230821_tariga_FASER_results_NuFACT.pdf

27 Heavy neutrino search at LHC

Speaker: John Leslie Almond (Seoul National University (KR))

NuFact2023_JohnAlmond_ApprovedVersion4.pdf

28 Neutrino experiments in Yemilab, Korea

Speaker: Prof. Yeongduk Kim (Institute for Basic Science (IBS), South Korea)

nufact2023-ydkim.pdf

18:30 Reception (1st floor & 2nd floor)

Tuesday 22 August

Plenary: Plenary 3 : WG2, WG5 (room#101, relay broadcasting at room#102)

Convener: koun choi (IBS)

29 0vbb experiments summary

Speaker: Matteo Agostini

202308-0vbb-nufact.pdf

30 Mapping viable parameter space for leptogenesis

Speaker: Juraj Klaric (Universite Catholique de Louvain (UCLouvain))

Klaric_NuFACT23

31 Overview of cross section experimental results: argon based technologies

Speakers: Sophie Berkman (University of British Columbia), Sophie Berkman

sberkman_nufact2023.pdf

32 Overview of cross section experimental results: non-argon based technologies

Speaker: Raquel Castillo Fernandez (University of Texas at Arlington)

castillo-xsec-nufact23.pdf

33 Determination of the Argon spectral function from (e,e'p) data

I will outline the conceptual framework supporting the interpretation of the 40Ar(e,e'p) cross sections--recently measured at Jefferson Lab by the E12-14-012 Collaboration---in terms of the spectral functions describing the energy and momentum distribution of protons in the target nucleus. The key underlying assumptions and their validity in the kinematical setup of the Jefferson Lab experiment will be discussed, and the results of the analysis will be illustrated highlighting their relevance for ongoing and
future neutrino oscillation programs.

Speaker: Prof. Omar Benhar (INFN and Sapienza University)

abstract.txt

obenhar_NuFact23.pdf

10:35 Coffee Break

Plenary: Plenary 4 : WG3, WG4 (room#101, relay broadcasting at room#102)

Convener: Moses Chung

34 Beam power upgrade status and plan at J-PARC

Speaker: Takeshi Nakadaira (High Energy Accelerator Research Organization (JP))

Nufact2023-beamupgrade-wt.pdf

Nufact2023-beamupgrade-wt-wobak.pdf

35 Proton beam upgrade plan at Fermilab

Speaker: Dr Jeffrey Eldred (Fermilab)

Eldred_NuFACT_Plenary.pdf

Eldred_NuFACT_Plenary.pptx

36 Status of beam commissioning at ESS

Speaker: Andreas Jansson (Unknown)

nufact23 andreas jansson.pdf

nufact23 andreas jansson.pptx

37 New suggestion from China for the new muon beam-ling building plan

Speaker: Nikolaos Vassilopoulos

nufact23-plenary-nikolaos.pdf

nufact23-plenary-nikolaos.pptx

12:40 Lunch (duremidam, 5F, building#75-1, SNU)

parallel (room#101): #1 - WG1

Convener: Daniel Cherdack

38 Neutrino Mass Ordering using Atmospheric Neutrino Oscillations with IceCube DeepCore

Neutrino Mass Ordering (NMO) studies explore the unresolved fundamental question of whether the neutrino masses follow a normal ordering (m3>m2>m1) or an inverted ordering (m2>m1>m3). IceCube is an ice-Cherenkov neutrino detector deployed about 1.5 kilometers below the surface of the South Pole. Using DeepCore, a more densely instrumented volume of ice near the bottom of the detector, we study the ordering by a measurement of the oscillation patterns of a 9.28-year sample of atmospheric neutrinos. The main goals of this work include analyzing the NMO at higher neutrino energies relative to Super-Kamiokande and long-baseline experiments as well as observing neutrino-Earth matter effects, both of which will play a distinctive role in NMO global fit studies. Another goal includes preparing for a measurement of the ordering using the superior IceCube Upgrade instrumentation, a fully-funded extension of DeepCore that is estimated to be deployed in the 2025-2026 Antarctic summer.

Speaker: MARIA PRADO RODRIGUEZ (University of Wisconsin-Madison)

nufact2023_flercnn_nmo.pdf

39 Atmospheric neutrino oscillations in JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose experiment currently under construction in southern China. It consists of a 20 kton liquid scintillator detector, whose main physics goal is to determine the neutrino mass ordering (NMO). While its main sensitivity is from reactor neutrino oscillations in vacuum, atmospheric neutrino oscillations in JUNO, via matter effects, can potentially provide an independent sensitivity to NMO, and increase JUNO’s total sensitivity in a combined analysis. This talk reports the recent progress made by JUNO towards this goal, including the reconstruction of atmospheric neutrino's energy and directionality, flavor and neutrino/anti-neutrino identification, and background rejection. A preliminary discussion on sensitivity is also presented.

Speaker: Hongyue Duyang (Shandong University)

slides_duyang_23-08-22.pdf

40 KM3NeT/ORCA: Updates of neutrino oscillation measurement

The KM3NeT collaboration is building two neutrino detectors in the Mediterranean Sea. The KM3NeT/ORCA detector has been optimized for the detection of atmospheric neutrinos with energies between few GeV and 100 GeV. Among the primary goals are the measurement of the neutrino oscillation parameters and the determination of the neturno mass ordering. A correct interpretation of the measurements requires the understanding of the different sources of systematic uncertainties. This talk addresses the uncertainties associated to neutrino interaction models, which are encoded in the so-called neutrino MC generators. In particular, the differences between GENIE, the neutrino generator used by KM3NeT and the GiBUU generator are explored at the level of systematic uncertainties and their impact on sensitivity estimates. In this contribution an overview of the recent updated results from KM3NeT/ORCA and the neutrino generator environment for Monte-Carlo simulations in KM3NeT will be presented.

Speaker: Johannes Schumann

JSchumann_NuFACT23_ORCA_Overview.pdf

41 Status of the RENO experiment

The RENO experiment has precisely measured the amplitude and frequency of reactor antineutrino oscillation at Hanbit Nuclear Power Plant since Aug. 2011. The 2018 publication reported the measured oscillation parameters based on 2200 days of data. After that, additional 1600 days of data has been acquired with one or two operating reactors, which yields relatively lower antineutrino flux. This presentation reports the current status and analyses which has been performed.

Speaker: Dr Sanghoon Jeon (Seoul National University)

nufact23.pdf

parallel (room#102): #1 - WG2

Convener: Dr Raul Gonzalez Jimenez (Complutense University of Madrid)

42 MK Single Pion Production

I would like to present my recent work at the NuFact workshop in Seoul. https://journals.aps.org/prc/abstract/10.1103/PhysRevC.107.025502

I have developed a single pion production model in neutrino-nucleon interaction:
https://inspirehep.net/literature/1634864 .
Then I used electron scattering data to extract the nucleon form factors:
https://inspirehep.net/literature/1802724 ,
In the recent paper, I extended the model to the transition region between resonance and Deep Inelastic regions (high momentum transfer, Q^2, and hadron invariant mass, W) which is extremely important for neutrino oscillation experiments such as DUNE.

Speaker: Dr Minoo Kabirnezhad (Imperial College London)

Minoo_nufact.pdf

43 Multinucleon knock-out in neutrino-nucleus scattering

The precise measurement of neutrino properties is among the highest priorities in fundamental particle physics. Accelerator-based neutrino experiments provide a unique framework for such studies, providing oscillation measurements and hints of the CP violation in the leptonic sector. However, since these experiments rely on the interaction of neutrinos with bound nucleons inside atomic nuclei, understanding the hadronic and nuclear physics of these interactions constitutes a challenging source of uncertainty. Modeling neutrino-nucleus scattering processes is a complex many-body problem, traditionally performed in the independent-particle picture, focusing on the quasielastic neutrino-nucleon interactions or the excitation of nucleon resonances. Improving our knowledge of such cross sections to the required percent levels involves conducting research beyond the first approximation, incorporating the effects of nucleon correlations and multinucleon knock-out processes.
The presented research involves a novel, multidirectional approach to tackling these problems by combining the theoretical experiences of the Ghent group and the Monte Carlo neutrino event generator NuWro. The nuclear physics of Ghent involves a non-relativistic, mean-field-based model for both the initial and final hadronic states. On top of that, we add dynamically generated short-range nucleon correlations and explicit two-body dynamics with meson-exchange currents involving isobar degrees of freedom. This framework, exhaustively compared against electron scattering, provides predictions of inclusive, semi-inclusive, and exclusive cross sections for neutrino-nucleus interactions leading to 1-particle-1-hole and 2-particle-2-hole final states. Together with auxiliary advancements in other aspects of Monte Carlo simulations, we will present the implementation of the obtained two-nucleon knock-out model in NuWro and compare it to experimental neutrino data, therefore completing the bridge between the theoretical and experimental sides of accelerator-based neutrino research.

Speaker: Kajetan Niewczas

niewczas_230822.pdf

44 Modeling quasielastic and pion production on the nucleus

I will discuss some nuclear effects affecting neutrino-nucleus cross sections at energies of interest for neutrino-oscillation experiments. Pauli blocking, binding energies, effects beyond the impulse approximation, and final state interactions are investigated, with focus on the differences between a quantum mechanical approach and the models and methodology found within Monte Carlo neutrino event generators. The results I will presennt are mainly based on our recent works: PRL 123, 052501 (2019); PRC 100, 045501 (2019); PRC 105, 025502 (2022); PRC 105, 054603 (2022); Phys. Rev. D 106, 113005 (2022); arxiv:2203.09996; arxiv:2304.01916; and some ongoing projects.

Speaker: Dr Raul Gonzalez Jimenez (Complutense University of Madrid)

NuFact23_RGJ_v2.pdf

45 Two-Nucleon Emission in Quasielastic Neutrino and Electron Scattering induced by short-range correlations

Mirar en ficheros adjuntos.

Speaker: Paloma Rodríguez Casalé

abstract.pdf

prc.pdf

46 Implementation of CRPA in GENIE and comparisons of 1p1h models

Building on Phys. Rev. D 106, 073001 (2022), we present the implementation and validation of the Hartree-Fock continuum random phase approximation (HF-CRPA) model in the GENIE neutrino-nucleus interaction event generator and a comparison of the subsequent predictions to experimental measurements of lepton kinematics from interactions with no mesons in the final state. These predictions are also compared to those of other models available in GENIE. It is shown that, with respect to these models, HF-CRPA predicts a significantly different evolution of the cross section when moving between different interaction targets, when considering incoming anti-neutrinos compared to neutrinos and when changing neutrino energies. These differences are most apparent for interactions with low energy and momentum transfer. It is also clear that the impact of nucleon correlations within the HF-CRPA framework is very different than in GENIE's standard implementation of RPA corrections. Since many neutrino oscillation experiments rely on their input model to extrapolate between targets, flavours, and neutrino energies, the newly implemented HF-CRPA model provides a useful means to verify that such differences between models are appropriately covered in oscillation analysis systematic error budgets.

Speaker: Dr Stephen Dolan (CERN)

SDolanCRPAinGENIE.pdf

47 Revisiting target mass corrections in lepton-nucleus deeply inelastic scattering

In this talk we revisit so-called target mass corrections (TMCs) to nuclear structure functions in lepton-nucleus deeply inelastic scattering (DIS), which account for the fact that the masses of nuclei are not guaranteed to be small compared to momentum transfers in DIS. We present several findings, including: (i) that nuclear parton distribution functions can be expressed directly in terms of partonic degrees of freedom in the OPE (the intermediate picture of "bound nucleons" is not necessary); (ii) that nuclear TMCs can be expressed in a way that is universal for all nuclei and readily implemented in numerical codes; (iii) the numerical impact in DIS cross sections.

Speaker: Richard Ruiz (Institute of Nuclear Physics (IFJ) PAN)

rruiz_NuFact23_nTMCs.pdf

parallel (room#103): #1 - WG3

Convener: Natalia Milas (European Spallation Source)

48 First commissioning data from the upgraded T2K beamline

The J-PARC accelerator, serving the long-baseline neutrino oscillation program in Japan, is engaged in a long-term effort to increase the proton beam power from 500kW to 750kW during T2K data-taking, and ultimately more than 1.3 MW for Hyper-Kamiokande.

The T2K beamline underwent major upgrades in view of the increased beam power, and a successful first run was performed in April 2023.
T2K is instrumented with a series of proton beam monitors upstream of the production target, as well as a muon monitor downstream of the decay volume, which measures muons coming from the hadron decays producing neutrinos.

It also has the INGRID on-axis near detector, which monitors the direction and position of the neutrino beam. These detectors can be used together to ensure the correct alignment and the correct operation of the components in the upgraded T2K beamline.

Results of the first commissioning run of the upgraded T2K beamline using these beam monitoring detectors will be presented.

Speaker: Yukine Sato (Tokyo University of Science)

nufact_202308_YukineSato_final.pdf

49 The T2K optical transition radiation proton beam monitor: updates and future plans

For fixed-target experiments, final proton beam monitoring is key to controlling the properties of the particle flux exiting the target. The T2K experiment makes use of an Optical Transition Radiation (OTR) monitor for this purpose. In support of the J-PARC 750kW beam power upgrade, this monitor has undergone a series of changes targeted at increasing its tolerance to the higher beam intensity and repetition rate. The design and performance of these upgrades, including redesigned titanium foils in the beam path and a new DAQ system, will be discussed with reference to data collected during the recent T2K run 12 period. Finally, a new apparatus to investigate the beam-induced background light contribution is described. This intends to make use of an optical fiber and a PMT in order to better understand the time dependence of the beam-induced background light seen in the OTR data.

Speaker: Charlie Naseby

OTR_NuFACT_talk.pdf

50 Uniform beam simulation technique for NuMI beam scans and ML studies at Fermilab

Fermilab's neutrino facilities, including NuMI and the upcoming LBNF, use proton beams to produce positively and negatively charged pions and kaons. Detailed simulations are necessary to study particle interactions and beam propagation. To efficiently analyze beam scan effects, we propose a method for generating multiple simulation samples with high statistics. By simulating a single sample with a uniform distribution for each beam parameter, simulation time and computing resources can be significantly reduced. We calculate Gaussian weights and apply them to post-processing measurements. The alignment of the primary proton beam, target, and focusing horn has a significant impact on the neutrino energy spectrum, and changes in beam parameters can be estimated by scanning the proton beam across the target. Muon monitors detect and respond to these changes, and comparing beam scan data with simulations establishes a correlation between the two. This combined approach also offers valuable beam diagnostics. Our simulation technique allows users to generate as many random beam simulations as needed for beam scan studies and can be applied to a wide range of machine learning algorithms.

Speaker: Katsuya Yonehara

UniformBeamStudy_NuFact2023.pdf

UniformBeamStudy_NuFact2023.pptx

51 Advanced Material Development for Next Generation Accelerators

Beam-intercepting devices face challenges of beam-induced thermal shock and radiation damage effects. Efficient cooling systems are needed to remove heat as beam power increases. Development of novel materials capable of sustaining increased beam power and intensity is crucial for future multi-MW target facilities. In this talk, several promising novel materials will be discussed, including High Entropy Alloys (HEAs), Nanofibers, SiC-SiC composites, and Toughened Fine-Grained Recrystallized (TFGR) tungsten. These materials offer potential solutions for the challenges faced by next-generation accelerator facilities. HEAs, for instance, demonstrate enhanced radiation tolerance compared to conventional alloys, making them valuable for high-energy physics (HEP) applications. Nanofibers, known for their thermal shock and radiation damage tolerance, are being investigated as target materials, with their numerous grain boundaries and free surfaces acting as sinks to irradiation-induced defects. Initial studies show promising potential for nanofibers in future target materials. Another material known as SiC-SiC composite is being explored as an alternative to graphite in proton beam target applications. SiC-SiC composites exhibit superior oxidation resistance compared to graphite, reducing the need for extensive oxidation prevention measures. Preliminary findings suggest that SiC-SiC composites offer promising potential for improved performance and simplified maintenance in high-power accelerator facilities. TFGR (Toughened Fine-Grained Recrystallized) tungsten is being investigated as a next-generation target material due to its potential to offer 10 times higher muon/neutron brightness compared to current materials. Although tungsten has inherent brittleness at low temperatures, this challenge can be overcome through the application of various metallurgical techniques. The exploration of TFGR tungsten presents an opportunity to enhance the performance and efficiency of muon/neutron generation while addressing the brittleness issue associated with tungsten. In conclusion, the exploration of novel materials such as High Entropy Alloys, Nanofibers, SiC-SiC composites, and TFGR tungsten offers promising solutions for the challenges faced by beam-intercepting devices. Further research and development in these areas are essential to enhance the performance and reliability of next-generation accelerator facilities.

Speaker: Gaurav Arora (Postdoc Research Associate)

NuFACT_novel_material_23.pdf

52 High-Power Targetry R&D for Next-Generation Accelerator Facilities

As next-generation accelerator target facilities, for Neutrino Program such as the Long-Baseline Neutrino Facility (LBNF) or Muon Program such as Mu2e-II at Fermilab, become increasingly more powerful and intense, high power target systems face key technical challenges. Beam-intercepting devices such as beam windows and secondary particle-production targets are continuously bombarded by high-energy high-intensity pulsed proton beams to produce secondary particles for several High Energy Physics (HEP) experiments. Energy deposition from the primary beam induces near instantaneous heating (thermal shock) and microstructural changes (radiation damage) in the beam-intercepting materials. Both thermal shock and radiation damage ultimately degrade the performance and lifetime of targets and have been identified as the leading cross-cutting challenges of high-power target facilities. Several facilities have already had to limit their beam power because of the survivability of their targets and windows, rather than as a limitation of the accelerators themselves. As beam power in next-generation multi-megawatt accelerator target facilities continue to increase, there is a pressing need to address the material challenges to avoid limiting the scope of future HEP experiments.
After presenting the high power Targetry challenges facing next generation accelerators, I will highlight the most recent activities within the framework of RaDIATE collaboration and the critical materials R&D needs to address the challenges of multi-MW targets.

Speaker: Gaurav Arora (Postdoc Research Associate)

NuFACT-2023-final_1.pdf

parallel (room#301): #1 - WG4

Convener: Yuki Fujii

53 Searching for physics beyond the Standard model with the MEG II experiment at PSI

The MEG experiment at Paul Scherrer Institut (Zurich – Switzerland) established in 2016 the best current upper limit of $4.2 \times 10^{-13}$ on the branching ratio of the $\mu->e \gamma$ decay. The search for this decay represents an extremely powerful tool to look for possible extensions of the Standard Model since its existence would unambiguously represent a sign of new physics.

