The COHERENT Collaboration is continuing its efforts to measure CEvNS and inelastic neutrino interactions at Oak Ridge National Laboratory’s Spallation Neutron Source. This presentation will include an overall summary of COHERENT’s efforts as the Collaboration transitions from first-light CEvNS observations to precision measurements with larger-mass detector systems and a power-upgraded SNS....
I will present the current status of the experiment GanESS and the GaP proptotype, an effort to detect Coherent Elastic Neutrino-Nucleus Scattering (CEνNS) at the European Spallation Source (ESS), utilizing high-pressure Time Projection Chambers (TPCs) as the detection technology. The use of high-pressure noble gas TPCs allows for very good energy resolution and sub-keV thresholds,...
The CICENNS (CsI detector for Coherent Elastic Neutrino Nucleus Scattering) experiment aims to construct a CsI(Na) detector array with total mass of 300 kg, located at the China Spallation Neutron Source (CSNS), for the precise measurement of CEvNS signals. I will present the plan, status, and physics goals of CICENNS in this talk.
A precise characterization of CEνNS in the fully coherent regime will have important implications both in the search for new physics and in technological applications. To this aim, the NUCLEUS experiment will exploit the two reactor cores of the Chooz-B nuclear power plant in France as neutrino sources, and cryogenic calorimeters made of CaWO$_4$ and Al$_2$O$_3$ crystals read out by TES as...
The CRAB (Calibrated nuclear Recoils for Accurate Bolometry) project is aimed at precise calibration of cryogenic detectors at sub-keV nuclear recoil energies, addressing key challenges in coherent neutrino scattering and low-mass dark matter detection.
After the successful validation of the method, demonstrated by the detection of recoil peaks in cryogenic detectors exposed to a commercial...
BULLKID is a novel detector concept based on an array of particle absorbers sensed by multiplexed Kinetic Inductance Detectors (KIDs). The aim of this detector is to control the backgrounds by creating a fully active structure and by applying fiducialization
techniques.
Following the encouraging results from a 20 g prototype detector,
here we present the first operation of 3-wafer...
In this talk I will discuss some implications of the first indication of nuclear recoils from solar neutrinos on a xenon target at direct detection experiments. By analyzing data from the XENONnT and PandaX-4T experiments, I will present the first constraints on new interactions and neutrino electromagnetic properties from the first CEνNS data using solar 8B neutrinos.
Coherent Elastic Neutrino-Nucleus Scattering (CEνNS) is a powerful tool for probing both Standard Model (SM) and beyond-SM (BSM) physics. The remarkable CEνNS observations from the CONUS+ collaboration at nuclear reactors using a germanium target explore the fully coherent regime at unprecedentedly low energies, where nuclear structure uncertainties play a marginal role.
This talk presents...
The directions of low energy nuclear recoils open windows into previously unprobed areas of physics. Specifically, directional detection of coherent elastic neutrino nucleus scattering (CEνNS) would probe for new, beyond-the-standard-model (BSM) gauge bosons involved in that interaction as well as provide a tool for distinguishing between dark matter and neutrino scattering. Currently the only...
The NEWS-G3 experiment aims at the detection of reactor neutrinos using a 60cm-diameter Spherical Proportional Counter (SPC) at high pressure. The low energy threshold down to single-electron detection and the electron-counting capabilities, allow for the detection of low energy nuclear recoils, with an estimated event rate of 5 events/bar/day/GW in argon at 20m from the reactor core....
Coherent CAPTAIN-Mills (CCM) is a 10 ton liquid argon scintillation detector at Los Alamos National Laboratory for the study of neutrino and beyond Standard Model physics. It is located 23 m from the stopped pion source of the Lujan Facility, and will receive $1.5\times 10^{22}$ POT in its ongoing 3-year run cycle. CCM is instrumented with 200 8-inch PMTs, of which $80\%$ are coated with...
