The Mitchell Conference on Collider, Dark Matter, and Neutrino Physics 2025

May 13, 2025, 8:00 AM → May 16, 2025, 9:00 PM America/Chicago

Hawking Auditorium (Mitchell Institute, Texas A&M University)

In association with the Physics Department at Sam Houston State University, the 2025 Mitchell Conference on Collider, Dark Matter, and Neutrino Physics will be held on May 13-16 at the George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University. The conference will focus on recent developments in the fields of colliders, dark matter, and neutrino physics. The conference will be attended by experimental and theoretical experts from these fields, and plenty of time will be allocated for interaction, discussion, and collaboration.

Venue
Texas A&M University, College Station, Texas
Mitchell Institute (MIST), Hawking Auditorium

Internet Access
Guest internet instructions will be provided with your welcome packet. Some guests have had connectivity issues in the past, so we highly recommend that you set up Eduroam if your home institution supports it. The setup requires an internet connection, so it needs to be done beforehand. Once done it will allow you hassle-free internet access at more than 400 academic institutions around the US. Please contact your IT support for assistance.

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Organizers
Amanda Kabella (Admin)

James Dent

Bhaskar Dutta

Isabelle Goldstein

Teruki Kamon

Kevin Kelly

Mudit Rai

Deepak Sathyan

William Shepherd

Louis Strigari

Joel Walker

Tue, May 13

8:00 AM → 8:45 AM Breakfast

8:45 AM → 9:00 AM Welcome: Welcome/Introduction

Welcome & Introductions

Convener: Kevin Kelly (Texas A&M University)

Mitchell_Intro_2025.pdf

9:00 AM → 10:32 AM Tuesday Morning Session 1

Convener: Kevin Kelly (Texas A&M University)

9:00 AM The Neutrino Slice at Muon Colliders

Speakers: Zhen Liu (University of Minnesota (US)), Zhen Liu

1_MuC_NeutrinoSlice.pdf

9:23 AM The Landscape of Dark Compact Object Interactions with Stars

Speaker: Kuver Sinha (University of Oklahoma)

Sinha_Mitchell_2025.pdf

9:46 AM Geometry and energy in EFT

Speaker: Benoit Assi (Fermilab)

Texas_AM_2025_Ben_Assi.pdf

10:09 AM Clash of the Titans: ultra-high energy KM3NeT event versus IceCube data

In this talk I will discuss the recent detection of an ultrahigh energy neutrino at KM3NeT and its interplay with the non-observation at IceCube.

Speaker: Pedro Machado (Fermilab)

2025 - Mitchell - Machado.pdf

10:32 AM → 11:00 AM Coffee

11:00 AM → 12:32 PM Tuesday Morning Session 2

Convener: Dr Deepak Sathyan

11:00 AM Does the 220 PeV Event at KM3NeT Point to New Physics?

Speaker: Vedran Brdar (Oklahoma State University (US))

Vedran.pdf

11:23 AM ‘Dark' Matter Effect as a Novel Solution to the KM3-230213A Puzzle

We provide a novel 'dark' matter effect explanation of the highest-energy event recently reported by KM3NeT.

Speaker: Bhupal Dev (Washington University in St. Louis)

dev_mitchell051325.pdf

dev_mitchell051325.pdf

dev_mitchell051325.pptx

11:46 AM A Neutron Portal to Ultra High Energy Neutrinos

Speaker: Matheus Hostert

mh_UHE_nus.pdf

12:09 PM Searching for dark matter with lepton flavour violation

Speaker: Dr Innes Bigaran (Fermilab and Northwestern University)

M_CS_seminar.pdf

12:32 PM → 1:45 PM Lunch

1:45 PM → 3:17 PM Tuesday Afternoon Session 1

Conveners: James Dent (Sam Houston State University), James Dent

1:45 PM Direct and indirect signatures of portals to hidden sectors

Speaker: Can Kilic

portals Mitchell 2025.pdf

2:08 PM Searches for Long Lived Particles at ATLAS and CMS

Speaker: G Shani Nimeshika Perera (University of Massachusetts (US))

Mitchell25_Perera.pdf

2:31 PM Evidence for Sterile Neutrinos and BSM Physics

Strong Evidence for sterile neutrinos comes from the LSND, MiniBooNE, and BEST neutrino experiments. These and ongoing experiments will be discussed.

Speaker: William Louis (LANL)

2:54 PM Broad Physics Opportunities and Discovery Potential in the Forward Region at the LHC

The far-forward direction at the Large Hadron Collider exhibits an intense beam of TeV hadrons and other particles, bridging the energy and intensity frontiers. The hadrons’ subsequent decays produce the most energetic human-made neutrino and muon beam, and potentially, new particles. The resulting Standard Model flux offers a powerful probe of non-perturbative QCD, with implications for both central LHC experiments and connections to cosmic-ray and neutrino observatories. Meanwhile, the same environment presents discovery opportunities for physics beyond the Standard Model, accessible through current forward experiments like FASER and future detectors at the proposed Forward Physics Facility. In this talk, I will highlight the broad physics reach of forward measurements at the LHC and the compelling discovery prospects in the upcoming data-taking runs.