To further enhance sensitivity by one order of magnitude, an upgraded apparatus (MEG II) was conceived and constructed in subsequent years.
Following an engineering run in 2020 with a reduced set of electronic channels, MEG II commenced physics data acquisition in the summer of 2021 and is currently in operation. An overview of the sub-detectors' performances and of the analysis status will be presented. MEG II aims to continue data taking until 2026, striving to achieve its ultimate goal.

This talk will further highlight the status and perspectives of MEG II searches for other exotic phenomena, including the exploration of a potential 17.6 MeV particle originating from the $^7Li(p,γ)^7Be$ reaction.

Speaker: Alessandro Massimo Baldini (Universita & INFN Pisa (IT))

MEG II status and perspectives.pdf

54 Status of Mu3e Phase 1

The Mu3e experiment will search for the charged lepton flavour violating decay $\mu \rightarrow e^+ e^- e^+$ and is based at the Paul Scherrer Institute (PSI). It aims to achieve a sensitivity of one in $\mathcal{O}(10^{15})$ moun decays in phase 1 and one in $10^{16}$ muon decays in phase 2, which is four orders of magnitude more sensitive than the previous measurement conducted by the SINDRUM experiment. Any observation of this decay would be a clear sign for new physics, since it is highly suppressed in the Standard Model to a branching ratio of below $\mathcal{O}(10^{-54})$.

The Mu3e detector will use four layers of thin Mupix sensors (high voltage monolithic active pixel sensors, HV-MAPS) to track electrons and positrons. A time resolution of O(100ps) will be provided by scintillating tile and fibre detectors, which are coupled to SiPMs and read out by the Mutrig chip. A FPGA-based, triggerless DAQ system will collect data from these detectors, which will then be reconstructed in a GPU filter farm.

With Mupix11 and Mutrig3 the sensor developement for phase 1 has concluded and the collaboration has performed engineering runs with a fist prototype of the inner detector region in order to validate a variety of systems and to identify potential issues. With the experience gained from the engineering runs the collaboration is now in the process of constructing the phase 1 detector.

The talk will present the design of the detecor and readout system and discuss the ongoing activities for Mu3e phase 1.

Speaker: Martin Müller (JGU Mainz)

NuFact2023_Mu3e.pdf

55 The Mu2e Experiment at Fermilab

The Muon-to-Electron-Conversion (Mu2e) Experiment is a high-precision, intensity-frontier experiment being developed at Fermilab which will search for coherent, neutrino-less muon to electron conversion in the presence of an atomic nucleus. Such a process would exhibit charged lepton flavor violation (CLFV), which has not yet been observed. Continuing the search for CLFV, Mu2e will improve the sensitivity by four orders of magnitude over the present limits. In the search for beyond the standard model (BSM) physics, Mu2e is uniquely sensitive to a wide range of models by indirectly probing mass scales up to the energy scale of 10^4 TeV. While muon-to-electron-conversion is permissible in an extension of the standard model through neutrino oscillations, the rate is extremely low at about one event in 10^52. By design, the background for the experiment will be well-understood and kept at a sub-event level, which will mean the observation of muon-to-electron conversion is a direct confirmation of BSM physics. The physics motivation, the design, and the current status of the experiment will be presented.

Speaker: Steven Boi

The_Mu2e_Experiment_NuFact2023.pdf

The_Mu2e_Experiment_NuFact2023.pdf

The_Mu2e_Experiment_NuFact2023.pptx

56 COMET Muon conversion experiment at J-PARC

COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of a nucleus ($μ^− + N \to e^− + N$); a lepton flavor violating process. Recent progresses in facility and detector development are presented, aiming for the experimental sensitivity of the order of $10^{−15}$ for Phase-I and $10^{−17}$ or beyond for Phase-II experiment. A schedule and preparation status to start the Phase-I experiment in 2025 will be discussed.

Speaker: MyeongJae Lee

NUFACT2023-MJLee-COMET.pdf

parallel (room#302): #1 - WG5

Convener: Sophie Berkman

57 Status of the Short-Baseline Near Detector at Fermilab

The Short-Baseline Near Detector (SBND) will be one of three Liquid Argon Time Projection Chamber (LArTPC) neutrino detectors positioned along the axis of the Booster Neutrino Beam (BNB) at Fermilab, as part of the Short-Baseline Neutrino (SBN) Program. The detector is anticipated to begin operation later this year. SBND is characterized by superb imaging capabilities and will record over a million neutrino interactions per year. Thanks to its unique combination of measurement resolution and statistics, SBND will carry out a rich program of neutrino interaction measurements and novel searches for physics beyond the Standard Model (BSM). It will enable the potential of the overall SBN sterile neutrino program by performing a precise characterization of the unoscillated event rate, and constraining BNB flux and neutrino-argon cross-section systematic uncertainties. In this talk, the physics reach, current status, and future prospects of SBND are discussed.

Speaker: Diana Patricia Mendez Mendez (Brookhaven National Laboratory)

sbnd_nufact2023_dianamendez.pdf

58 Sterile Neutrino Search at MicroBooNE using both the BNB and NuMI Beams

The MicroBooNE experiment employs an 85-ton active volume liquid argon time projection chamber to detect neutrinos from both the on-axis Booster Neutrino Beam (BNB) and off-axis Neutrinos at the Main Injector (NuMI) beam. This work investigates short baseline neutrino oscillations in a 3+1 sterile neutrino model and compares our results to previous anomalies found in experiments such as LSND, Neutrino-4, and gallium anomalies. To achieve our goal, we utilize high-performance charged current electron neutrino and muon neutrino selections. In this presentation, we will detail our initial results on this sterile neutrino search from MicroBooNE using the BNB beam. Additionally, we will examine the impact of a degeneracy resulting from the cancellation of $\nu_e$ appearance and disappearance, and demonstrate that combining data from the BNB and NuMI beams, which have substantially different $\nu_e/\nu_\mu$ ratios, can break this degeneracy.

Speaker: Meghna Bhattacharya (Fermilab)

NuFact_SterileNeutrinos (1).pdf

59 MicroBooNE's Search for Anomalous Single-Photon Production

The MicroBooNE experiment is an 85-ton active volume liquid argon time projection chamber (LArTPC) neutrino detector situated in the Fermilab Booster Neutrino Beam (BNB). Leveraging the unique capabilities of the LArTPC technology to distinguish photons from electron electromagnetic showers, MicroBooNE has achieved the world's most sensitive search for neutrino-induced single-photon production. In this talk, we will present a comprehensive overview of these results, as well as recent advancements in our search for single-photons as an explanation for the MiniBooNE Low Energy Excess. These include a more model-independent approach utilizing inclusive photon searches, as well as a targeted search for NC coherent-like single-photon production. Moreover, we will introduce a new direction of focused searches aimed at exploring "Beyond the Standard Model" scenarios, which involves investigating exotic e+e- pair production that could be attributed to neutrinos acting as a portal to a potential "Dark Sector" of new physics.

Speaker: Lee Hagaman (University of Chicago)

uboone_photon_NuFACT_2023.pdf

60 Recent Developments Regarding the MiniBooNE Anomaly

The 4.8$\sigma$ low-energy excess (LEE) of electron-like events observed by MiniBooNE is one of the longest-standing anomalies in particle physics. As the MiniBooNE reconstruction relied on the identification of Cherenkov rings, the excess could come from extra electrons or photons in the detector. This talk covers new developments regarding each hypothesis. The MicroBooNE experiment has recently constrained the level to which excess $\nu_e$ interactions from the Booster Neutrino Beam can explain the LEE. We show that the MicroBooNE constraints are significantly alleviated if the LEE comes from $\overline{\nu}_e$ rather than $\nu_e$ interactions. This effect is due to a difference in the low-energy suppression of $\overline{\nu}_e$ and $\nu_e$ cross sections in carbon v.s. argon. Next, we discuss a model comprised of an eV-scale sterile neutrino and a heavy neutral lepton $\mathcal{N}$ with a transition magnetic moment coupling to active neutrinos, also known as a "neutrissimo". It is shown that the visible decay $\mathcal{N} \to \nu \gamma$ can explain the bulk of the energy and angular distributions of the LEE. New constraints on the neutrissimo model are also derived from MINER$\nu$A neutrino electron elastic scattering measurements. While they do not currently rule out the MiniBooNE solution, a dedicated MINER$\nu$A analysis would likely be sensitive to the MiniBooNE-preferred region of neutrissimo parameter space.

Speaker: Nicholas Kamp

NuFACT2023_NoTransitions.pdf

61 Status of ICARUS at the Fermilab Short-Baseline Neutrino Program

ICARUS is a liquid argon time projection chamber (LArTPC) neutrino detector situated at the intersection of two neutrino beams at Fermilab. As part of the Short-Baseline Neutrino (SBN) program, it will search for neutrino oscillations in the Booster Neutrino Beam (BNB). The search will test past anomalous results in neutrino physics such as the LSND, MiniBooNE, and reactor anomalies which could be explained by the existence of a sterile neutrino. Beyond oscillation physics, ICARUS will also perform measurements of neutrino cross sections and search for Beyond Standard Model (BSM) physics with the Neutrinos at the Main Injector (NuMI) beam. ICARUS has been installed at Fermilab since 2020 and began its physics data taking in June 2022. In this presentation, preliminary technical results and detector physics measurements from ICARUS data with the BNB and NuMI beams are presented. Progress on the program of ICARUS oscillation, cross section, and BSM physics is shown. These results demonstrate the capability of ICARUS to select and reconstruct neutrino events. The preliminary detector physics measurements also have relevance for the larger program of LArTPC neutrino physics experiments.

Speaker: Gray Putnam

ICARUS NuFACT 2023.pdf

parallel (room#303): #1 - WG6

Convener: Michael Wilking

62 The DUNE Near Detector Suite

DUNE will be a next-generation experiment aiming to provide precision measurements of the neutrino oscillation parameters. It will detect neutrinos generated in the LBNF beamline at Fermilab, using a Near Detector (ND) situated near the beam target where the neutrinos originate and a Far Detector (FD) located 1300 km away in South Dakota. A comparison of the spectra of neutrinos measured at the FD and the ND will allow for the extraction of oscillation probabilities from which the oscillation parameters can be inferred. The specific role of the ND will be to serve as the experiment’s control: it will establish the no oscillation null hypothesis, measure and monitor the beam, constrain systematic uncertainties, and provide essential measurements of the neutrino interactions to improve models. The ND complex will include three primary detector components: a liquid argon TPC called ND-LAr, a high-pressure gas TPC called ND-GAr and an on-axis beam monitor called SAND. The three detectors will serve important individual and overlapping functions, with ND-LAr and ND-GAr also able to move transverse to the beam’s axis via the DUNE-PRISM program. The overall design of the ND and its physics goals will be discussed in this talk.

Speaker: Andrew Furmanski (University of Minnesota (US))

NuFact_NearDetector_2023.pdf

63 ProtoDUNE-SP's performance, physics status, and future plans

The ProtoDUNE-SP detector is a single-phase liquid argon time projection chamber measuring 7.2 × 6.1 × 7.0 $m^3$ in active volume. It is designed as a test bed and full-scale prototype for the elements of the first far detector module of the Deep Underground Neutrino Experiment (DUNE). Located at the CERN Neutrino Platform, the detector was exposed to a tagged and momentum-analyzed particle beam with momentum settings ranging from 0.3 GeV/c to 7 GeV/c and collected more than four million beam events. Additionally, the detector operated for approximately two years, continuously collecting cosmic ray events. We present the performance of the detector which has met or surpassed the specifications set for the DUNE far detector. The status of physics analyses including hadron-Ar cross sections and measurements of liquid argon properties will be summarized. Talk will conclude with plans for the coming Run2 with ProtoDUNE-HD (horizontal drift).

Speaker: Sungbin Oh (Fermilab (US))

ProtoDUNE_status_wide_final.pdf

64 DUNE Vertical Drift LArTPC design

The Deep Underground Neutrino Experiment (DUNE) is a long-baseline neutrino-oscillation experiment aiming at measuring CP-violating phase and neutrino mass ordering. The far detector consists of four 17-kt modules based on Liquid Argon Time Projection Chamber (LArTPC) technology.

The recently proposed Vertical Drift (VD) concept has been selected as the design of the second module. This concept uses a novel perforated-PCB anode design, which considerably simplifies the TPC construction compared to the standard wired-based anodes with similar calorimetry and tracking efficiencies.

A VD-prototype, so-called Module-0, is currently under final assembly at the CERN Neutrino Platform and is foreseen to take cosmic and beam data early 2024. The Module-0 is equipped with four anode planes, or Charge-Readout Plane (CRP), which have all been operated in a dedicated full-scale cryostat with cosmic data over the past year.

This talk will introduce the LArTPC Vertical Drift concept and present the performance results from the CRP full-scale data campaign. The status and the preparation work for the upcoming Module-0 data will be discussed, such as the plans towards the second DUNE far detector module.

Speaker: Laura Amelie Zambelli (Centre National de la Recherche Scientifique (FR))

lzambell_nufact23_protodunevd.pdf

16:00 Coffee Break

parallel (room#101): #2 - WG3x4

Convener: Prof. Yoshi Uchida (Imperial College London)

65 High purity and high brightness muon beam for next generation muon-electron conversion experiments

The search for muon-electron conversion processes that violate the conservation of charged lepton flavors has attracted much attention for its superior sensitivity to the discovery and verification of new physical phenomena beyond the Standard Model. Two experiments, COMET and Mu2e, are currently underway in Japan and the United States to search for muon electron conversion processes with O(10^-17) single-event experimental sensitivity. The Mu2e-II experiment, which improves the experimental sensitivity by a factor of 10, is also under investigation.
What should be done next as a muon-electron conversion process depends on the results of these experiments. In the case that the muon electron conversion process is not found, further exploratory experiments with increased experimental sensitivity are needed. If the muon-electron conversion process is discovered, the dependence of the decay ratio on the muon stopping target material should be investigated to clarify the physical mechanism causing this process. In either case, the next generation experiments should not only increase the muon beam intensity, but also improve its purity and energy spread.
Therefore, we have proposed the PRISM project, in which phase-space rotation is performed in a muon storage ring. In this talk, I will explain the key points and outline of the PRISM project and discuss the possibility of future muon-electron conversion experiments.

Speaker: Dr Akira Sato (Osaka University)

230822_PRISM.pdf

66 Update on the Targetry and Beamlines of MELODY

Since the approval of MELODY in early 2023, the collection of surface muons and pions and the relevant beamlines have been revised.
In this report, we would like to present our latest studies at MELODY: i) For the target station, a) the optimization in terms of yields and material of the rotated target that is currently preferred and combined with the new sideways collection of both muons and (for the future) pions at an angle of 90 deg. and 270 deg. respectively, with respect to the primary protons, b) the cooling and maintenance scenarios, and c) the radiation shielding studies. ii) For the beamlines, the revised layout and optimization of the surface muon beamline including the beam monitoring studies. The decay muon beamline, foreseen as a future upgrade, will also be discussed.

Speaker: Nikolaos Vassilopoulos

MELODY-nikolaos-nufact23-wg3.pdf

MELODY-nikolaos-nufact23-wg3.pptx

67 High - Intensity Muon Beams (HIMB) project or how to improve the most intense continuous muon source in the world

Currently PSI delivers the most intense continuous muon beam in the world with up to a few 10^8 μ+/s. The High Intensity Muon Beam (HiMB) project aims at developing a new target station and muon beam lines able to deliver 10^10 μ+/s, with a huge impact for low-energy, high-precision muon experiments.

While the next generation of proton drivers with beam powers in excess of the current limit of 1.4 MW still requires significant research and development, the focus of HiMB is to improve the surface muon yield with a new target geometry and to increase capture and transmission with a solenoid-based beamline in order reach a total efficiency of approximately 10%.
We present the current status of the HiMB project.

Speaker: Giovanni Dal Maso

NuFact___2023_08.pdf

68 Status of the ultra-slow muon beamline at J-PARC MUSE

The ultra-slow muon (USM) beamline at J-PARC MLF MUSE provides a low-energy muon beam through laser ionization of thermal muonium in a vacuum. When a muon beam irradiates a hot tungsten foil at 2000 K, muonium atoms are emitted with an energy of 0.2 eV. The atoms can be ionized by two synchronized laser beams with wavelengths of 122 nm and 355 nm [1]. Low-energy muons with adjustable energies are valuable for materials science of surface and interface. Furthermore, USM is essential for applications requiring low-emittance muons, such as the muon g-2/EDM experiment at J-PARC [2] and transmission muon microscope [3]. The facility consists of an intense surface muon beamline, muonium production target, ionization laser, and transport optics. The commissioning of the USM beamline is in progress and has achieved sufficient beam specifications for muon spin spectroscopy with thin film samples [4]. In this contribution, we will report on an overview of the facility, its present status, and the results obtained from recent commissioning.

[1] K. Nagamine et al., Phys. Rev. Lett. 74, 4811 (1995).
[2] M. Abe et al., PTEP 053C02 (2019).
[3] Y. Miyake et al., Microscopy 67, i3 (2018).
[4] S. Kanda et al., J. Phys. Conf. Ser. 2462, 012030 (2023).

Speaker: Dr Sohtaro Kanda

USM-20230822-NuFact2023.pdf

69 Progress in design of a muon source for muon to electron conversion based on an FFA ring - PRISM

Future muon to electron conversion experiments require an improvement in sensitivity by a factor of 100 and novel accelerator concepts are necessary to achieve this goal.
A Fixed-Field Alternating gradient (FFA) ring has been proposed to create a Phase Rotated Intense Source of Muons (PRISM), which will allow for a significant purification of the muon beam and suppression of a typically large momentum spread by the use of RF phase rotation. This will provide a reduction of the backgrounds and increase the number of stopped muons in the target. The experimental system based on PRISM-like concept is of interest to be used at J-PARC or in proposed Advanced Muon Facility (AMF) at Fermilab. The challenge of PRISM lays in the necessity to efficiently transport the beam with very large emittance and momentum spread and the use of an FFA is essential to meet this requirement.
An example FFA ring design and its subsystems are presented and their
accelerator physics performance is evaluated.

Speaker: Jaroslaw Pasternak

PRISM_JPasternak_nufact23.pdf

parallel (room#102): #2 - WG1x2

Conveners: Chris Marshall (University of Rochester), Dr Raul Gonzalez Jimenez (Complutense University of Madrid)

70 An Overview of Neutrino-Nucleus Interactions Physics: Status and Path Forward

Current and future accelerator-based neutrino facilities utilizing intense neutrino beams and advanced neutrino detectors are focused on precisely determining neutrino oscillation properties and signals of weakly interacting Beyond the Standard Model (BSM) physics. These are subtle effects, such as extracting the CP violation phase and disentangling parameter degeneracies between oscillation effects and BSM physics, and require an unprecedented level of precision in measurements. The potential of achieving discovery-level precision and fully exploring the physics capabilities of these experiments relies greatly on the precision with which the fundamental underlying neutrino nucleus interaction processes are known. This talk will focus on neutrinos from tens of MeV to a few GeV energies. At these energies, neutrino interactions are a non-trivial multi-scale, multi-process problem that lies in an uncharted territory that spans from low-energy nuclear physics to perturbative QCD with no known underlying unified physics. In this talk, I will present an overview of the field, discuss these challenges, highlight recent progress, and attempt to outline a path forward.