The Coherent Neutrino Nucleus Interaction Experiment (CONNIE) aims to detect, for the first time, coherent elastic antineutrino-nucleus scattering (CEvNS) in silicon and probe physics beyond the Standard Model. To that end, the experiment has been taking data next to the Angra 2 nuclear power plant since mid-2021 with high-sensitivity detectors known as Skipper-CCDs. These pixelated sensors...
The COherent Neutrino-Nucleus Interaction Experiment (CONNIE) investigates coherent elastic neutrino-nucleus scattering (CEvNS) using high-resistivity silicon Skipper-CCDs at the Angra-2 nuclear reactor in Brazil. The introduction of Skipper-CCD technology has enabled an unprecedented low-energy threshold of 15 eV, significantly improving sensitivity to low-energy events and rare interactions....
In this work we present a study of Coherent Elastic Neutrino-Nucleus Scattering (CEvNS) with a proposed array of isotopic enriched detectors. These detectors could improve the precision of CEvNS measurements, allowing to test predictions of the Standard Model, nuclear physics and new physics scenarios, due to the correlation of the systematic uncertainties. Based on these results, we explore...
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) operates at the Angra 2 Nuclear Reactor in Brazil. Using silicon Skipper-CCDs, CONNIE aims to identify and investigate coherent elastic neutrino-nucleus scattering (CE$\nu$NS). However, background particles from various sources, combined with the large volume of data, present significant challenges, making manual analysis of...
The Ricochet experiment is an international collaboration that aims at detecting the CEvNS process using germanium crystal calorimeters at cryogenic temperatures. The detectors can simultaneously readout the ionization and heat energies following particle interactions occurring in the crystal. This dual measurement allows to both perform particle identification, i.e. to discriminate between...
Future experiments dedicated to the detection of Coherent Elastic Neutrino-Nucleus Scattering may be powerful tools in probing light new physics. In this paper we study the sensitivity on light Z′ mediators of two proposed experiments: a directional low pressure Time Projection Chamber detector, νBDX-DRIFT, that will utilize neutrinos produced at the Long Baseline Neutrino Facility, and...
The quenching factor in silicon is a fundamental parameter for particle physics experiments that detect nuclear recoils. This is particularly critical for experiments employing CCD sensors as target materials—such as CONNIE and Atucha—which rely on it to convert ionization signals into nuclear recoil energies. Its importance extends beyond neutrino detection, playing a central role in dark...
After the detection of CE$\nu$NS, the COHERENT collaboration is exploring new physics by precisely measuring the process. However, the uncertainty of the neutrino flux normalization is limiting the precision. To reduce the uncertainty, a heavy water (D$_{2}$O) detector has taken data at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL) since 2023. By utilizing the...
We present nuclear structure calculations adopting a novel hybrid nuclear model, combining the nuclear shell model and the microscopic quasiparticle-phonon model [1]. The predictivity of the hybrid model is tested by computing inelastic neutral-current neutrino-nucleus scattering cross sections off the stable thallium isotopes, taking also into account the effect of nuclear recoil energy. The...
We demonstrate that CEνNS measurements at spallation sources are valuable probes of muon-decay physics. Using COHERENT data we derive the first constraint on the Michel parameters governing the $\bar\nu_\mu$ energy distribution. We also discuss future sensitivities and assess the implications for the Lorentz structure of the interactions mediating muon decay. Talk based on 2502.18175 and ongoing work.
We will present a retrospective account of the TEXONO program on coherent neutrino nucleus scattering at the Kuo-Sheng Reactor Neutrino Laboratory in Taiwan with sub-keV germanium ionization detectors [1]. The latest limits [2] and the various spinoff-impacts [3] will be discussed. We would provide updates on quantifying the quantum-mechanical coherency effects of the interactions [4]....
The RECODE (Reactor neutrino COherent scanning Detection Experiment) uses two sets of high-purity germanium arrays to accurately measure the CEvNS process of reactor neutrinos. The high-purity germanium technology used comes from the PPC germanium detector technology developed by CDEX in dark matter experiments. The currently confirmed experimental site is located at Sanmen Nuclear Power Plant...