Speaker: Dr Vishvas Pandey (Fermi National Accelerator Laboratory)

NuFACT2023_VPandey.pdf

71 Impact of the near detector on the T2K oscillation analysis

T2K is a long baseline neutrino experiment which exploits a neutrino and antineutrino beam at J-PARC to perform precision measurements of atmospheric parameters $\Delta m^{2}_{32}$, $\sin^2(\theta_{23})$ and to search for CP-violation. The main systematic uncertainties limiting the precision will be described, as well as, the role of the near detector to constrain such systematic uncertainties.

The most challenging of such systematic uncertainties is related with the modelling of few-GeV neutrino-nucleus interactions. In particular, in the latest oscillation analysis, new samples with proton and photon tagging at the near detector have been implemented to improve the control and tuning of such uncertainties. To attack this problem, the T2K experiment is also engaged in a continuous effort to implement up-to-date theoretical models in T2K’s Monte-Carlo event generator (NEUT) and to define a suitable parametrisation of the model’s uncertainties as an input for neutrino oscillation analyses.

The new uncertainty model, developed for the latest T2K oscillation measurement, will be presented, as well as a comparison of the model to available global lepton- and hadron-scattering data.

Speaker: Tristan Doyle

Impact_of_the_near_detector_on_the_T2K_oscillation_analysis.pdf

72 Cross-Section Modeling on the NOvA Experiment

Neutrino interaction cross sections are a significant source of uncertainty for many experiments dependent on the determination of neutrino properties from the inference of neutrino flavor or energy. To mitigate the effect of these large uncertainties on results from NOvA Experiment, a long-baseline experiment currently operating at Fermilab, the collaboration undergoes a critical evaluation of available cross-section models and implements the most appropriate models in simulation. In the process of model evaluation, a tune of GENIE simulation customized to the NOvA experiemnt is produced, along with a robust treatment of the appropriate systematics. This talk will review the relevant details of 3-flavor oscillations analyses on NOvA, the MEC tune that NOvA has developed for these analyses, and the status of model evaluation for future NOvA measurements.

Speaker: Bryan Ramson (Fermilab)

XSecNuFact23.pdf

73 Measurement of the Nucleon Axial Form Factor from Antineutrino Proton Elastic Scattering at MINERvA

The transition axial form factor of the nucleon is a probe of nucleon structure and important for accurate prediction of charged current elastic and quasielastic scattering. Using the hydrogen in its hydrocarbon target, the MINERvA experiment has extracted a sample of antineutrino proton elastic scattering events, and directly extracted the form factor in a technique analogous to that used for the first measurements of the electromagnetic nucleon form factors in the 1950s. The results are compared to other theoretical predictions and derived measurements of the axial form factor.

Speakers: Kevin McFarland (University of Rochester), Kevin McFarland

MINERvA Hydrogen NuFact August 2023.pdf

74 Benchmarking neutrino interaction models with NUISANCE

A precise modelling of neutrino-nucleus interactions is of fundamental importance to allow current and future accelerator-based neutrino oscillation experiments to achieve their ambitious goals. However, as it stands, no neutrino interaction model currently implemented in event generators has been shown to offer a quantitatively satisfactory agreement with many (and in some cases, any) modern cross-section measurements. But exactly how bad is the agreement? Which regions of kinematic phase space look better or worse? Does the situation improve when fitting uncertainties within the models? The answer to all these questions can be provided by NUISANCE.

NUISANCE is a widely used tool to synthesise the predictions from all major event generators and to confront them with state-of-the-art cross section measurements. It has been used extensively by the T2K, MINERvA and MicroBooNE collaborations to compare models to measurements and to determine uncertainty parameterisations for neutrino oscillation analyses. NUISANCE is also used by theory groups to compare microscopic models to event generator predictions. In this talk, we first summarise the status and functionalities of NUISANCE, before discussing a number of recent analyses conducted within it. These include an evaluation of the robustness of the “low-nu” method [arXiv:2203.11821], a benchmarking of the T2K CCQE uncertainty model against cross-section measurements [arXiv:2202.03219] and comparisons of recent CCQE theory calculations (CRPA and RMF) to event generator predictions [arXiv:2207.02086, arXiv:2110.14601].

Speakers: Dr Luke Pickering (Royal Holloway, University of London), Dr Stephen Dolan (CERN)

SDolanNUISANCE.pdf

parallel (room#103): no session

75 no session

parallel (room#301): no session

76 no session

parallel (room#302): #2 - WG5

Convener: Julia Harz

77 The CUPID neutrinoless double-beta decay experiment

Neutrinoless double-beta decay (0νββ) is a key process to address some of the major outstanding issues in particle physics, such as the lepton number conservation and the Majorana nature of the neutrino. Several efforts have taken place in the last decades in order to reach higher and higher sensitivity on its half-life. The next-generation of experiments aims at covering the Inverted-Ordering region of the neutrino mass spectrum, with sensitivities on the half-lives greater than 1E27 years. Among the exploited techniques, low-temperature calorimetry has proved to be a very promising one, and will keep its leading role in the future thanks to the CUPID experiment. CUPID (CUORE Upgrade with Particle IDentification) will search for the neutrinoless double-beta decay of 100Mo and will exploit the existing cryogenic infrastructure as well as the gained experience of CUORE, at the Laboratori Nazionali del Gran Sasso in Italy. Thanks to 1596 scintillating Li2MoO4 crystals, enriched in 100Mo, coupled to 1710 light detectors CUPID will have simultaneous readout of heat and light that will allow for particle identification, and thus a powerful alpha background rejection. Numerous studies and R&D projects are currently ongoing in a coordinated effort aimed at finalizing the design of the CUPID detector and at assessing its performance and physics reach.
In our talk, we will present the current status of CUPID and outline the forthcoming steps towards the construction of the experiment.

Speaker: Beatriz Oregui

CUPID-NuFACT.pdf

78 Overview of physics results with coherent elastic neutrino-nucleus scattering data

Co-authors: M. Atzori Corona, N.Cargioli, F. Dordei, C. Giunti, Y.F. Li, C.A. Ternes, Y.Y. Zhang

The detection of Coherent Elastic Neutrino-Nucleus Scattering (CEvNS) performed in 2017 and 2021 with cesium iodide and in 2020 with liquid argon by the COHERENT collaboration has paved the way for precision phenomenological measurements of many diverse physical phenomena.
CEνNS is a neutral current process induced by the exchange of a Z boson that permits putting interesting constraints on nuclear physics, beyond the standard model (SM) neutrino electromagnetic properties but it also represents a sensitive probe for non-standard interactions (NSI) that are not included in the SM, induced by yet to be discovered neutral vector and scalar bosons.
Recently, CEνNS has also been observed for the first time using antineutrinos from reactors at the Dresden-II site with a germanium detector called NCC-1701, allowing to obtain more stringent and complementary constraints.

In this talk, I will present a summary of the physics reach of CEνNS, presenting, in particular, the state-of-the-art constraints on neutrino charge radii, milli-charges, and magnetic moments [1] (putting emphasis on the role of elastic neutrino electron scattering in Dark Matter experiments like LZ and XENONnT [2]) as well as new limits on different new physics models involving light vector Z' mediators [3]. The complementarity of CEνNS constraints with nuclear physics with the recent PREX and CREX neutron-skin determinations will also be discussed [4], highlighting the interplay with the weak-mixing angle determination [5].

Finally, I will provide prospects for the future, given the large amount of CEνNS experiments that are currently being proposed or under construction [5].

[1] M. Corona et al. JHEP 09 (2022) 164, Arxiv: 2205.09484
[2] M. Corona et al. Phys. Rev. D 107 (2023) 5, 053001, Arxiv: 2207.05036
[3] M. Corona et al. JHEP 05 (2022) 109, Arxiv: 2202.11002
[4] M. Corona et al. Phys. Rev. C 105 (2022) 5, 055503, Arxiv:2112.09717
[5] M. Corona et al. Arxiv:2303.09360 (2023)

Speaker: Matteo Cadeddu

Overview_of_physics_results_with_CEvNS_data_Cadeddu_M.pdf

79 Light mesons from light heavy neutrinos at the LHC

In the context of the Phenomenological Type I Seesaw, we investigate the LHC's sensitivity to exclusive, mesonic decay modes of long-lived, light (Dirac and Majorana) heavy neutrinos $N$ when they are produced in the decays of $W^\pm$ bosons. We present a new framework that combines massless QCD to describe $N$'s production up to NLO in QCD via weak bosons with a low-energy effective field theory to describe $N$'s decays to mesons. We provide a prescription for fast, numerical determination of $N$'s partial and total widths for any mass and accounts for mesonic decay modes.

Speaker: Richard Ruiz (Institute of Nuclear Physics (IFJ) PAN)

rruiz_NuFact23_HeavyNMeson.pdf

80 Prompt neutrinos at the LHC and connections to the prompt atmospheric neutrino flux

The Large Hadron Collider (LHC) can produce huge numbers of neutrinos into the large rapidity region. New experiments at the LHC, the ongoing FASER\nu and SND@LHC and the proposed Forward Physics Facility (FPF) experiments aim to detect such neutrinos, in particular prompt neutrinos which mainly come from charm hadron decays. Prompt neutrinos can be also produced by cosmic ray interactions in the atmosphere which become the main component of the atmospheric neutrino flux at very high energies. Prompt atmospheric neutrinos have not yet been detected and theoretical predictions have large uncertainties, mainly related to charm hadron production. The study of charm production through measurements of prompt neutrinos at the LHC with high statistics will help estimations of the prompt atmospheric neutrino flux. We will present the kinematic regions for prompt neutrinos that can be detected in far-forward neutrino experiments. We discuss the relevance to the prompt atmospheric neutrino flux using collider kinematic variables, the collision energy \sqrt{s} and the center-of-mass rapidity y of the charm hadrons and neutrinos.

Speaker: Yu Seon Jeong (Chung-Ang University (KOR))

NuFact_YSJeong.pdf

81 Probing the reactor neutrino flux below the IBD threshold with CEνNS

Most antineutrinos produced in a nuclear reactor have energies below the inverse beta decay (IBD) threshold, and have not yet been detected. We show that a coherent elastic neutrino-nucleus scattering (CEvNS) experiment with an ultra-low energy threshold like NUCLEUS can measure the flux of reactor neutrinos below the IBD threshold. Using a regularized unfolding procedure, we find that a meaningful upper bound can be placed on the low energy flux with CEvNS. However, it is difficult to establish the existence of the neutron capture component.

Speaker: Jiajun Liao

Liao_nufact_2023.pdf

parallel (room#303): #2 - WG6

Convener: Yasuhiro NISHIMURA (Keio University)

82 Tests and assembly of the T2K near detector upgrade

The near detector of T2K (ND280) is undergoing a major upgrade. A new scintillator tracker, named superFGD, with fine granularity and 3D-reconstruction capabilities has been assembled at JPARC. The new Time Projection Chambers are under development, based on the innovative resistive Micromegas technology and a field cage made of extremely thin composite walls. New scintillator panels with precise timing capability have been built to allow precise Time of Flight measurements.

The detector is currently in assembly phase following a detailed effort of characterization during detector production. The results of multiple tests of the detectors with charged beams, neutron beam, cosmics and X-rays will be presented. Among these results, we could mention the first measurement of neutron cross-section with the superFGD and the first detailed characterization of the charge spreading in resistive Micromegas detectors.

Thanks to such innovative technologies, the upgrade of ND280 will open a new way to look at neutrino interactions: sensitivity results and prospects of physics capabilities will be also shown.

Speaker: Dung Thi Nguyen (Hanoi University of Science)

T2K_ND280Upgrade_Nufact23_DNguyen_WG6.pdf

83 Neutron detection with a 3D-projection scintillator tracker and its application to neutrino oscillation experiments

Neutrino oscillation experiments require accurate measurements of the neutrino energy. However, the kinematic detection of final-state neutrons in neutrino interactions is currently absent in these experiments. A revolutionary 3-Diensional projection scintillator tracker (3DST) is capable of detecting both the kinetic energy and direction of neutrons on an event-by-event basis with precision through Time-of-Flight technique. This presentation will demonstrate the constraint of DUNE antineutrino flux uncertainty, illustrating the application of neutron kinematic detection, under the assumption that the 3DST is placed at the DUNE ND SAND.

Speaker: SunWoo Gwon

Nufact2023_sunwoo_gwon.pdf

84 3-inch PMTs and electronics system in JUNO

25600 3-inch PMTs (SPMTs) were designed in the JUNO detector together with 20012 20-inch PMTs (LPMTs). The SPMT system can enhance the detector’s performances such as calibrating charge nonlinearity of LPMTs and thus improving the energy resolution. Signals of SPMTs are read out by the frontend electronics contained in 200 underwater boxes through 1600 customized multichannel connectors. All of SPMTs and electronics have been produced, integrated and tested. 5% of them have been installed in the 700-m underground JUNO detector and verified with a dedicated light-off test. In this talk, we will report the design of the SPMT system, mass production and performances of SPMTs and electronics, as well as the latest progress of SPMT installation and commissioning.

Speaker: Ziliang Chu (The Institute of High Energy Physics of the Chinese Academy of Sciences)

Ziliang_NuFact23.pdf

85 Multi-Calorimetry in Light-based Neutrino Detectors

Neutrino detectors are amongst the largest ever built photonics systems, where the neutrino detection is inexorably linked to the challenging detection of scarce photons. The tremendous progresses in neutrino physics over past several decades are inseparable from the evolution of the detector photonics interfaces to yield ever higher precision and richer detection information. The measurement of the energy of neutrinos, referred to as calorimetry, is required today to be controlled to the per-mille level precision, thus leading to further innovation in specialized photonics. In this talk, a novel design, with the publication to be released soon, is presented that detectors can be endowed with multiple photonics interfaces for simultaneous multiple light detection to yield high-precision calorimetry. This multi-calorimetry approach opens the novel notion of dual calorimetry detectors as an evolution from the single calorimetry setups used for most experiments so far. The dual calorimetry design exploits unique response synergies, including correlations and cancellations, to yield the unprecedented mitigation of today’s dominant response systematic effects. The dual calorimetry design has been adopted by JUNO experiment and could shed light on the design of future neutrino detectors.

Speaker: Yang HAN

Multi-calorimetry_in_light_based_neutrino_detector_Yang_HAN.pdf

86 Performance and Testing of the JUNO 20-inch PMTs

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector scheduled to come online in 2024. The scintillator volume is observed by approximately 17 000 large 20” PMTs and 25 000 small 3” PMTs. The performance of the PMTs is essential to reach the scientific goals, especially for oscillation physics. I will review the system of the large PMTs. Prior to installation, the PMTs have gone through intensive tests. I will describe the tests and the performance expected from the tests.

Speaker: Achim Stahl (Rheinisch Westfaelische Tech. Hoch. (DE))

Stahl-JUNO-LPMT-V02.pdf

Stahl-JUNO-LPMT-V02.pptx

Wednesday 23 August

Plenary: Plenary 5 : WG4. WG6 (room#101, relay broadcasting at room#102)

Convener: MyeongJae Lee

87 Muon g-2 and other precision measurements

Speaker: Matteo Sorbara (Istituto Nazionale di Fisica Nucleare - Sezione Roma Tor Vergata)

MS_230823_gm2NuFACT23.pdf

88 Muon CLFV and g-2 theories

Speaker: Dr Innes Bigaran (Fermilab and Northwestern University)

Nufact2023.pdf

89 Muon CLFV experiments

Speaker: Satoshi Mihara

NuFact2023-SatoshiMihara.pdf

NuFact2023-SatoshiMihara.pptx

90 Detection of neutrons in accelerator neutrino interactions

Speaker: Tristan Doyle

Neutron_Detection_in_Accelerator_Neutrino_Interactions.pdf

91 PRISM technique: challenges in infrastructure and analysis

Speakers: Michael Joseph Wilking, Michael Wilking (TRIUMF), Prof. Michael Wilking (Stony Brook University)

Wilking_PRISM_NuFact.pdf

10:35 Coffee Break

Plenary: Plenary 6 : WG7 (room#101, relay broadcasting at room#102)

Convener: Francesca Dordei (INFN, Cagliari (IT))

92 Activities of Women Committee in Korean Physical Society

The Women Committee (WCiKPS) in Korean Physical Society has been established in April 2002, just after the 1st IUPAP international conference on Women in Physics held in Paris, in March 2002 aiming for spreading women’s science culture to increase employment and promotion of women physicists and to improve research and work environments women friendly. The number of female physicists in KPS was 238 (9.3%) in 2002, and has been increasing steadily, now reaching 922 (15.5%) in 2020.
The WCiKPS has carried out various activities for achieving its goals: the Female Graduate Student Awards for fostering female workforce, Physics Camps for high school girls and Site Visits for college students to guide young students, Special Sessions in KPS meetings, National/International Workshops for WIP to expand basic competencies in science and technology through the exchange of physics information and knowledge on networking, career development, and leadership training of female physicists, and Surveys to improve the status of female physicists and advocating for their rights / Proposing the Government policies for female physicists. These activities are explained in detail in the following sections.

Speaker: Haein YIM

2023 NuFACT23_WIP.pdf

93 Public Communication

Speakers: Shota Takahashi (KEK), Shota Takahashi (Conseil Europeen Recherche Nucl. (CERN)-Unknown-Unknown)

2_20230823_nufact2023_ideeo_shota_takahashi.pdf

94 Invisible Workers in Science

Why do we remember some scientists while forgetting others who participated in the same scientific work? Moving away from prominent scientists and focusing on the invisible workers can highlight the role of gender, race, and class in scientific knowledge-making. Using Mount Wilson Observatory at the turn of the twentieth century as an example, I point out how scientists in positions of power, such as observatory directors, enforced gender division among the scientists. Through examples in modern science, I point out how taking into account the contribution made by these forgotten scientists can enrich our understanding of science and provide insights into creating a more equitable environment.

Speaker: Eun-Joo Ahn (University of California Santa Barbara)

eahn-invisibleworkers-nufact23.pdf

95 Diversity and outreach in research

Speaker: MIA,ROBIN,BYRON WEST

nufact-finalv2.pdf

Poster: poster introduction talk

Convener: Francesca Dordei (INFN, Cagliari (IT))

96 poster introduction

Speaker: Francesca Dordei (INFN, Cagliari (IT))

poster.pdf

97 Nuclear Dependence of Antineutrino Deep Inelastic Scattering in two dimensions at MINERvA

MINERvA (Main Injector Neutrino ExpeRiment to study $\nu$-A interactions) is a dedicated (anti)neutrino-nucleus experiment in the few GeV energy region which has used the high-intensity NuMI beamline facility at the Fermi National Accelerator Laboratory.
The experiment was performed using several nuclear targets, Iron, Carbon, Lead, Water and Hydrocarbon to study the nuclear medium effects in the low $(\sim 3 GeV)$ and intermediate $(\sim 6 GeV)$ energy region. The idea is to understand the nuclear medium effects by taking the ratio of cross section like $\frac{\sigma_i}{\sigma_{CH}}$ and $\frac{d\sigma_i}{d\sigma_{CH}}$ where i = C, Fe, Pb, etc. We shall present the current progress on the two dimensional (2D) charge current antineutrino Deep Inelastic Scattering (DIS) analysis using medium energy $\bar\nu_\mu$ beam. The event selection is based on a set of different selection cuts and the DIS signal is defined as the events which contribute in the kinematical region defined by $Q^2 > 1 GeV^2$ and W $> 2 GeV$. We will discuss the different steps involved in the analysis. This study will give insight to both weak hadron physics and in the understanding of the nuclear medium effects in antineutrino nucleus interaction.

Speaker: Sayeed Akhter (Aligarh Muslim University)

NuFact_Poster_Sayeed.pdf

98 Constraining Lorentz Invariance Violation with Future Long-Baseline Experiments

Unified theories such as string theory and loop quantum gravity allow the Lorentz Invariance Violation (LIV) at the Planck Scale ($M_P \sim 10^{19}$ GeV). Using an effective field theory, this effect can be observed at low energies in terms of new interactions with a strength of $\sim 1/M_P$. These new interactions contain operators with LIV coefficients which can be CPT-violating or CPT-conserving. In this work, we study in detail how these LIV parameters modify the transition probabilities in the next-generation long-baseline experiments, DUNE and Hyper-K. We evaluate the sensitivities of these experiments in isolation and combination to constrain the off-diagonal CPT-violating ($a_{e\mu}$, $a_{e\tau}$, $a_{\mu\tau}$) and CPT-conserving ($c_{e\mu}$, $c_{e\tau}$, $c_{\mu\tau}$) LIV parameters. We derive approximate compact analytical expressions of appearance ($\nu_{\mu}\to\nu_e$) and disappearance ($\nu_{\mu}\to\nu_\mu$) probabilities in the presence of these LIV parameters to explain our numerical results. We explore the possible correlations and degeneracies between these LIV parameters and the most uncertain 3$\nu$ oscillation parameters, namely, $\theta_{23}$ and $\delta_{\rm CP}$. We find that for non-maximal values of $\theta_{23}$ ($\theta_{23}\neq45^\circ$), there exist degenerate solutions in its opposite octant for standalone DUNE and Hyper-K. These degeneracies disappear when we combine the data from DUNE and Hyper-K. In case of no-show, we place the expected upper bounds on these CPT-violating and CPT-conserving LIV parameters at 95\% C.L. using the standalone DUNE, Hyper-K, and their combination. We observe that due to its access to a longer baseline and multi-GeV neutrinos, DUNE has a better reach in probing all these LIV parameters as compared to Hyper-K. Since the terms containing the CPT-conserving LIV parameters are proportional to neutrino energy in oscillation probabilities, Hyper-K is almost insensitive to the CPT-conserving LIV parameters because it mostly deals with sub-GeV neutrinos.

Speakers: Pragyanprasu Swain (Institute of Physics, Bhubaneswar, India), Mr Sudipta Das (Institute of Physics, Bhubaneswar, India & HBNI, Mumbai, India)

Pragyanprasu-LIV-LBL-NuFact-2023-poster.pdf

12:34 Finger Food Lunch

Poster: (1st floor)

KYUJANGGAK Tour: The Veritable Records of the Joseon Dynasty: KYUJANGGAK tour: The Veritable Records of the Joseon Dynasty

SNUKyujanggakNuFACT23.pdf

15:30 Coffee Break

Plenary: Plenary 7 : WG1 (room#101, relay broadcasting at room#102)

Convener: Adam Aurisano (University of Cincinnati)

99 Status of T2K

Speaker: Daniel Cherdack

Cherdack_T2K_OA_NuFACT23_v5.pdf

100 Status of NovA

Speaker: Andrew Sutton

2023-08-23_Plenary_NOvAStaus_ASutton.pdf

101 Status of MicroBooNE

Speaker: Avinay Bhat (University of Chicago)

20230823.pdf

102 Overview of Atmospheric neutrinos

Speaker: Dr Alfonso Andres Garcia Soto (IFIC)

nufact.pdf

103 Overview of CEvNS Experiment

Speaker: Rex Tayloe

RTayloeCEvNS_NuFact23.pdf

104 ESSnuSB+ and summary of the mini workshop (satellite)

Speaker: Dr Marcos Dracos (Centre National de la Recherche Scientifique (FR))

Dracos_NuFact2023.pdf

Dracos_NuFact2023.pptx

Public Lecture: (Planetarium): Supernova, Blackhole, and Neutrinos (in Korean, 한국어 강연). Only 90 audiences with reservation

Convener: Siyeon Kim

105 (Planetarium): Supernova, Blackhole, and Neutrinos (in Korean, 한국어 강연). Only 90 audiences with reservation

Speaker: Seongchul Yoon

Thursday 24 August

Plenary: Plenary 8 : WG1 (room#101, relay broadcasting at room#102)

Convener: Jungsic Park (Kyungpook National University)

106 Korea Neutrino Observatory status

Speaker: Intae Yu (Sungkyunkwan University (KR))

KNO - NUFACT 2023 (20230824) v2.pdf

107 Overview of near detector technologies and status

Speaker: Dr Mark Patrick Hartz (TRIUMF & Kavli IPMU, University of Tokyo)

near_detectors_nufact2023.pdf

108 JUNO status

Speaker: Yang HAN

JUNO_Status&Prospects_for_NuFact2023_Yang_HAN.pdf

109 DUNE status

Speakers: Chris Marshall (University of Rochester), Christopher Marshall (University of Rochester (US))

DUNE_NuFACT23_ChrisMarshall.pdf

110 Hyper-K status

Speakers: Neil Kevin Mccauley (University of Liverpool (GB)), Neil McCauley, Neil McCauley (The University of Liverpool)

McCauley NuFact 2023.pdf

10:25 Coffee Break

Plenary: Plenary 9 : panel discussion (room#101, relay broadcasting at room#102)

Convener: Alain Blondel (Universite de Geneve (CH))

111 Panel Discussion on the prospect of future neutrino program

Moderator: Alain Blondel
Panel:
Mary Bishai (DUNE Spokesperson)
Masato Shiozawa (Hyper-K Spokesperson)

Speakers: Alain Blondel (Universite de Geneve (CH)), Mary Bishai (Brookhaven National Laboratory (US))

DUNE_Phase2_P5_NuFACT2023_MBishai.pdf.pdf

Google doc document for entry of your questions

round-table-discussion-intro-AB-2021-09-10.pdf

round-table-discussion-intro-AB-2021-09-10.pptx

112 LOC: Excursion and Banquet guide

113 LOC: Workshop photograph (SNU building-28)

12:30 Lunch box

13:00 Excursion

19:00 Banquet (Sesangui Modeun Achim)

Address : 24, Yeoui-daero, Yeongdeungpo-gu, Seoul
details in the link (http://nufact2023.snu.ac.kr/social/social.html)

Friday 25 August

parallel (room#101): #3 - WG1x3

Conveners: Kirsty Duffy (University of Oxford), Natalia Milas (European Spallation Source)

114 Experimental proof of principle of the Neutrino Tagging technique at NA62

The neutrino tagging technique proposes to instrument a neutrino beam line with silicon trackers to kinematically reconstruct properties of individual beam neutrinos produced in $\pi\to\mu\nu_\mu$, K$\to\mu\nu_\mu$ decays. As a result, the initial neutrino flux is precisely determined and the individual neutrino energy can be reconstructed with a resolution better than 1%. Moreover, based on time and angular coincidence, the neutrinos kinematically reconstructed by the trackers can be individually associated to the neutrinos interacting in the neutrino detector, such that the precise measurement of their properties can be used for physics analyses (e.g. oscillations, cross-section). A proof of principle of the method has been performed using the NA62 experiment at CERN as a miniature neutrino experiment: its intense kaon beam copiously produces neutrinos when decaying as K$\to\mu\nu_\mu$, its spectrometers act as tagger for the charged particles, and its electromagnetic calorimeter serves as neutrino detector. A trigger line was deployed in 2022 to collect events in which a neutrino interacted in the calorimeter. This contribution presents the analysis of the data collected in 2022. To avoid potential bias, the analysis was optimized in a phase space region free of neutrino interactions. In the complementary signal region, a fraction of an event is expected. This contribution will reveal the actual content of this signal region.

Speaker: Bianca De Martino (Centre National de la Recherche Scientifique (FR))

NuFACT_NuTagging_DeMartino.pdf

115 T2K flux prediction and tuning

T2K is a long baseline neutrino experiment which exploits a neutrino and antineutrino beam at J-PARC, which is produced by a proton beam impinging on a graphite target, a flux of pions and kaons are produced and neutrinos are produced by their disintegration.

A very detailed simulation of the beamline allows to predict the rate and energy of produced neutrinos, but still large uncertainties related with the nuclear models to describe the hadron interactions in the target affect such predictions. To improve the precision, the flux simulation is tuned using the results of a dedicated hadron production experiment at CERN: NA61/SHINE. Notably, T2K has obtained a major improvement in the flux uncertainties of the latest oscillation analysis by implementing the constraints coming from a new NA61/SHINE analysis of data taken with a replica of the T2K target. In parallel, the simulation of the material in the beamline has been further refined.

The impact of replica-target data, the improved simulation and the impact on the oscillation analysis will be described, together with prospects for further future improvements.

Speakers: Megan Friend (High Energy Accelerator Research Organization (JP)), Megan Friend (KEK)

T2K_flux_and_tuning_NuFACT2023_mfriend.pdf

116 Status of the Measurement of Neutrinos Elastically Scattering Off Electrons in the NOvA Near Detector

Neutrinos elastically scattering off atomic electrons is a purely leptonic
process whose cross section can be precisely calculated in the standard
model. A measurement of this process can provide an in-situ constraint
to the absolute neutrino flux in an accelerator-based $\nu_\mu$ beam. NOvA is
a long-baseline neutrino experiment optimized to observe the oscillation
of $\nu_\mu$ to $\nu_e$. It consists of a near detector located 1 km downstream of
the neutrino production target at Fermilab and a far detector located 810
km away in Ash River, Minnesota. This talk presents the status of the
neutrino-electron elastic scattering measurement using the NOvA near
detector, including strategies for selecting the signal, as well as the prospect
of reducing the flux uncertainty.

Speaker: Prof. Jianming Bian (University of California Irvine (US))

Nu-E Elastic Scattering NuFact23.pdf

117 Exploring the focusing mechanism of the horn magnets of the Fermilab main injector facility

Neutrinos at the Main Injector (NuMI) is a project at Fermilab that provides an intense beam of neutrinos used by a number of experiments. NuMI creates a beam of pions that decay into neutrinos, muons, and other particles. Muons are registered by the muon monitors. Magnetic horns are the key elements of the NuMI beam line. This work uses the muon beam profile observed at the muon monitors to study the NuMI horn focusing mechanism. It is found that the horn magnet generates dipole and quadrupole fields to focus pions. This suggests that the optics of the horn magnet are predominantly linear. Our study shows that the muon beam profile accurately detects the horn current within ±0.05%.

Speaker: Katsuya Yonehara

HornFocus08252023.pdf

HornFocus08252023.pptx

118 The NuMI Flux at ICARUS

ICARUS is a 430 t liquid argon time projection chamber, neutrino detector located at Fermi National Accelerator Laboratory and serves as the far detector for the Short Baseline Neutrino program. The ICARUS detector lies 795 m downstream and 5.7° above the Neutrinos at the Main Injector (NuMI) neutrino beam. At this large off-axis angle, ICARUS has a unique opportunity to measure a variety of electron and muon (anti-)neutrino interaction rates with argon nuclei, which will be an important input to the Deep Underground Neutrino Experiment. These measurements rely on detailed predictions of the (anti)neutrino fluxes and their related uncertainties to accurately extract the cross sections and estimate uncertainties. In many cases flux uncertainties can dominate the measurement error budget, and thus must be well understood and well characterized.
The authors will present the predictions for the NuMI flux at ICARUS along with corrections and estimated uncertainties. The uncertainties have two main sources: hadron production uncertainties, which are characterized using the Package to Predict the Flux (PPFX), and beamline uncertainties which are explored by alternate model configurations. Detailed breakdowns of the flux components by hadron production channel will be shown, as well as studies that elucidate how flux uncertainties evolve with large off-axis angles. Data products used for analyses, including covariances between various fluxes and PCA of the flux uncertainties will also be shown.

Speaker: Daniel Cherdack

Cherdack_ICARUS_NuMI_Flux_NuFACT23_v1.pdf

parallel (room#102): no session

119 no session

parallel (room#103): no session

120 no session

parallel (room#301): #3 - WG2

Convener: Christophe Bronner

121 Recent developments in GENIE

The international GENIE Collaboration maintains and develops an extensive software suite to meet the simulation needs of the broad neutrino community. GENIE develops a universal event generator simulating neutrino interactions from MeV to PeV energy scales, and a global analysis of neutrino scattering data used for model characterization, tuning and uncertainty evaluations. In recent years, there were significant advances towards a) the construction and characterisation of several alternative comprehensive neutrino interaction models in the GeV energy range, b) the tuning and evaluation of uncertainties for key modelling elements, c) the implementation of more rare neutrino scattering processes, d) the development of extensions for low and ultra high energy neutrinos, e) the validation and improvement of complementary electron scattering simulations, and f) the implementation within GENIE of BSM simulations, such as the simulation of dark neutrinos, boosted dark matter and heavy neutral leptons. This talk presents selected highlights from these ongoing developments.

Speaker: Prof. Costas Andreopoulos (University of Liverpool)

genie_nufact23_v2.pdf

122 The NEUT Generator: Status and Plans

The NEUT generator has a long, storied history. Originally written to predict neutrino induced backgrounds for the Kamioka Nucleon Decay Experiment (Kamiokande), it is now relied upon by T2K to simulate signal and background interactions for their oscillation and neutrino scattering cross section measurements. Looking to the future, the next-generation Hyper-Kamiokande experiment expects to rely on NEUT predictions for their flagship precision CP violation measurements.

This talk will introduce recent model development in NEUT in the context of comparisons to cross-section measurements. It will also discuss ongoing modernisation efforts for both HyperK and better compatibility with other tools that will be developed by the neutrino-scattering community in the build up to next-generation experiments and their modelling precision and tooling needs.

Speaker: Dr Luke Pickering (Royal Holloway, University of London)

NuFact2023_NEUT.pdf

123 First results from a relativistic mean field theory implemented in the NEUT neutrino interaction event generator

Neutrino oscillation experiments, such as the Tokai to Kamioka (T2K) experiment, are limited by their simulation of accurate neutrino-nucleus interactions. More in-depth theoretical knowledge of neutrino-nucleus interactions are paramount; however, implementing such knowledge in existing event generator frameworks is just as imperative. To evaluate neutrino-nucleus interactions a general framework for the relativistic nuclear many-body problem is required; this framework can be calculated to arbitrary accuracy and compared with experimental measurements.

A relativistic nuclear model containing interacting nucleons with mesons was proposed by Walecka [J.D. Walecka, Annals Phys. 83 (1974) 491-529] and is based on quantum field theory. The model is complex and computationally expensive; however, it can be approximated at higher densities by using a mean field approach in which the meson field operators are replaced by their respective expectation values. The resulting model, relativistic mean field theory (RMF), can be used to describe medium to high density nuclei through Dirac-Hartree calculations [C.J. Horowitz, Brian D. Serot, Nucl. Phys.A 368 (1981) 503-528] of the nuclear bound state. This method can be exactly solved for spherically symmetric nuclei such as $^{12}\text{C}$, $^{16}\text{O}$ and for some nearly-spherically symmetric nuclei such as $^{40}\text{Ar}$—the target nuclei used in neutrino experiments. The RMF model [R. González-Jiménez et al., Phys. Rev. C 100 (2019) 4, 045501] [R. González-Jiménez et al., Phys. Rev. C 101 (2020) 1, 015503] has already been used to evaluate electron and neutrino scattering on different nuclei. The RMF bound state model can then be coupled with the nucleon scattered state (the solution of the Dirac equation with a complex optical potential) to predict the hadronic current in lepton-nucleus scattering.

This talk presents the first work in implementing an RMF neutrino interaction model into the NEUT neutrino interaction event generator framework. This can provide a first glimpse into calculating an exclusive cross section using an neutrino interaction event generator and can provide the T2K experiment with a more theoretically robust model upon which to study systematic uncertainties.

Speaker: Mr Jake McKean (Imperial College (GB))

NuFACT_slides_25082023_JakeMcKean.pdf

124 Highlights from the Fermilab Workshop on Neutrino Event Generators

Simulations of neutrino-nucleus scattering are a critical input to oscillation analyses and various other investigations in high-energy physics. Achieving the physics goals of future experiments will require substantial improvements to the precision of these simulations. In March of this year, a workshop was held at Fermilab that examined several major topics related to future development of neutrino event generators. These included streamlining implementation of theory enhancements, standardizing event formats and interfaces to beam simulations, extending tools for model comparisons to neutrino and electron cross-section data, and quantifying systematic uncertainties. This talk will present highlights from the workshop proceedings and the outlook for the future of the field.

Speaker: Afroditi Papadopoulou

NuFACT23_Seoul_Papadopoulou_GeneratorWorkshopSummary.pdf

125 Impact of final-state de-excitation on modeling neutrino-nucleus interactions

As neutrino oscillation physics enters the precision era, the modeling of neutrino-nucleus interactions constitutes an increasingly challenging source of systematic uncertainty for new measurements. To confront such uncertainties, a new generation of detectors is being developed to measure the exclusive final state of neutrino interaction. Precise simulations of the nuclear effects on the final-state nucleons are needed to fully benefit from the improved detector capabilities.

To address this problem, we focused on the re-interactions of final state nucleons with the nuclear medium (FSI) by comparing NuWro and INCL cascade models and considering the de-excitation model from ABLA. INCL is an evolved nuclear cascade code primarily designed to simulate nucleon-, pion- and light-ion-induced reactions on nuclei. ABLA is a de-excitation code coupled to INCL that can simulate all the particles emitted by de-excitation. This is the first detailed study using the INCL model in the framework of neutrino physics and the first study investigating the effect of de-excitation on the hadronic final state of neutrino interactions. The results feature various novelties, including the production of nuclear clusters (e.g., deuterons, $\alpha$ particles) in the final state and the release of removal energy during the de-excitation stage.