The talk will cover latest results of the CONUS+ experiment. In addition the current status, an outlook and the physics perspectives will be covered.
The $\nu$GeN experiment is aimed to studying neutrino properties in the close vicinity of the reactor core of the Kalinin Nuclear Power Plant (KNPP) at Udomlya, Russia. The experimental setup is installed under reactor unit #3 of KNPP at the moving platform, which allows changing the distance from the center of the 3.1 GW$_{th}$ core from 11.1 to 12.2 m. In this way, we obtain an enormous...
For a successful CEvNS detection, a detector with a low enough noise threshold is required. HPGe spectrometers are highly suitable for this task due to the large number of charge carriers created in particle interactions, the high level of radiopurity that can be achieved and the possibility to have kg-sized detector masses. The developments in the last decades on noise levels make it feasible...
In neutrino oscillation physics numerous exact degeneracies exist under the name LMA-Dark. These degeneracies make it impossible to determine the sign of $\Delta m^2_{31}$ known as the atmospheric mass ordering with oscillation experiments alone in the presence of new neutrino interactions. The combination of different measurements including multiple oscillation channels and neutrino...
With the rapid advancement of low-energy neutrino experiments, coherent elastic neutrino-nucleus scattering (CE$\nu$NS) has become a powerful tool for precision studies in both Standard Model (SM) and beyond-the-Standard-Model physics. I will present our recent works based on recent and projected phenomenological studies of CE$\nu$NS at two key facilities: the CONUS+ reactor experiment |1| and...
In the last years, the long predicted Standard Model reaction channel of coherent elastic neutrino-nucleus scattering (CEvNS) has been confirmed by measurements of (anti-)neutrinos emitted from pion decay at rest sources and nuclear reactors, also with multiple target materials. As we slowly transition with the next generation of experiments from first observations to precision measurements,...
Solar neutrinos interacting with nuclei in dark matter detectors through coherent elastic neutrino-nucleus scattering (CEvNS), often referred to as the 'neutrino fog,' presents a significant challenge to direct DM detection efforts. The XENONnT detector, known for its large exposure and low background, offers an exceptional opportunity to investigate this interaction. Utilizing data from...
The detection of solar neutrinos via coherent elastic neutrino-nucleus scattering (CEvNS) in liquid xenon time projection chambers (TPCs) represents a major milestone in neutrino physics, offering a new lens into the cosmos. Over the past two decades, liquid xenon TPCs have driven dramatic progress in rare-event detection. In particular, the LUX-ZEPLIN (LZ) experiment, operating a two-phase...
Core-collapse Supernovae (SN) release nearly all their binding energy as neutrinos. RES-NOVA tackles a major challenge in astroparticle physics by introducing a novel detection approach using cryogenic detectors made from ultra-pure archaeological lead (Pb). The innovation lies in exploiting Coherent Elastic Neutrino-Nucleus Scattering (CEvNS), which offers a cross-section ~10⁴ times larger...
The CONNIE experiment began operating with Skipper-CCDs in 2021, marking the first use of Skipper technology in a reactor neutrino experiment. This technology enables charge measurements with sub-electron resolution, enhancing the ability to detect and characterize low-energy signals. As a result, the experiment achieved a detection threshold as low as 15 eV. Data collected with exposures of...
The neutrino-nucleus coherent scattering (CEνNS), known as CEνNS, has the largest cross-section among all interaction channels for MeV neutrinos, making it the most promising way to remotely monitor nuclear reactors. A precise determination of the CEvNS cross section has a significant impact on understanding the properties of neutrinos and constraining new physics beyond the standard model....
This presentation will detail the latest advancements in the development and characterization of a 6.6 kg proto-type CryoCsI detector, comprising two 3.3 kg cesium iodide (CsI) crystals operated at around 90K. Key performance metrics of the detector, including light yield optimization, spatial uniformity of signal response, and long-term stability under sustained cryogenic conditions, will be...