We present a characterization of the hadronic final state after FSI and de-excitation, comparisons to available measurements of transverse kinematic imbalance, an assessment of the observability of nuclear clusters, and the impact of de-excitation on the energy released around the vertex.

Speaker: Anna Ershova (Université Paris-Saclay (FR))

presentation.pdf

126 Implementation of the Spectral Function in GENIE

The neutrino community is at an exciting time where new data with higher precision than ever is challenging the empirically based models which have been developed over the last several decades. Understanding this new data requires state of the art theory, leveraging collaboration between the nuclear physics, electron scattering, and neutrino community. One such state of the art model, the Spectral Function + Extended Factorization scheme, provides a unified approach to lepton-nucleus scattering and can incorporate the entire spectrum of interaction mechanisms from Quasi-elastic to Deep Inelastic scattering. Additionally, Spectral Functions derived from Quantum Monte Carlo methods allow for a concrete estimation of the theoretical error inherent to the factorization scheme.

In this talk I will summarize efforts to include the SF formalism in the GENIE neutrino event generator, starting with Quasi-elastic scattering and plans for other interaction mechanisms in the future. Validation against semi-exclusive electron and neutrino scattering data will be included highlighting the strengths of the SF approach relative to other models.

Speaker: Noah Steinberg (Fermi National Accelerator Laboratory)

NuFACT_GSF.pdf

parallel (room#302): #3 - WG5

Convener: Yu Seon Jeong (Chung-Ang University (KOR))

127 Investigating Lorentz Invariance Violation with the long baseline experiments P2O and DUNE

One of the basic foundations of quantum field theory is Lorentz invariance. The spontaneous breaking of Lorentz symmetry at a high energy scale can be studied at low energy extensions like the Standard model in a model-independent way through effective field theory (EFT). The present and future Long-baseline neutrino experiments can give a scope to observe such a Planck-suppressed physics of Lorentz invariance violation (LIV). In this talk, I will discuss how two future long baseline proposals DUNE and P2O can explore the LIV physics efficiently. We illustrate how the individual LIV parameters affect neutrino oscillations at P2O and DUNE baselines at the level of probability and derive analytical expressions to understand interesting degeneracies and other features. we estimate constraints on the individual LIV parameters at 95% confidence level (C.L.) intervals stemming from the combined analysis of simulated P2O and DUNE datasets, and highlight the improvement over the existing constraints.

Speaker: Mehedi Masud (Instituto de Física Corpuscular (CSIC-Universitat de València))

slides_masud_nufact.pdf

128 Non-standard neutrino interactions mediated by light scalar

Neutrino oscillation experiments have provided crucial insights into the nature of neutrinos, including the discovery of neutrino oscillations and the observation of CP violation. Non-Standard Neutrino Interactions (NSIs) have emerged as an important topic of study, as they can potentially modify the neutrino oscillation probabilities and affect the measurement of CP violation parameters. In this work, we investigate the impact of light scalar-mediated NSIs on CP violation measurements at the Deep Underground Neutrino Experiment (DUNE). We explore the parameter space probed by DUNE and discuss the constraints imposed by other relevant experiments.

Speaker: Sumit Ghosh (KIAS)

NuFact2023_SG.pdf

129 Beyond the Standard Model: Probing Modular Symmetries in High-Energy Neutrino Oscillations with DUNE, T2HK, and T2HKK

The focus of our study is to investigate neutrino mass models that arise from discrete non-abelian modular symmetry groups. These symmetries offer a promising theoretical approach to understanding neutrino phenomenology and involve multiple free parameters. Specifically, we examine models based on the $A_4$ modular symmetry and explore how the non-trivial transformation of Yukawa couplings impacts the flavor structure of the neutrino mass matrix. Our analysis demonstrates that the resulting mixing angles and CP-violating phase are consistent with the current oscillation data within a 3σ range.

We assume three such models and evaluate the potential of the DUNE and T2HK/T2HKK experiments to probe these models using best-fit values. Furthermore, we analyze how the determination of CP phase and atmospheric angle values is impacted by these models. To provide a more comprehensive understanding of the implications of our findings, we conduct a comparative study of DUNE and T2HK/T2HKK by performing a comprehensive parameter scan of the CP phase and atmospheric angle, independent of the fit.

Our research offers valuable insights into the impact of discrete non-Abelian modular symmetry groups on neutrino phenomenology. By exploring the implications of these models, we contribute to a deeper understanding of the underlying mechanisms that govern neutrino mass. This work has important implications for the broader field of particle physics and for future experiments seeking to probe the properties of neutrinos.

Speaker: Priya Mishra

nufact23_PriyaMishra_25th.pdf

130 Present and future constraints on flavor-dependent long-range interactions of high-energy astrophysical neutrinos

The discovery of new, flavor-dependent neutrino interactions would provide compelling evidence of physics beyond the Standard Model. We focus on interactions generated by the anomaly-free, gauged, abelian lepton-number symmetries, specifically $L_e-L_\mu$, $L_e-L_\tau$, and $L_\mu-L_\tau$, that introduce a new matter potential sourced by electrons and neutrons, potentially impacting neutrino flavor oscillations. We revisit, revamp, and improve the constraints on these interactions that can be placed via the flavor composition of the diffuse flux of high-energy astrophysical neutrinos, with TeV-PeV energies, i.e., the proportion of $\nu_e$, $\nu_\mu$, and $\nu_\tau$ in the flux. Because we consider mediators of these new interactions to be ultra-light, lighter than $10^{-10}$ eV, the interaction range is ultra-long, from km to Gpc, allowing vast numbers of electrons and neutrons in celestial bodies and the cosmological matter distribution to contribute to this new potential. We leverage the present-day and future sensitivity of high-energy neutrino telescopes and of oscillation experiments to estimate the constraints that could be placed on the coupling strength of these interactions. We find that, already today, the IceCube neutrino telescope demonstrates potential to constrain flavor-dependent long-range interactions significantly better than existing constraints, motivating further analysis. We also estimate the improvement in the sensitivity due to the next-generation neutrino telescopes such as IceCube-Gen2, Baikal-GVD, KM3NeT, P-ONE,
and TAMBO.

Speaker: Mr Sudipta Das (Institute of Physics, Bhubaneswar, India & HBNI, Mumbai, India)

Sudipta-Das-NuFact-2023.pdf

parallel (room#303): #3 - WG4x6

Convener: Prof. Kim Siang Khaw (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)

131 Status of the DeeMe experiment to search for the muon to electron conversion at J-PARC MLF

The DeeMe experiment is planned at J-PARC MLF H-Line.The experiment aims to search for the muon to electron conversion in the nuclear field, which is one of the charged lepton flavor violating processes that are forbidden in the Standard Model and expected to be highly sensitive to search for new physics.The DeeMe experiment will be the first search with using muonic carbon atoms.We aim to search with a single event sensitivity of $\mathcal{O}$($10^{-13}$).DeeMe spectrometer commissioning and performance tests are underway.In this presentation, we will describe the overview and current status of the DeeMe experiment.

Speaker: Yuta Higashino (Osaka Univ.)

NuFACT2023_higashino.pdf

132 COMET Phase-Alpha Experiment to Investigate COMET's New Muon Beamline at J-PARC

The COMET experiment aims to search for the muon-to-electron conversion process with a sensitivity 10,000 times better than the current best result. The muon-to-electron conversion process violates charged lepton flavor conservation, which is strictly forbidden in the Standard Model. Once discovered, the muon-to-electron conversion process will provide definitive evidence of the existence of new physics beyond the SM.

The key to significantly improving sensitivity lies in providing an intense muon beam. By utilizing the 8 GeV proton beam from the J-PARC facility, the COMET experiment will deliver a muon beam with a world-record intensity. To achieve this, the superconducting pion capture system and muon transportation system play crucial roles. In addition to intensity, the transportation system can select beam particles based on their charge and momentum to ensure the quality of the muon beam, which is essential for precise measurements. To investigate the muon beam and its transportation, the COMET collaboration proposed an experiment known as Phase-$\alpha$ to generate muons in the COMET experimental hall using the transportation system and directly measure the beam.

To measure the muon beam, three detectors were developed for the COMET Phase-$\alpha$ experiment. The first is the Muon Beam Monitor, which utilizes scintillating plastic fibers to measure the position and timing of beam particles. The second is the Straw Tube Tracker, which determines the position and direction of beam particles. The third detector is the Range Counter, consisting of plastic scintillators, absorbers, and targets, capable of counting negative muons in different momentum ranges and identifying positive pion decay chains. To further investigate transportation performance, a beam-masking device was placed in front of the transportation system to precisely control the initial phase space distribution of the injected muon beam. In addition to muon beam measurement, titanium dioxide (TiO₂) sensors were installed for primary proton measurement.

In February and March 2023, the COMET experimental hall received the muon beam for the first time. The COMET Phase-$\alpha$ experiment successfully observed muon beams delivered by the transportation system and collected valuable datasets for in-depth analysis. The ongoing data analysis process will be discussed, including detailed insights into the facility, experiment, detectors, and some preliminary results.

Speaker: Chen Wu (RCNP, Osaka University)

COMET Phase-Alpha Experiment to Investigate COMET's New Muon Beamline at J-PARC v2.pdf

133 Development of a muon entrance detector for the muEDM experiment at PSI

The muEDM experiment, currently under development at the Paul Scherrer Institute (PSI) in Switzerland, aims to probe the muon electric dipole moment (EDM) using the frozen-spin technique within a solenoidal storage ring. This experiment seeks to achieve a muon EDM sensitivity of 6×10^-23 e⋅cm, which is three orders of magnitude more precise than the current limit set by the BNL Muon g-2 collaboration. The experiment proceeds by injecting a muon into a solenoid via a superconducting channel. The muon then transverses an entrance detector which, upon detecting the muon, swiftly triggers a pulsed magnetic field to confine the muon within the solenoid's central region. This entrance detector has been designed to reject muons that exceed the solenoid's storage acceptance without causing notable multiple scatterings. We have developed a prototype detector equipped with a thin scintillator for identifying incoming muons, supplemented by four wall scintillators acting as veto detectors. These scintillators are light-readout using silicon photomultiplier. We evaluated the performance of the prototype using 27.5 MeV/c muons at PSI's πE1 beamline. This poster presents an overview of the prototype detector, discusses measured relative event rates for varying event topologies, and illustrates the distribution of detected photoelectrons for the veto detectors.

Speaker: Guan Ming Wong (TDLI (Shanghai Jiao Tong University))

WGM_nufact2023_v2.pdf

10:30 Coffee Break

parallel (room#101): #4 - WG1x5

Conveners: Dr. Rukmani Mohanta, Wuming Luo (Institute of High Energy Physics, Chinese Academy of Science)

134 Latest results of the DANSS experiment

The latest results of the DANSS experiment are presented. The plastic scintillator detector is located under 3.1 GW industrial reactor core of Kalinin Nuclear Power Plant, and its main purpose is the search for the short baseline neutrino oscillations. The inverse beta decay reaction is used for the antineutrino detection. The data are collected at three distances – 10.9, 11.9 and 12.9 meters from the reactor core center. The total number of the antineutrino events has reached 7M with about 1.5M new events from the lust year. New limits on the sterile neutrino oscillation parameters are presented. The evolution of the antineutrino counting rate and spectrum with the time of the reactor campaign will also be discussed. A model-dependent analysis of the data, including the absolute antineutrino flux, excludes nearly the whole area of the sterile neutrino parameters, preferred by the recent BEST results, and also the best fit point of the Neutrino-4 experiment. The study of the cosmic muon flux variations at the detector depth of 50 m.w.e., caused by the temperature and barometric effects, is also presented.
The status of the coming DANSS modernization will be presented. This upgrade will improve DANSS energy resolution and increase the sensitive volume, which will allow to cover of even larger area of the sterile neutrino parameters. In this case, the sensitivity of the DANSS detector will allow to check the latest BEST and Neutrino-4 experiments in a model-independent way.

Speaker: Eduard Samigullin

NuFACT_2023.pdf

NuFACT_2023.pptx

135 NEOS-II sensitivity for a light sterile neutrino

NEOS is an experiment to search for a sterile neutrino oscillation from a nuclear reactor core at a short baseline. The detector was deployed at a 24-m distance from a 2.8 gigawatt-thermal-power reactor core in the tendon gallery of the Hanbit-5 reactor. NEOS-II has recorded 388 (112) live-days of reactor-on (-off) data including a full reactor operation cycle and the reactor maintenance periods before and after the operation cycle. The sensitivity of finding the neutrino mass-squared-split and the mixing angle for the active-to-sterile neutrino oscillation has been studied, considering the statistical and systematic uncertainties of NEOS-II.

Speaker: Jonggeon Kim (SungKyunKwan university)

NEOS-II sensitivity_nufact_2023_KJG.pdf

136 Status of JSNS^2 and JSNS^2-II

The JSNS² (J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source) is an experiment with a neutrino detector utilizing a 3GeV proton beam on a mercury target in the J-PARC Materials and Life Science Experimental Facility. The primary goal of the JSNS² experiment is to search for the sterile neutrino with Δm² ~ 1eV by measuring a neutrino oscillation at a short baseline of 24m, providing a direct test of the LSND anomalies. The JSNS² experiment started commissioning in 2020 and continued physics data collection in 2023. A new far detector for JSNS²-II, which is the 2nd phase of the experiment using two detector is under construction at a distance of 48m from the source to increase the sensitivity of the sterile neutrino search. In this talk, we summarize the recent status of JSNS² and JSNS²-II.

Speaker: ChangDong Shin

NuFACT2023 JSNS2.pdf

parallel (room#102): no session

137 no session

parallel (room#103): #4 - WG3

Convener: Megan Friend (High Energy Accelerator Research Organization (JP))

138 J-PARC MR Upgrade Commissioning Status and Future Plan

The main ring synchrotron (MR) of Japan Proton Accelerator Research Complex (J-PARC) provides high power and high intensity beams for the neutrino and hadron experiments. We have been upgrading hardware from the summer of 2021 to shorten the repetition period aiming at 1.3 MW user operation for the neutrino experiments by 2028. The upgrades are progressing smoothly, and 760 kW equivalent beams were successfully accelerated in the fast extraction mode, which significantly exceeded the maximum beam power of 515 kW until JFY2021. In this presentation, we will report present status of the beam tunings and strategies for further beam power upgrade.

Speaker: Takaaki Yasui (High Energy Accelerator Research Organization (KEK))

NuFACT2023_yasui.pdf

139 nuSTORM; Neutrinos from Stored Muons

A rich cross-section and "beyond the Standard Model" (BSM) search programme will be served by the intense $\nu_e$ and $\nu_\mu$ beams that will be provided by the neutrinos from stored muons (nuSTORM) facility. Exceptional precision in cross section measurement and exquisite sensitivity in BSM searches are afforded at nuSTORM by the precise knowledge of the flavour composition and the energy distribution of the neutrino beams. These unique features are complemented by the ability to tune the mean energy of the beams and use this freedom to analyse the data using synthetic beams of limited energy spread.

The precision that nuSTORM will provide is critical to the elucidation of neutrino-nucleus scattering dynamics. Especially appealing are the prospects for new precise direct or indirect measurement of neutrino scattering cross sections on single nucleons. Such measurements will be a priceless input to the development of event generators and provide valuable information about hadron structure in the axial sector. The sensitivity of which nuSTORM is capable will allows exquisitely sensitive searches for short-baseline flavour transitions, covering topics such as light sterile neutrinos, non-standard interactions, and non-unitarity of the neutrino mixing matrix. In synergy with the goals of the neutrino-scattering program, BSM searches will also profit from measurements of exclusive final states. This would allow BSM neutrino interactions to be probed by means of precise measurements of neutrino-electron scattering, as well by searching for exotic final states, such as dileptons or single-photon signatures. We will describe the status of the development of the nuSTORM facility and the simulation of its performance. Illustrative examples of the precision and sensitivity that can be achieved will be presented. The implementation of nuSTORM as part of a Muon Collider "demonstrator facility" will also be discussed.

Speaker: Jaroslaw Pasternak

2023-08-25-Pasternak-nuSTORM.pdf

140 The Forward Liquid Argon Experiment at the Forward Physics Facility for High Energy Neutrino and Dark Matter Searches at LHC

The Forward Physics Facility (FPF) is a proposed program to build an underground cavern with the space and infrastructure to support a suite of far-forward experiments at the Large Hadron Collider during the High Luminosity era (HL-LHC). The Forward Liquid Argon Experiment (FLArE) is a Liquid Argon Time Projection Chamber (LArTPC) based experiment designed to detect very high-energy neutrinos and search for dark matter in FPF, 620 m from the ATLAS interaction point in the far-forward direction, and will collect data during HL-LHC. With a fiducial mass of 10 tonnes, FLArE will detect millions of neutrinos at the highest energies ever detected from a human source and will also search for Dark Matter particles with world-leading sensitivity in the MeV to GeV mass range. The LArTPC technology used in FLArE is well-studied for neutrino and dark matter experiments. It offers excellent spatial resolution and allows excellent identification of individual particles. In this talk, I will overview the physics reach, preliminary design, and status of FPF and FLArE.

Speaker: Prof. Jianming Bian (University of California Irvine (US))

FLArE_NuFACT_2023_08_25.pdf

141 Overview of Accelerator Programs in Korea and Their Potential Contributions to Neutrino/Muon Physics

Korea has several cutting-edge accelerator user facilities that are currently operational or in the commissioning phase. These include the 3rd Generation Synchrotron Light Source (PLS-II) and the X-ray Free Electron Laser (PAL-XFEL) situated in Pohang, the Korea Multi-purpose Accelerator Complex (KOMAC) located in Gyeongju, and the Rare Isotope Accelerator complex for ON-line experiments (RAON) based in Daejeon. Additionally, construction is underway for a new 4th Generation Storage Ring (4GSR) in Cheongju. In this presentation, we will provide an overview of the key specifications and planned upgrades for these accelerators and explore their potential roles in advancing neutrino/muon physics research.

Speaker: Moses Chung

2023_nufact_MosesChung.pdf

parallel (room#301): #4 - WG2

Convener: Christophe Bronner

142 Update on the Bodek-Yang model

This talk will present the status of the Bodek-Yang model.

Speaker: Prof. Un-ki Yang (Seoul National University)

BY_NuFACT-23.pdf

143 Neutrino Structure Functions from GeV to EeV Energies

Accurate theory calculations for neutrino-nucleus scattering rates are essential in the interpretation of neutrino experiments, from oscillation measurements to astroparticle physics at neutrino telescopes. In the deep-inelastic (DIS) regime, neutrino structure functions can be reliably evaluated in the framework of perturbative QCD. However, large uncertainties affect these structure functions at low momentum transfer, distorting event rate predictions for energies up to 1 TeV. We present a determination of the neutrino inelastic structure functions valid for all values of Q2, from the resonance region to ultra-high energies. Our approach combines a data-driven machine learning parametrization of neutrino structure functions at low and moderate Q2 values matched to perturbative QCD calculations at large Q2. We compare our results to other calculations in the literature and outline the implications for neutrino telescopes.

Speaker: Dr Alfonso Andres Garcia Soto (IFIC)

nufact1.pdf

144 Neutrino data for nuclear parton distribution fonction determinations

Global analyses of nuclear Parton distribution functions (nPDFs) play a crucial role in making precise predictions for a wide range of processes in lepton-nucleus (lA), proton-nucleus (pA), and heavy ion collisions (AA). In this context, the inclusion of neutrino deep inelastic scattering (DIS) data is particularly important as it enables an improved flavour separation of the parton densities. However, over the past two decades several studies have reported tensions when attempting to combine neutrino and charge lepton DIS data. In this talk, we present the recent and detailed study of the compatibility of neutrino DIS data within the nCTEQ frame work based on arXiv:2204.13157.

Speaker: Ji Young Yu (southern methodist university)

nufact23.pdf

145 Neutrino scattering in the NOvA Near Detector

NOvA is a long-baseline accelerator-based neutrino experiment based in the USA. NOvA uses an intense neutrino beam produced at Fermilab’s accelerator complex to make physics measurements of neutrino oscillations, neutrino cross sections, and much more. For its physics goals, NOvA uses two functionally-identical detectors. The Near Detector (ND) is situated at Fermilab, 1 km from the neutrino target and the Far Detector (FD) is located at Ash River, MN, a distance of 810 km from the neutrino source. The ND receives a high statistics neutrino flux which gives a unique opportunity for high-precision neutrino cross-section measurements and is used as a control for the oscillation analyses.
In this talk/poster, I will give an overview of the NOvA experiment. I will also talk about the current and future status of the NOvA’s cross-section physics program.

Speaker: Prabhjot Singh

NuFACT_2023_NOvA_PrabhjoSingh_v1.pdf

parallel (room#302): #4 - WG6

Convener: Yasuhiro NISHIMURA (Keio University)

146 The Camera System for the IceCube Upgrade: Introduction to Its Purpose and Production.

The IceCube Neutrino Observatory is the largest neutrino telescope located deep within the South Pole ice. Currently, an upgrade with denser spaced sensors is being built and one of the goals of the IceCube Upgrade is a precise characterization of the optical properties of the Antarctic ice, which is the source of the largest systematic uncertainty for most IceCube analysis. Calibration devices replying on LED flashers and lasers were used to calibrate the detector’s geometry, infer ice properties and determine the stratigraphy of the ice at the IceCube detector site. For the IceCube Upgrade, uniform light sources, and a novel camera-based calibration system will be added for even more precise calibration. The IceCube Upgrade Camera system, developed with the goal of measuring ice properties and observing the refrozen ice in the drill holes, will be integrated into every newly designed Digital Optical Modules (DOMs).
In parallel to the production and integration of these cameras, detailed measurement plans are being developed and simulation studies are being conducted. In this presentation, the objectives and plans for studying the detector medium using the IceCube Upgrade Camera system will be introduced. In addition, details on the device's hardware specifications and performance tests will be included. This novel calibration system will provide a better understanding of the properties of glacier ice and enable more accurate measurements of neutrino events in the IceCube Upgrade.

Speaker: Mr Seowon Choi (Sungkyunkwan Universitiy)

Nufact_ICUCam_WG6.pdf

Nufact_ICUCam_WG6.pptx

147 WIT: from low energy to supernova neutrinos for Super-Kamiokande in the SK-Gd phase.

The Super-Kamiokande water Cherenkov underground neutrino observatory is located in Japan. Since 2020, it has undergone two loadings with gadolinium sulfate. In the first loading during summer 2020, 13 tons of gadolinium sulfate octahydrate were dissolved, corresponding to a mass concentration of 0.02% gadolinium sulfate. In the second loading, 26 tons were diluted, resulting in a mass concentration of 0.06% gadolinium sulfate. These loadings enabled approximately 50% and 75% of neutron captures on gadolinium after the first and second loadings, respectively, leading to a new phase known as SK-Gd. In this phase, neutron captures predominantly occur on gadolinium, significantly improving the sensitivity to anti-neutrinos.

The Wide-band Intelligent Trigger (WIT) is a computing farm that receives online data from Super-Kamiokande's data acquisition system (DAQ) and triggers on events with a kinetic energy of at least 2.5 MeV. These events are then stored for later analysis. Although WIT was originally designed to improve Solar analyses, the dissolution of gadolinium has opened up new physics opportunities. One of these opportunities is the study of spallation-induced backgrounds, which are relevant for various analyses. Additionally, the online detection of supernovae has become possible, ranging from the detection of pre-core collapse supernova anti-neutrinos from massive and close stars to the detection of galactic core collapse supernovae using only their anti-neutrinos.

Speaker: Lluis Marti

Marti-WIT.v2.pdf

148 A ton-scale single phase LAr CEvNS detector

Coherent elastic neutrino-nucleus scattering (CEvNS) was predicted in 1974 as a consequence of the weak neutral current. 43 years later, the COHERENT collaboration first observed CEvNS using a 14.6-kg CsI detector. After 3 years, CEvNS on argon was measured using COH-Ar-10 (CENNS-10), 24-kg liquid argon detector. There are many physics opportunities related to CEvNS, but COH-Ar-10 has ~30% statistical uncertainty in the measured cross-section according to the published result. In this talk, I will introduce COH-Ar-750 (CENNS-1ton), a ton-scale liquid argon CEvNS precision detector under construction.

Speaker: Haemin Jeong

20230825 NuFACT2023 Haemin.pdf

149 Signal Processing in SBND with WireCell

The Short Baseline Near Detector (SBND), a 112 ton liquid argon time projection chamber (LArTPC), is the near detector of the Short Baseline Neutrino Program at Fermilab. In a LArTPC, ionization electrons from a charged particle track drift along the electric field lines, inducing bipolar signals on the induction planes, and a unipolar signal collected on the collection plane. In this talk, I present the techniques by which the final digitized waveforms, comprising of the original ionization signal convoluted with detector field response and electronics response as well as noise is processed to recover the original ionization signal in charge and time. The implementation of a 2D deconvolution (in time and wire dimensions) is introduced as a natural complement to the inter-wire and intra-wire induction field ranges and contours inherent to LArTPC signals. I also introduce a deep neural network (DNN) in LArTPC signal processing, to improve traditional signal region of interest (ROI) detection, as well as a novel 3-D tomographic imaging method for further reconstruction, which enables the true power of 3D tracking calorimetry in LArTPCs.

Speaker: Avinay Bhat (University of Chicago)

20230824.pdf

150 The 2x2 Demonstrator: DUNE ND-LAr Prototype

The Deep Underground Neutrino Experiment (DUNE) is a precision long-baseline neutrino oscillation experiment that will employ LArTPC technology in a near detector placed at Fermilab and a far detector at the Sanford Underground Research Facility, at a baseline of 1300 km. The DUNE Liquid Argon Near Detector (ND-LAr) design takes into account the high neutrino intensity expected from the LBNF beam: several optically separated time projection chambers are instrumented with a pixel-based, true 3D charge readout alongside scintillation light traps to disentangle the O(50) neutrino events expected per 10us beam spill. The 2x2 Demonstrator will test the DUNE ND-LAr design between upstream and downstream repurposed MINERvA tracking planes under the NuMI beam at Fermilab in the few-GeV energy range. It consists of four 0.7m x 0.7m x 1.4m TPC modules filled with 2.6t of LAr, read out by over 300k charge-collecting pixels. Every module has been commissioned and tested with cosmic ray data at the University of Bern. The 2x2 Demonstrator is scheduled to begin data-taking in Fall 2023, collecting the first neutrino beam data with this technology. This talk will provide an overview of the detector design for ND-LAr and the 2x2 demonstrator, as well as the latter’s status and expected physics program.

Speaker: Roberto Mandujano

NuFact_2023_2x2_DUNE.pdf

parallel (room#303): #4 - WG4

Convener: Gavin Hesketh (University College London (UK))

151 Beam dynamics corrections to measurements of the muon anomalous magnetic moment

The Muon g-2 experiment at Fermilab is making progress towards its physics goal of measuring the muon anomalous magnetic moment with the unprecedented precision of 140 parts per billion. In April 2021 the collaboration published the first measurement, based on the first year of data taking. The second result is based on the second and third years of data taking combined. In this talk, we discuss the corrections to the anomalous spin precession signal due to beam dynamics effects being used to determine the anomalous spin precession frequency for the second result.

Speakers: Prof. Kim Siang Khaw (Tsung-Dao Lee Institute, Shanghai Jiao Tong University), Dr Kim Siang Khaw (Tsung-Dao Lee Institute (CN))

NuFact2023-MuonG2BDCorrections-Khaw.pdf

NuFact2023-MuonG2BDCorrections-Khaw.pptx

152 Measurement of the magnetic field in the Fermilab Muon g−2 experiment

The Muon g-2 experiment at Fermilab measures the muon magnetic-moment anomaly, $a_\mu=(g-2)/2$, with the ultimate goal of 140 parts per billion (ppb) precision. This requires determining the absolute magnetic field, averaged over space and time, experienced by the muons, expressed as the nuclear magnetic resonance frequency of protons in a spherical pure water sample at a specified reference temperature. A chain of calibrations and measurements maps and tracks the magnetic field providing the muon-weighted average field with precision better than 60 ppb. This talk will present the principles, practical realizations, and innovations incorporated into the measurement and analysis of the magnetic field for the 2019-20 data sets.

Speaker: Simon Corrodi

NuFact2023_G2_Field_build_v2.pdf

NuFact2023_G2_Field.pptx

NuFact2023_G2_Field_smaller.pdf

NuFact2023_G2_Field_smaller.pptx

153 Measurement of the muon anomalous precession frequency $\omega_a$ in the Fermilab muon g−2 experiment

The Fermilab Muon g-2 experiment was designed to measure the muon's anomalous magnetic moment $a_\mu = (g-2)/2$ to 140 parts per billion. The value of $a_\mu$ is proportional to the difference frequency $\omega_a = \omega_s - \omega_c$ between the muon's cyclotron frequency and spin precession frequency in the uniform magnetic field of the g-2 storage ring. The frequency $\omega_a$ is extracted from the time distribution of the mu-decay positrons recorded by 24 electromagnetic calorimeters positioned around the inner circumference of the storage ring. We will discuss the various approaches to the frequency determination including the reconstruction and fitting of time distributions, fitting of time distributions, and procedures for handling the effects of gain changes, positron pileup and beam dynamics. We also discuss the data consistency checks and the strategy for the averaging of the $\omega_a$ across the different analyses.

Speaker: Dr Paolo Girotti (Istituto Nazionale di Fisica Nucleare Pisa)

pgirotti_nufact23_25aug2023.odp

pgirotti_nufact23_25aug2023.pdf

pgirotti_nufact23_25aug2023.pptx

154 Status of muon g-2/EDM experiment at J-PARC

In 2021, the anomalous magnetic moment of the muon, a_µ = (g_µ-2)/2, was measured at the Fermilab National Accelerator Laboratory (FNAL) with a precision of 0.46 ppm. This measurement result is consistent with the previously value measured more than a decade ago at the Brookhaven National Laboratory (BNL), and the deviation from the Standard Model (SM) prediction has been reported with a significance of 4.2 standard deviations. This suggests the potential existence of new physics beyond the SM, but it needs to be verified through measurements employing different methods. The muon g-2/EDM experiment at J-PARC aims to measure a_µ and the electric dipole moment (EDM) using a low-emittance muon beam realized through the acceleration of thermal muons and silicon tracking detectors, employing a different approach from the BNL and FNAL experiments. This presentation provides an update on the current status of each experimental component.

Speaker: Yuta Okazaki (KEK)

NuFact2023_Okazaki.pdf

12:40 Lunch (rakgujung, B1F, building#38, SNU)

parallel (room#101): #5 - WG1x6

Convener: Miao He hem

155 Deep Learning applications to the event reconstruction in JUNO

Jiangmen Underground Neutrino Observatory (JUNO), located in the southern part of China, will be the world’s largest liquid scintillator (LS) detector upon completion. Equipped with 20 kton LS, about 17612 20-inch PMTs and 25600 3-inch PMTs in the central detector (CD), JUNO will provide a unique apparatus to probe the mysteries of neutrinos, particularly the neutrino mass ordering puzzle. One of the main challenges for JUNO is the high-precision event reconstruction. In recent decades Deep Learning has been more and more widely used in various neutrino experiments. If each PMT is viewed as a pixel, the JUNO CD can be regarded as a large spherical camera, providing a perfect scenario for the application of Deep Learning. This talk will present a few Deep Learning applications to the event reconstruction in JUNO. These Deep Learning based methods not only provide alternative approaches complementary to the traditional ones, but also demonstrate huge potential on enhancing the performance of the JUNO detector.

Speaker: Wuming Luo (Institute of High Energy Physics, Chinese Academy of Science)

NuFact23_luowm.pdf

156 Deep Learning Reconstruction at DUNE Far Detector

DUNE, the flagship next-generation neutrino experiment in the United States, is designed to decisively measure neutrino CP violation and the mass hierarchy. Its far detector modules utilize Liquid Argon Time Projection Chamber (LArTPC) technology, which provides exceptional spatial resolution and the potential to accurately identify final state particles and neutrino events. However, this enhanced spacial resolution exposes fine details of the neutrino interactions and their final states, which need to be harnessed during event reconstruction to fully utilize the potential of the detector technology. Fortunately, deep learning techniques, in particular convolutional neural networks (CNNs), offer a promising solution. These methods allow the direct reconstruction of neutrino events from images representing interactions. In this talk I will describe the development of deep learning based reconstruction methods at DUNE. I will also discuss the application of deep learning methods to data from the DUNE prototype detector ProtoDUNE at CERN.

Speaker: Prof. Jianming Bian (University of California Irvine (US))

DUNEFDDL_NuFACT_2023_08_25.pdf

157 Classification of muon- and electron neutrino events for the ESSnuSB Near Detector using Graph Neural Networks

Accurate and fast event reconstruction is central for the design and performance of the ESSnuSB detectors. While precise, the currently proposed likelihood-based method for event reconstruction is computationally expensive. In recent years, machine learning methods have been implemented for reconstruction in several high energy physics experiments, including neutrino experiments, enabling fast reconstruction without reducing performance and in some cases even improving it.
In this work, we investigate the use of Graph Neural Networks (GNNs) for classification of muon and electron events and muon- and electron neutrino charged current events in the Near Detector of the proposed ESSnuSB experiment. We demonstrate that the accuracy of the GNN method is comparable to that of the likelihood method, and that the GNN can even learn the signatures of, and accurately identify, complex events that are currently discarded, while providing a factor 104 increase in reconstruction speed. Furthermore, we study the performance of the GNN by investigating the relation between event signatures and reconstruction performance.
Using the GNN based method will enable fast event reconstruction when making changes to the detector design, and will thus allow for easier investigation of different detector designs. Eventually, the GNN could also be used for regression tasks, such as energy reconstruction. In this talk, we will present the method and results of training and running a GNN on simulated events for the ESSnuSB detectors, and compare the performance and reconstruction speed to the likelihood-based method.

Speaker: Kaare Endrup Iversen (Lund University (SE))

NuFACT2023_ESSnuSB_KaareEndrupIversen.pdf

158 Prospects for physics with the T2K ND280 Upgrade

Neutrino oscillation physics has now entered the precision era. In parallel with needing larger detectors with which to collect more data, future experiments further require a significant reduction of systematic uncertainties with respect to what is currently available. In the neutrino oscillation measurements from the T2K experiment the systematic uncertainties related to neutrino interaction cross sections are currently dominant. To reduce this uncertainty, a much improved understanding of neutrino-nucleus interactions is required. In particular, it is crucial to better understand the nuclear effects, which can alter the final state topology and kinematics of neutrino interactions in such a way that can bias neutrino energy reconstruction and therefore bias measurements of neutrino oscillations.

The upgraded ND280 detector will consist of a totally active Super-Fine-Grained-Detector (SFGD) composed of 2 millions 1 cm3 scintillator cubes with three 2D readouts, two High Angle TPCs (HA-TPC) instrumented with resistive MicroMegas modules, and six TOF planes. It will directly confront our naivety of neutrino interactions thanks to its full polar angle acceptance and a much lower proton tracking threshold. Furthermore, neutron tagging capabilities in addition to precision timing information will allow the upgraded detector to estimate neutron kinematics from neutrino interactions. Such improvements permit access to a much larger kinematic phase space, which correspondingly allows techniques such as the analysis of transverse kinematic imbalances to offer important constraints on the pertinent nuclear physics for T2K analyses.

Speaker: Laura Munteanu (CERN)

Munteanu_NuFACT2023_T2KUpgrade_v2.pdf

159 Simulation and reconstruction of neutrino interactions in the upgraded T2K ND280 detector

The T2K magnetized near detector (ND280) at J-PARC is undergoing a major upgrade with a new 3D fine-granularity scintillator active targe with 3D imaging capabilities as well as ~3mm spatial resolution and sub-ns time resolution, two novel Time Projection Chambers (TPC), surrounded by a precise scintillator-based Time of Flight detector (ToF) with 200 ps time resolution.
Thanks to such innovative technologies, unprecedented details of neutrino interactions will be provided.
Hence, it becomes crucial to develop an accurate simulation and reconstruction of neutrino interactions to enhance the phase space acceptance and obtain isotropic particle tracking, low proton momentum threshold, neutron detection with measurement of the kinetic energy and an improved TPC tracking resolution thanks to the charge spreading in the novel resistive Micromegas detectors, all with a 2 tonnes neutrino target mass.
These ongoing efforts, that will pave a new way of looking at neutrino interactions, will be reported.

Speaker: Katharina Lachner (University of Warwick)

t2k_nd280_upgrade_sim_and_reco.pdf

parallel (room#102): no session

160 no session

parallel (room#103): no session

161 no session

parallel (room#301): #5 - WG2

Convener: Dr Elena Gramellini (University of Manchester)

162 Measurement of the inelasticity distribution of neutrino-nucleon interactions for 100 GeV < E_nu < 1 TeV with IceCube DeepCore

IceCube DeepCore, a sub-array of the IceCube neutrino observatory, has a high-density configuration and it is sensitive to neutrinos with energies above a few GeV. In this contribution, we present a measurement of the shape of differential cross section as a function of inelasticity for neutrino-nucleon interactions in the energy range from 100 GeV to 1 TeV. The measurement is based on a high-purity sample of starting muon-neutrino events from charge interactions detected by IceCube DeepCore over a period of 9.2 years. Our measurement bridges a critical gap between the prior IceCube result and accelerator differential cross section measurements. We compared our results with predictions using different combinations of available flux and cross section models.