The detection of CEvNS from reactor sources represents a unique opportunity to test beyond the Standard Model physics in the neutrino sector. In this talk, we present the phenomenological implications of the first CONUS+ observation of CEvNS for different new physics scenarios, including non-standard interactions, electromagnetic properties of neutrinos and light mediators. The results...
As direct detection experiments approach sensitivities where neutrinos become an irreducible background due to their interactions via coherent elastic neutrino-nucleus scattering (CEvNS), they pose a fundamental limitation in the search for Dark Matter. Given that CEvNS has only recently been observed, there remains significant room for new physics beyond the Standard Model (BSM) to alter the...
Understanding ionization efficiency at energies below 1 keV, both in pure crystals and in noble liquid detectors, provides an essential analytical tool for accurate measurements of Coherent Elastic Neutrino-Nucleus Scattering (CEvNS) and the processes involved in the search for dark matter. This presentation will address theoretical concepts related to the Lindhard integral equation and the...
The detection of nuclear recoils caused by elastic coherent scattering of solar and reactor neutrinos is of significant scientific and practical importance, representing a key milestone in the direct search for dark matter particles. While modern detectors are sensitive to registering these small energy depositions, a challenge lies in discriminating particle interactions from energy...
In 2015, the COHERENT collaboration attempted to measure the electron-neutrino charged current (CC) cross-section on lead. The Eljen cell and the Neutrino Cubes detectors hunted for the Neutrino Induced Neutrons (NINs) produced by this process. The results indicated a surprisingly small cross-section — less than one third of the predicted signals were observed. Understanding the NINs...
The Coherent CAPTAIN-Mills (CCM) experiment, located at Los Alamos National Laboratory, employs a 10-ton liquid argon detector to study neutrino interactions, search for dark matter candidates, and explore physics beyond the Standard Model.
In this work, we present ongoing efforts towards enabling the first measurement of low-energy charged-current (CC) scattering of electron neutrinos on...
For the CE$\nu$NS experiments that we are developing at the Donostia International Physics Center (DIPC), it is essential to characterize the neutrons produced at the facility. The European Spallation Source (ESS) being one of the promising experimental facilities for the observation of CE$\nu$NS, detailed simulations of the neutron background at the ESS have been performed. However, as in...
I will discuss a few aspects of electroweak theory relevant for neutrino scattering on different targets. The presentation will follow historical developments starting with the discovery of the neutron, the establishment of Fermi beta theory and finishing with the SM electroweak sector. A few aspects of effective theories will be covered. And an explicit calculation of the CEvNS cross section,...
This three-lecture series will explore the construction and interpretation of confidence intervals within the context of particle physics. We will begin by defining the likelihood function and highlighting its central role in statistical inference. Through a concrete example, we will examine how the likelihood depends on the number of observed events, with special attention to the challenges...
In these lectures, I will discuss key milestones in neutrino physics, from the first detections to current large-scale experiments like DUNE. I will then present the main detector technologies used in neutrino research and the background challenges they face. Finally, I will review a decade of CEvNS experiments, from COHERENT to recent developments in CONUS.
Sterile neutrinos that couple to the Standard Model via the neutrino magnetic dipole portals have been extensively studied at various experiments. In this work, we scrutinize these interactions for sterile neutrinos in the mass range of 0.1--50 MeV through the nuclear and electron recoils at various neutrino scattering experiments. For the e-flavor specific dipole portal, we demonstrate that...
In the first part of this project nuclear form factor parametrizations will be discussed. That discussion will then be followed by the determination of neutrino fluxes from pion decay-at-rest and from nuclear reactors. The final part of the project will involve a full numerical implementation of the CEvNS cross section and the calculation of the event rate in both, fixed target and reactor facilities.
This two-session course will provide an in-depth exploration of Skipper-CCD detector performance and the techniques used to analyze their data. We will begin by reviewing the concept of noise in CCD detectors and how the Skipper architecture enables significant improvements in readout noise. Participants will learn how to quantify this noise using real images. We will then survey the various...