Speaker: Maria Liubarska (University of Alberta)

inelasticity_nufact23 (2).pdf

163 Recent results from MINERvA

MINERvA is an experiment designed to precisely study neutrino-nucleus interactions in the 1-20 GeV energy range using the NuMI high-intensity neutrino beam at the Fermi National Accelerator Laboratory. MINERvA has improved our knowledge of neutrino cross sections at low energy, low $Q^2$, and the A-dependence in these interactions. These data are interesting in their own right, and have been important in reducing the systematic errors in oscillation experiments. An overview of MINERvA results will be presented.

Speaker: Vaniya Ansari (Aligarh Muslim University)

NuFACT2023_MINERvA.pdf

164 Neutrino Interaction Measurement Capabilities of the SBND Experiment

The Short-Baseline Near Detector (SBND) is a 100-ton scale Liquid Argon Time Projection Chamber (LArTPC) neutrino detector positioned in the Booster Neutrino Beam at Fermilab, as part of the Short-Baseline Neutrino (SBN) program. The detector is currently under construction and is anticipated to be filled with liquid argon in fall 2023. Located only 110 m from the neutrino production target, it will be exposed to a very high flux of neutrinos and will collect millions of neutrino interactions each year. This huge number of neutrino interactions with the precise tracking and calorimetric capabilities of LArTPC will enable a wealth of cross section measurements with unprecedented precision. In addition, SBND has the unique characteristic of being remarkably close to the neutrino source and not perfectly aligned with the neutrino beamline, in such a way that allows sampling of multiple neutrino fluxes using the same detector, a feature known as SBND-PRISM. SBND-PRISM can be utilized to study distinctive neutrino-nucleus interactions channels. This talk will present the current status of the experiment along with expectations for a rich cross section program ahead.

Speaker: Andrew Furmanski (University of Minnesota (US))

SBND_NuFact2023.pdf

165 The MicroBooNE cross section program, with a special focus on the TKI analysis

The MicroBooNE liquid argon time projection chamber (LArTPC) experiment operated in the Fermilab Booster Neutrino and Neutrinos at the Main Injector beams from 2015-2021. Among the major physics goals of the experiment is a detailed investigation of neutrino-nucleus interactions. MicroBooNE currently possesses the world's largest neutrino-argon scattering data set, with eight published measurements and more than thirty ongoing analyses studying a wide variety of interaction modes. This talk provides an overview of MicroBooNE's neutrino cross-section physics program, including investigations of exclusive pion final states and rare processes, novel cross section extraction methods, and measurements with both muon and electron neutrinos from the BNB and NuMI beamlines.

Speaker: Afroditi Papadopoulou

NuFACT23_MicroBooNE_XSec_Talk_Aug_2023.pdf

166 First measurement of 𝜂 production in neutrino interactions on argon with the MicroBooNE experiment

The modeling of resonant neutrino interactions on argon is a critical aspect of the neutrino oscillation and beyond the standard model physics programs being carried out by the DUNE and Short Baseline Neutrino experiments. Resonant interactions are typically studied in events with pions in the final state. The measurement of 𝜂 production provides a powerful new probe of resonant interactions, complementary to pion channels. This talk will present the first measurement of the flux-integrated $\nu_{\mu} + \textrm{Ar} \rightarrow \eta + x$ cross-section with the MicroBooNE experiment. How this rare signature is identified, and the implications of measuring $\eta$ production for accelerator neutrino experiments more broadly will be discussed.

Speaker: Prof. David Caratelli (UC Santa Barbara)

ETA_082523_NuFact23.pdf

167 Electrons For Neutrinos: The Next Generation

The ability of current and next generation accelerator based neutrino oscillation measurements to reach their desired sensitivity and provide new insight into the nature of our Universe, requires a high-level of understanding of the neutrino-nucleus interactions. These include precise estimation of the relevant cross sections and the reconstruction of the incident neutrino energy from the measured final state particles.

The electron for neutrinos collaboration leverages wide phase-space exclusive electron scattering data with known beam energies to test energy reconstruction methods and interaction models. In this talk we will summarize new results and analyses underway measuring proton transparency, a crucial diagnostic observable for event generators' intranuclear cascade models, as well as a new exclusive $1p1\pi$ analysis. We will also discuss new data taken in 2022 with beams at the same energy region and similar nuclear targets as expected in the next generation of accelerator based neutrino oscillation experiments.

Speaker: Noah Steinberg (Fermi National Accelerator Laboratory)

NuFact2023_e4v.pdf

parallel (room#302): #5 - WG3

Convener: Katsuya Yonehara

168 A monitored neutrino beam for high precision cross section measurements: the ENUBET experiment at CERN

Monitored neutrino beams represent a powerful and cost effective tool to suppress cross section related systematics for the full exploitation of data collected in long baseline oscillation projects like DUNE and Hyper-Kamiokande. In the last years the NP06/ENUBET project has demonstrated that the systematic uncertainties on the neutrino flux can be suppressed to 1% in an accelerator based facility where charged leptons produced in kaon and pion decays are monitored in an instrumented decay tunnel. In this talk, we will present the final results of this successful R&D programme. The collaboration is now working to provide the full implementation of such a facility at CERN in order to perform high precision cross section measurements at the GeV scale exploiting the ProtoDUNEs as neutrino detectors. This contribution will present the final design of the ENUBET beamline that allows to collect $\sim$10$^4$ $\nu_e$ and $\sim$6$\times$10$^5$ $\nu_{\mu}$ charged current interactions on a 500 ton LAr detector in about 2 years of data taking. The experimental setup for high purity identification of charged leptons in the tunnel instrumentation will be described together with the framework for the assessment of the final systematics budget on the neutrino fluxes, that employs an extended likelihood fit of a model where the hadro-production, beamline geometry and detector-related uncertainties are parametrized by nuisance parameters. We will also present the results of a test beam exposure at CERN-PS of the Demonstrator: a fully instrumented 1.65 m long section of the ENUBET instrumented decay tunnel. Finally the physics potential of the ENUBET beam with ProtoDUNE-SP and plans for its implementation in the CERN North Area will be discussed.

Speaker: Andrea Longhin

ENUBET_NuFact2023_v4.pdf

169 Time Slicing of Neutrino Fluxes in Oscillation Experiments at Fermilab

The upcoming long baseline neutrino experiments have the goal of enhancing proton beam power to a multi-MW scale and utilizing large-scale detectors to address the challenge of limited event statistics. The DUNE experiment at LBNF will test the three neutrino flavor paradigm and directly search for CP violation by studying oscillation signatures in the high intensity $\nu_{\mu}$ (anti-$\nu_{\mu}$) beam to $\nu_e$ (anti-$\nu_e$) measured over a long baseline.\par
As long baseline neutrino experiments progress into a phase of increased precision, it becomes crucial to minimize systematic errors to a few percent in order to achieve their desired scientific objectives. One of the most demanding contributors to these systematic errors arises from the cross sections of neutrino-nucleus interactions.
During this presentation, a novel approach called the "stroboscopic approach" is introduced as an innovative research and development technique for neutrino beams. By exploiting the correlation between the true neutrino energy and the measured neutrino arrival time, this technique selects different neutrino energy spectra from a wide-band neutrino beam. It uniquely allows access to true energy information at the Far detector, which is not possible from any other existing part of the DUNE experiment.\par
Three different thrusts are necessary for the application of stroboscopic approaches, namely: 1) creation of short (~300ps) proton bunch length, 2) implementation of fast timing to get equivalent time resolution in the detectors, 3) establishment of synchronization between the time at the detector and time of the bunch-by-bunch proton at the target. This talk will explain how the three different thrusts emerge from the same objective of understanding how the stroboscopic approach brings its own critical contribution to DUNE and US neutrino physics.\par
Obtaining a better understanding of the cross sections is critical for DUNE experiment and neutrino physics as a whole and US accelerator-based neutrino beams will benefit from this novel technique.

Speaker: Meghna Bhattacharya (Fermilab)

Nufact_abstract_SG.pdf

Stroboscopic_NuFact_2023_SG.pdf

170 Impact of of light sterile neutrino at the long-baseline experiment options at KM3NeT

We have studied the capability of different long-baseline experiment options at the KM3NeT facility i.e., P2O, Upgraded P2O and P2SO to probe the light sterile neutrino and compare their sensitivities with DUNE. The P2O option will have neutrinos from a 90 KW beam at Protvino to be detected at the ORCA detector, the Upgraded P2O will have neutrinos from the upgraded 450 KW beam to be detected at the ORCA detector and the option P2SO will have neutrinos from a 450 KW beam to be detected at the upgraded Super-ORCA detector. All these options will have a baseline around 2595 km. Our results show that the experiments at the KM3NeT (DUNE) would be more sensitive if the value of $\Delta m^2_{41}$ is around 10 (1) eV$^2$. Our results also show that the role of near detector is very important for the study of sterile neutrinos and addition of near detector improves the sensitivity as compared to only far detector for 3+1 scenario. Among the three options at KM3NeT, the sensitivity of P2O and upgraded P2O is limited and sensitivity of P2SO is either comparable or better than DUNE.

Speaker: Rudra Majhi

nufact23_rudra.pdf

171 NA61/SHINE experiment for neutrino physics

In long-baseline neutrino oscillation experiments, understanding hadron reactions is essential for neutrino generation. Neutrinos are produced by striking a carbon target with proton beam and then decaying the emitted hadrons such as pions and kaons. The hadron interaction is a primary source of the neutrino beam flux prediction uncertainty. Therefore, accurate hadron production and hadron-nucleus interaction measurements are critical. The NA61/SHINE experiment at the Super Proton Synchrotron at CERN is being conducted with that as one of its objectives. In this presentation, the results of the neutrino program so far are reviewed. Next, the recent measurements for T2K and Fermilab long-baseline neutrino experiments are presented. Finally, we discuss the prospects for future hadron production measurements including a low-energy beamline that may extend NA61/SHINEʼs physics program in the near future. The low-energy hadron production measurements will be beneficial for not only long-baseline neutrino oscillation but also atmospheric neutrino oscillation experiments.

Speaker: Yusuke Koshio

parallel (room#303): #5 - WG4x5

Convener: Yuki Fujii

172 Complementarity of low- and high-energy probes for lepton flavour physics

The neutrino sector is currently not well constrained and may be hiding new physics beyond neutrino masses. I will consider a model-independent approach using effective field theory and discuss different ways to probe interactions between neutrinos and quarks using a range of different processes from coherent elastic neutrino nucleus scattering (CE$\nu$NS) and invisible meson decays to lepton flavour universality violation.

Speaker: Michael Schmidt (UNSW Sydney)

NuFact2023_MichaelSchmidt-WG45.pdf

173 Vector leptoquark $U_3$: A possible solution to the recent discrepancy between NOvA and T2K results on CP violation

In the current epoch of neutrino physics, many experiments are aiming for precision measurements of oscillation parameters. Thus, various new physics scenarios which alter the neutrino oscillation probabilities in matter deserve careful investigation. Recent results from NOvA and T2K show a slight tension on their reported values of the CP violating phase $\delta_{CP}$. Since the baseline of NOvA is much larger than the T2K, the neutral current non-standard interactions (NSIs) of neutrinos with the earth matter during their propagation might play a crucial role for such discrepancy. In this context, we study the effect of a vector leptoquark which induces non-standard neutrino interactions that modify the oscillation probabilities of neutrinos in matter. We show that such interactions provide a relatively large value of NSI parameter $\varepsilon_{e \mu}$. Considering this NSI parameter, we successfully explain the recent discrepancy between the observed $\delta_{CP}$ results of T2K and NOvA. We also briefly discuss the implication of $U_3$ leptoquark on lepton flavour violating muon decay modes: $\mu \to e \gamma$ and $\mu \to ee e$.

Speaker: Dr. Rukmani Mohanta

NuFact-RM.pdf

174 Charged lepton flavor violation for a probe to the neutrino masses and their hierarchy

The standard model of particle physics is far from accounting for mysteries about our universe, --e.g., what is origin of neutrino masses and their hierarchy?-- and it must be extended to a more fundamental description of nature. Such new physics models allow Charged Lepton Flavor Violating (CLFV) reactions which are exactly forbidden in the standard model. Hence search for CLFV is a clue to the new physics, which unveil the flavor structure and the symmetries behind it. In this talk, the connections between models for neutrino masses and CLFV processes are reviewed, and relevant experimental progresses are discussed.

Speaker: Masato Yamanaka (Yokohama National University)

NuFact2023-Yamanaka.pdf

16:00 Coffee Break

parallel (room#101): #6 - WG1

Convener: Prof. Jianming Bian (University of California Irvine (US))

175 T2K latest oscillation results

T2K is a long baseline neutrino experiment which exploits a neutrino and antineutrino beam produced at the Japan Particle Accelerator Research Centre (J-PARC) to provide world-leading measurements of the parameters governing neutrino oscillation. Neutrino oscillations are measured by comparing neutrino rates and spectra at a near detector complex, located at J-PARC, and at the water-Cherenkov far detector, Super-Kamiokande, located 295 Km away.

The latest T2K results include multiple analysis improvements, in particular a new sample is added at the far detector requiring the presence of a pion in muon-neutrino interactions. It is the first time that a pion sample is included in the study of neutrino disappearance at T2K and, for the first time, a sample with more than one Cherenkov ring is exploited in the T2K oscillation analysis, opening the road for future samples with charged- and neutral-pion tagging. The inclusion of such a sample assures proper control of the oscillated spectrum on a larger neutrino-energy range and on subleading neutrino-interaction processes.

T2K is also engaged in a major effort to perform a joint fit with the Super-Kamiokande neutrino atmospheric measurements and another joint fit with NOvA. Such combinations allow to lift the degeneracies between the measurement of the CP-violating phase $\delta_{CP}$ and the measurement of the ordering of the neutrino mass eigenstates. Results and prospects of such joint fits will be discussed.

Speaker: Adrien Blanchet (University of Geneva)

20230825_NuFact_T2K_results_Blanchet.pdf

176 NOvA Three Flavor Results

NOvA is a long-baseline neutrino experiment placed in the muon neutrino-dominated NuMI beam based at the Fermi National Accelerator Laboratory, USA. Utilizing two functionally-identical tracking calorimeters placed 809 km apart, NOvA observes the appearance of electron neutrinos and the disappearance of muon neutrinos. By observing these neutrino oscillations along with their antineutrino counterparts, NOvA is probing outstanding questions in neutrino physics including the neutrino mass ordering, leptonic CP violation parameterized by the phase dCP, the larger neutrino mass splitting dmsq32, and the mixing angle th23. This talk will present the most recent 3-flavor neutrino oscillation results from NOvA in both the Frequentist and Bayesian formalisms.

Speaker: Adam Aurisano (University of Cincinnati)

aurisanoNuFact23_NOvAUpdate (1).pdf

177 DUNE: Long-Baseline Oscillation Sensitivity

The Deep Underground Neutrino Experiment (DUNE) is a next generation long baseline neutrino experiment for oscillation physics and proton decay studies. The primary physics goals of the DUNE experiment are to perform neutrino oscillation physics studies, search for proton decay, detect supernova burst neutrinos, make solar neutrino measurements and BSM searches. The liquid argon prototype detectors at CERN (ProtoDUNE) are a test-bed for DUNE’s far detectors, which have operated for over 3 years, to inform the construction and operation of the first two and possibly subsequent 17-kt DUNE far detector LArTPC modules. Here we introduce the DUNE and protoDUNE experiments and physics goals as well as discussing recent progress and results.

Speaker: Dr Luke Pickering (Royal Holloway, University of London)

NuFact2023_DUNELBL_2.pdf

178 Neutrino oscillation sensitivity of the Hyper-Kamiokande experiment

The next-generation water Cherenkov experiment Hyper-Kamiokande (HK) includes a rich long-baseline neutrino oscillation component. This will make use of a 1.3MW proton beam from J-PARC, coupled with a suite of near detectors, including an upgraded ND280 and a new Intermediate Water Cherenkov Detector (IWCD). The 185 kton fiducial mass Hyper-Kamiokande will be used for the far detector. The high beam power and this large fiducial mass will provide the statistics necessary for precise determination of the atmospheric mass splitting, Delta m^2_23, mixing angle theta_23, and the neutrino CP violating phase delta_CP. Such measurements have the potential to become systematically limited over the course of HK's running period. The impact of systematic uncertainties on the oscillation sensitivity will be discussed, along with the potential to minimise this impact with near-detector measurements.

Speaker: Charlie Naseby

HK_LBL_Sensitivity_NuFACT.pdf

179 Prospects of Neutrino mass ordering with supernova neutrinos in the upcoming long-baseline experiments

In this paper we study the possibility of determining the neutrino mass ordering sensitivity from the future supernova neutrino events at the DUNE and T2HK detectors. We estimate the expected neutrino event rates from a future supernova explosion assuming GKVM flux model corresponding to different processes that are responsible for detecting the supernova neutrinos at these detectors. We present our results in the form of $\chi^2$, as a function of supernova distance. For a systematic uncertainty of 5\%, our results show that, the neutrino mass ordering can be determined at $5 ~\sigma$ C.L. if the supernova explosion occurs at a distance of 44 kpc for T2HK and at a distance of 6.5 kpc for DUNE. Our results also show that the sensitivity of T2HK gets affected by the systematic uncertainties for the smaller supernova distances. Further, we show that in both DUNE and T2HK, the sensitivity gets deteriorated to some extent due to presence of energy smearing of the neutrino events. This occurs because of the reconstruction of the neutrino energy from the energy-momentum measurement of the outgoing leptons at the detector.

Speaker: Papia Panda

presentation.pdf

180 Update on solar oscillations at Super-Kamiokande.

Super-Kamiokande, a 50 kton water Cherenkov underground neutrino detector, has been instrumental in studying neutrinos across a wide energy range, from a few MeV to hundreds of GeV. Alongside SNO, Super-Kamiokande has played a pivotal role in providing evidence for solar neutrino oscillations. Specifically, the detection of Boron-8 neutrinos highlighted the deficit in the observed neutrino flux compared to the predictions of solar models. Since then, the Super-Kamiokande collaboration has been regularly sharing updates on various signatures and parameters related to solar oscillations. Most notably, the exclusion of other oscillation parameters, particularly the Small Mixing Angle and vacuum oscillations, and the evidence supporting the Large Mixing Angle solution, as well as the day/night flux difference attributed to the earth's matter electro-neutrino regeneration in the Earth. This presentation will provide an overview of the latest advancements in solar oscillations at Super-Kamiokande.

Speaker: Lluis Marti

0-Marti-Solar.pdf

181 Reactor Antineutrino Oscillations with JUNO

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector scheduled to come online in 2024 with a main physics goal of precisely measuring reactor antineutrino oscillations. JUNO is located at a distance of 53 km from eight nuclear reactors in Southern China. The detector will be instrumented by 17,612 20-inch and 25,600 3-inch photomultiplier tubes, resulting in over 75% photocoverage. This design alongside a careful control of systematics is expected to achieve a 3% energy resolution at 1 MeV, allowing a measurement of $sin^2\Theta_{12}$, $\Delta m^2_{21}$, and $\Delta m^2_{32}$ to sub-percent precision. Furthermore, JUNO will be able to determine the neutrino mass ordering to 3$\sigma$ with ~6 years of data-taking. This talk will describe JUNO’s expected measurements in neutrino oscillations with reactor antineutrinos and report the most recent sensitivities.

Speaker: Roberto Mandujano

NuFact_2023_Antinu_JUNO.pdf

parallel (room#102): no session

182 no session

parallel (room#103): no session

183 no session

parallel (room#301): #6 - WG2

Convener: Dr Elena Gramellini (University of Manchester)

184 A Scattering and Neutrino Detector at the LHC (SND@LHC)

SND@LHC is a compact and stand-alone experiment to perform measurements with neutrinos produced at the LHC in a hitherto unexplored pseudo-rapidity region of 7.2 < 𝜂 < 8.6, complementary to all the other experiments at the LHC. The experiment is located 480 m downstream of IP1 in the unused TI18 tunnel. The detector is composed of a hybrid system based on a 800 kg target mass of tungsten plates, interleaved with emulsion and electronic trackers, followed downstream by a calorimeter and a muon system. The configuration allows efficiently distinguishing between all three neutrino flavours, opening a unique opportunity to probe physics of heavy flavour production at the LHC in the region that is not accessible to ATLAS, CMS and LHCb. This region is of particular interest also for future circular colliders and for predictions of very high-energy atmospheric neutrinos. The physics programme includes studies of charm production, and lepton universality tests in the neutral sector. The detector concept is also well suited to searching for Feebly Interacting Particles via signatures of scattering in the detector target. The first phase aims at operating the detector throughout LHC Run 3 to collect a total of 250 fb−1. The experiment was recently installed in the TI18 tunnel at CERN and has collected its first data in 2022. A new era of collider neutrino physics has started.

Speaker: Yeong Gyun Kim (Gwangju National University of Education)

SND@LHC(2023NuFACT).pdf

SND@LHC(2023NuFACT).pptx

185 Operation and results of the FASERnu detector

FASER, the ForwArd Search ExpeRiment, at the CERN LHC, is designed to search for new, light, weakly-interacting particles, and investigate high-energy collider neutrino interactions in the TeV regime, extending current cross-section measurements. Located $480$ m downstream from the ATLAS IP, it is aligned with the collision axis line-of-sight, covering a previously unexplored pseudorapidity range of $\eta > 8.8$. In March 2023, the FASER collaboration announced the first direct observation of neutrino interactions at a particle collider experiment using the active electronic components of the FASER detector. FASER is composed of a main electronic detector, sitting behind the passive FASER$\nu$ neutrino detector, made up of 730 alternating emulsion films and tungsten plates, resulting in a 1.1 tonne target mass. The FASER$\nu$ detector achieves sub-micron position resolution, allowing for all three neutrino flavours to be distinguished by their vertex topology in CC interactions. Due to the track occupancy in emulsion, three data-taking periods are carried out per year, each module requiring assembly and development campaigns. FASER plans to run throughout the LHC Run3, collecting $250$ fb$^{-1}$ of data. In this presentation, recent FASER results, as well as the status of data taking and analysis for FASER$\nu$, will be presented.

Speaker: Jeremy Atkinson (Universitaet Bern (CH))

JAtkinson_NuFACT2023_ObservationAndResultsOfTheFASERnuDetector.pdf

186 Current Status and Results from the NINJA Experiment

The NINJA collaboration aims to study neutrino-nucleus interactions in the energy range of hundreds of MeV to a few GeV using an emulsion-based detector. A series of neutrino-nucleus interaction measurements was conducted using the emulsion detector with water and iron targets in the near detector hall of the T2K experiment at J-PARC. The emulsion detector is suitable for precision measurements of charged particles produced in neutrino interactions with a low momentum threshold, especially low momentum protons as low as 200$\,$MeV/$c$, thanks to its thin-layered structure and sub-$\mu$m spatial resolution. Multiplicities and kinematics of muons, charged pions and protons were measured and some significant differences between the data and Monte Carlo prediction were observed. In this talk, current status and the results from the NINJA experiment will be presented.

Speaker: Hitoshi Oshima (ICRR, the University of Tokyo)

NuFACT2023_NINJA_HitoshiOshima.pdf

187 ANNIE: the Accelerator Neutrino Neutron Interaction Experiment

The Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is a Gadolinium-loaded water Cherenkov detector placed in the Booster Neutrino Beam (BNB) at the Fermi National Accelerator Laboratory, USA. The primary physics goal of ANNIE is to perform neutrino cross-section measurements that will constrain systematic uncertainties in the next generation of long-baseline neutrino experiments. The first measurement will be the multiplicity of final-state neutrons from neutrino-nucleus interactions in water. Alongside these measurements, ANNIE has achieved the first ever deployments of two novel detector technologies in a neutrino beam: Large Area Picosecond Photodetectors (LAPPDs) and Water-based Liquid Scintillator (WbLS). LAPPDs are micro-channel-plate-based devices that provide timing resolution of ~100 picoseconds and sub-centimeter spatial resolution. WbLS combines the low attenuation and Cherenkov production of pure water with the high light-yield and low detection threshold of liquid scintillator. This talk will discuss the status of ANNIE's physics and R&D measurements.

Speaker: Andrew Sutton

2023-08-25_ANNIE_ASutton.pdf

188 Study of Neutrino Interactions by the COHERENT collaboration

COHERENT collaboration at the Spallation Neutrino Source (SNS) at ORNL utilizing intensive low energy neutrino flux to measure various neutrino interactions. Range of interest is from Coherent Elastic Neutrino Scattering (CEvNS) up to nuclear charge current and neutral current interactions of interest for the support of Supernova neutrino detection in large detectors. We will review present status, latest results, and future plans of the collaboration. We will discuss perspectives of expansion as well the existing neutrino program at the SNS in the near future.

Speaker: Yuri V Efremenko

Efremenko_COHERENT_NuFact23.pdf

189 T2K Neutrino Cross Section Measurements

Precise knowledge of how neutrinos interact with matter is essential for measuring neutrino oscillations in long-baseline experiments. At T2K, the near detector complex measures neutrino interactions to constrain cross-section models for oscillation studies and to characterise the beam flux. The near detector complex provides a platform for performing neutrino-nucleon cross section measurements. The design of the ND280 near detector allows for a variety of cross section measurements on different targets to be performed. The additional WAGASCI near detector at a different off-axis angle features an increased Water/Carbon target ratio. Finally, the on-axis INGRID detector can be combined with ND280 and WAGASCI to measure the cross-section at different neutrino energies and to further constrain the nuclear models for different targets.

Recent cross section measurements from the near detector complex will be presented. The latest measurements of pion production in ND280, including measurements of transverse pion kinematics, and an improved analysis of coherent pion production making use of an anti-neutrino sample for the first time, will be shown. The first measurement of cross section without pions in the final state at the WAGASCI off-axis angle will be presented, as well as the first combined measurement of ND280 and INGRID allowing the first simultaneous measurement of cross-section at different neutrino off-axis angles, energies and different detectors on the same flux.

Speaker: Lukas Koch (Johannes Gutenberg Universitaet Mainz (DE))

T2K-cross-section-measurements.pdf

parallel (room#302): #6 - WG5

Convener: koun choi (IBS)

190 Recent Results on Indirect Dark Matter Searches with IceCube

Although the existence of dark matter has been well established by numerous observations, its nature remains unknown. Dark Matter could be detected indirectly through the observation of neutrinos produced in self-annihilations or decays of dark matter. Objects with large dark matter accumulations such as galaxy clusters or the Galactic dark matter halo are primary targets. Searches for such signals conducted with the IceCube Neutrino Telescope have resulted in some of the most stringent constraints on the lifetime of dark matter in particular in the TeV - PeV mass range. We present searches for neutrinos from dark matter decay with IceCube, that are conducted in a model independent way assuming a 100% branching ratio into a pair of Standard Model particles. The decay channels considered for these works include $\nu\bar{\nu}$, $\tau^{+}\tau^{-}$, $W^{+}W^{-}$, $b\bar{b}$. Current constraints and sensitivities are reviewed.

Speaker: Minjin Jeong (Sungkyunkwan University)

NuFact2023_DM_searches_with_IceCube.pdf

191 Dirac-Majorana neutrino type conversion induced by an oscillating scalar dark matter

Some properties of a neutrino may differ significantly depending on whether it is Dirac or Majorana type. The type is determined by the relative size of Dirac and Majorana masses, which may vary if they arise from an oscillating scalar dark matter. We show that the change can be significant enough to convert the neutrino type between Dirac and Majorana while satisfying constraints on the dark matter. It predicts periodic modulations in the event rates in various neutrino phenomena. As the energy density and, thus, the oscillation amplitude of the dark matter evolves in the cosmic time scale, the relative size of Dirac and Majorana masses changes accordingly. It provides an interesting link between the present-time neutrino physics to the early universe cosmology including the leptogenesis. This talk is based on the recent paper (arXiv:2305.16900) by YeolLin ChoeJo, Yechan Kim, and Hye-Sung Lee.

Speaker: Yechan Kim (KAIST)

Neutrino Type Oscillation (NuFACT2023).pdf

192 New Physics searches using ProtoDUNE and the CERN SPS accelerator

The exquisite capabilities of liquid Argon Time Projection Chambers make them ideal to search for weakly interacting particles in Beyond the Standard Model scenarios. Given their location at CERN the ProtoDUNE detectors may be exposed to a flux of such particles, produced in the collisions of 400 GeV protons (extracted from the Super Proton Synchrotron accelerator) on a target. Here we point out the interesting possibilities that such a setup offers to search for both long-lived unstable particles (Heavy Neutral Leptons, axion-like particles, etc) and stable particles (e.g. light dark matter, or millicharged particles). Our results show that, under conservative assumptions regarding the expected luminosity, this setup has the potential to improve over present bounds for some of the scenarios considered. This could be done within a short timescale, using facilities that are already in place at CERN, and without interfering with the experimental program in the North Area.

Speaker: salvador urrea (Instituto de Física Corpuscular(IFIC) Valencia, Spain)

protodune_sps_NUFACT2023.pdf

193 Physics Opportunities at a PIP-II Beam Dump Facility and Beyond

The accelerator complex at Fermilab is currently undergoing improvements which will increase the available beam power to the complex and is known as Proton Improvement Plan-II (PIP-II). The PIP-II Linac is slated for operation near the end of this decade and will be the main proton driver for Fermilab experiments moving forward and provide the beam to LBNF/DUNE. However, the DUNE physics program requires only ~1% of the available protons provided by PIP-II. The Accelerator Complex Enhancement, or ACE, will provide further upgrades in the 2030s in the form of increased power to LBNF along with a replacement for the Fermilab Booster which could also include an accumulator ring. A workshop was recently held at Fermilab in order to explore the physics possible when PIP-II is coupled with a fixed target or beam dump. The beam dump scenario provides an exciting opportunity to search for dark sector physics across detector threshold energy scales with examples being accelerator-produced dark matter, active-to-sterile neutrino oscillations, millicharged particles, and axion-like particles, which can be produced in the proton collisions with a fixed target. Additionally, experiments located at a PIP-II facility that is coupled to an accumulator ring would also be able to study coherent elastic neutrino-nucleus scattering, or CEvNS. In this talk, I will summarize the physics possible at a PIP-II beam dump facility and sensitivities to different dark sector physics and other beyond the Standard Model searches with detector concepts spanning from an eV-scale to MeV-scale detection threshold.

Speaker: Jacob Zettlemoyer

JCZ_NuFACT2023_FNALDS.pdf

194 Beyond the Standard Model Searches with the Short Baseline Near Detector

The Short-Baseline Near Detector (SBND) is a 112-ton liquid argon time projection chamber (LArTPC) detector located 110-meters downstream the Booster Neutrino Beam target at Fermilab. As the near detector of the Short-Baseline Neutrino Program, SBND is especially sensitive to any new particles produced in the beam. In addition to the excellent spatial and energy resolution of the LArTPC technology, SBND features photon detection and cosmic–ray tagger systems achieving ns-time resolution. In this talk, we will review SBND’s capabilities and prospects for searches for Beyond Standard Model physics such as heavy neutral leptons, sub-GeV dark matter, and dark neutrinos.

Speaker: Xiao Luo

BSM_SBND.pdf

parallel (room#303): #6 - WG4

Convener: Simon Corrodi

195 Search for a muon EDM at PSI using the frozen-spin technique

Permanent electric dipole moment (EDM) of a fundamental particle breaks both parity (P) and time-reversal (T) symmetries, implying the violation of charge-parity (CP) symmetry, assuming CPT invariance. With the current experimental sensitivities, an observation of a non-zero muon EDM would indicate new CP violating sources from physics beyond the Standard Model. The experiment at the Paul Scherrer Institute (PSI) will search for the muon EDM employing the frozen-spin technique for the first time. The muons will orbit in a solenoid storage ring with the radial electric field applied such that it cancels the g-2 precession. A non-zero EDM would result in the muon spin precession in the plane orthogonal to the muon motion and the signal would manifest as the upstream-downstream (with respect to the magnetic field) asymmetry in the decay positron counts versus time. The experiment is expected to reach the sensitivity of $6\times 10^{-23} e$ cm using $p=125$ MeV/c muons, thus improving the current direct limit by more than three orders of magnitude. This talk will summarize the principle, current status and timeline of the experiment at PSI.

Speaker: Ljiljana Morvaj (Paul Scherrer Institute (CH))

NuFact2023_MuEDM.pdf

196 Muonium and Muonic Helium Hyperfine Structure Precision Measurements at J-PARC MUSE

At the J-PARC Muon Science Facility (MUSE), the MuSEUM collaboration is planning new measurements of the ground state hyperfine structure (HFS) of both muonium and muonic helium atom.
Muonium (a bound state of a positive muon and an electron) and muonic helium (a helium atom with one of its electrons replaced by a negative muon) are both hydrogen-like atoms. Their respective ground-state HFS results from the interaction of the electron and the muon magnetic moment, and they are very similar but inverted because of the different signs of their respective muon magnetic moments. High-precision measurements of the muonium ground-state HFS are recognized as the most sensitive tool for testing bound-state quantum electrodynamics (QED) theory to precisely probe the Standard Model [1] and determine fundamental constants of the positive muon magnetic moment and mass. The same technique can also be employed to measure muonic helium HFS and obtain the negative muon magnetic moment and mass. Moreover, muonic helium HFS is also a sensitive tool to test and improve the theory of the three-body atomic system.
The MuSEUM collaboration already performed HFS measurements at zero magnetic field at MUSE D-line of both muonium and muonic helium atom, with results more accurate than previous measurements [2-4]. High-field measurements are now in preparation at the MUSE H-line, using ten times more muon beam intensity than at the D-line, and with decay positrons/electrons being more focused on the detector due to the high magnetic field, we aim at improving the accuracy of previous measurements by ten times for muonium and hundred times or more for muonic helium. Furthermore, a new experimental approach to recover the negative muon polarization lost during the muon cascade process in helium is being investigated by repolarizing muonic helium atoms using a spin-exchange optical pumping (SEOP) technique [5], which would drastically improve the measurement accuracy, and where a direct improvement by a factor of ten may be realized. An overview of the different features of these new HFS measurements and the latest results will be presented.

[1] M. I. Eides, Phys. Lett. B 795, 113 (2019)
[2] S. Kanda et al., Phys. Lett. B 815, 136154 (2021)
[3] S. Nishimura et al., Phys. Rev. A 104, L020801 (2021)
[4] S. Fukumura et al., EPJ Web Conf. 262, 01012 (2022)
[5] A. S. Barton et al., Phys. Rev. Lett. 70, 758 (1993)

Speaker: Patrick Strasser (KEK)

Strasser_NuFact2023_WG4.pdf

197 Recent LFV Results From CMS

Several experimental observations lead to the availability of lepton-flavor violating(LFV) processes, which is also thoroughly examined by the CMS experiment. In this presentation, several recent LFV results from CMS within different sectors are presented.

Speaker: Youngwan Kim (Seoul National University (KR))

LFVinCMS_NuFACT2023_YoungwanKim_v4.pdf

198 Recent results on flavour physics

In this talk, I will present recent results with heavy flavour decays at the LHCb experiment. Future prospects will be highlighted in view of the recent start of Run 3 of the LHC. In particular, I will focus on searches for new physics and tests of lepton flavour universality that are particularly sensitive to the presence of physics beyond the Standard Model.

Speaker: Francesca Dordei (INFN, Cagliari (IT))

dordei.pdf

Saturday 26 August

Plenary: Plenary C : WG summary (room#101, relay broadcasting at room#102)

Convener: Prof. Jianming Bian (University of California Irvine (US))

199 Summary WG 1: Oscillation

Speaker: Adam Aurisano (University of Cincinnati)

wg1SummaryNuFact2023.pdf

200 Summary WG 2: Scattering

Speaker: Christophe Bronner

WG2_summary.pdf

201 Summary WG 3: Accelerator

Speaker: Natalia Milas (European Spallation Source)

WG3Summary_NuFact23_v2.pdf

WG3Summary_NuFact23_v2.pptx

202 Summary WG 4: Muon

Speakers: Yuki Fujii (Monash University (AU)), Yuki Fujii

NuFact2023WG4Summary.pdf

203 Summary WG 5: Beyond PMNS

Speaker: koun choi (IBS)

nufact2023_wg5_summary_koun.pdf

204 Summary WG 6: Detector

Speaker: Yasuhiro NISHIMURA (Keio University)

20230826_NUFACT2023WG6summary_Nishimura_red.pdf

205 Summary WG 7: IDEEO

Speaker: Francesca Dordei (INFN, Cagliari (IT))

WG7_summary_dordei.pdf

10:50 Coffee Break (coffee table at room#102)

Plenary: Plenary D : closing (room#101, relay broadcasting at room#102)

Convener: Prof. Jonghee YOO (Seoul National University)

206 Prospect of the Neutrino Physics

Speaker: Kevin McFarland (University of Rochester)

NuFact23 Prospect McFarland.pdf

207 LOC: Poster Award

Speaker: Prof. Siyeon Kim

208 LOC: Closing Remark and Announcement of NuFACT24

Speaker: Prof. Jonghee YOO (Seoul National University)

NuFact2023YooClosing.pdf