Speaker: Max Fieg (University of California Irvine (US))

Mitchell2025.pptx

3:17 PM → 3:40 PM Coffee

3:40 PM → 5:35 PM Tuesday Afternoon Session 2

Convener: Isabelle Goldstein (Texas A&M University)

3:40 PM CMB Constraints on Non-Minimally Coupled Ultralight Dark Matter

Speaker: Prof. Kimberly Boddy (University of Texas at Austin)

4:03 PM Structure Formation in Dark Matter with Warm White Noise

Speakers: Mustafa Amin, Mustafa Amin (Rice University)

4:26 PM Observational Signatures of Cosmological Stasis

Cosmological stasis is a phenomenon wherein the abundances of multiple cosmological energy components with different equations of state remain constant for an extended period despite the expansion of the universe. In this talk, I discuss the possible observational implications of this phenomenon. These include characteristic imprints in the stochastic gravitational-wave background and an enhanced growth of perturbations in the density of matter on small scales.

Speaker: Brooks Thomas

Mitchell-Workshop-2025-25-min.pdf

4:49 PM TBD

Speakers: Savvas Koushiappas, Savvas Koushiappas (Brown University)

5:12 PM Evaporating Primordial Black Holes: Reformation and Isocurvature Perturbations

Primordial black holes (PBHs) lighter than 10^9 g are expected to have fully evaporated before the big bang nucleosynthesis, leaving their past abundances unconstrained by observations. Depending on their initial abundance, these PBHs could have temporarily dominated the Universe or remained as a subdominant component. In this talk, I explore the cosmological implications of such light mass PBHs. If they induced an early matter-dominated phase, the growth of initial PBH density perturbations could trigger collapse on horizon scales, leading to the formation of significantly heavier PBHs. These reformed PBHs survive beyond the evaporation of the original PBHs, and could give multi-messenger signatures observable today. Alternatively, if light mass PBHs never dominated the Universe, they can generate significant isocurvature perturbations due to their biased clustering and the branching ratio of their Hawking radiation. This can provide a novel avenue for observationally constraining their past abundances through cosmic microwave background constraints on the isocurvature perturbations.

Speaker: Dr TaeHun Kim (KIAS)

TaeHun_Kim.pdf

6:00 PM → 8:00 PM Welcome Reception

Wed, May 14

8:00 AM → 9:00 AM Breakfast

9:00 AM → 10:32 AM Wednesday Morning Session 1

Convener: Pedro Machado (Fermilab)

9:00 AM The Cosmological Preference for Negative Neutrino Mass

Cosmological measurement of the absolute mass scale of neutrinos is a long-anticipated product of ongoing and upcoming cosmological surveys. The recent release of baryon acoustic oscillation (BAO) data from DESI, when combined with observations of the cosmic microwave background (CMB), has pushed our precision toward the level necessary to detect the cosmological impact of neutrino mass. However, analysis of these datasets has led to surprising results. The upper limit on the sum of neutrino masses is tighter than anticipated, and in fact the cosmological measurements favor a negative sum of neutrino masses. I will discuss how this inference shows a preference for excess cosmological clustering. I will show how excess clustering might be explained by models of new physics which have not yet been ruled out by other observations, and which in many cases make new predictions that can be observationally tested with near-future data.

Speaker: Joel Meyers (Southern Methodist University)

9:23 AM A model for `neutrino' self-interaction in cosmology

In this talk, I will discuss a novel way of modeling neutrino self-interactions for cosmological observables. The mechanism relies on the fact that neutrinos and dark radiation, having the same abundance and free-streaming properties, are indistinguishable in low-energy cosmological probes. The minimal proof-of-principle model naturally accommodates relaxed neutrino mass constraint and mimics strong neutrino self-interactions. The model is safe from laboratory and BBN bounds.

Speaker: Dr Subhajit Ghosh (The University of Texas at Austin)

9:46 AM Gravothermal Collapse of Dark Matter Halos: Theory and Signatures

Speaker: Hai-Bo Yu (University of California Riverside)

10:09 AM Searching for Dark Matter and Fifth Forces Using Magnetic Levitation

Speaker: Dorian Amaral (Rice University)

10:32 AM → 11:00 AM Coffee

11:00 AM → 12:32 PM Wednesday Morning Session 2

Convener: Mudit Rai (Texas AM University)

11:00 AM Multiscalar Production at the LHC and Beyond

While di-Higgs production has long been of interest, in scalar extensions of the Standard Model multi-scalar production beyond di-Higgs can be interesting. In this talk I will discuss some signatures of resonant multi-scalar production, focusing on the complex singlet extension of the Standard Model in particular.

Speaker: Ian Lewis (The University of Kansas)

11:23 AM Photon Excess Signals from Neutrino and Dark Matter Scattering at MiniBooNE and MicroBooNE

Speaker: Doojin Kim

11:46 AM Spinning the search for sub-GeV dark matter at direct detection

The direct detection of sub-GeV dark matter (DM) remains a significant challenge due to the low recoil energies involved. In this talk, we focus on the scattering rate of sub-GeV DM particles interacting via spin-dependent couplings with nucleons, in solid-state targets. For DM masses below 100 MeV, the dominant scattering process involves incoherent multiphonon production, which offers a promising avenue to extend sensitivity to this low-mass regime. We evaluate the potential of upcoming experiments to detect such interactions and compare their sensitivity to existing constraints, including those from stellar cooling limits, beam dump experiments, and meson factory searches that probe the mediating particle. Incorporating these bounds, we estimate that future detectors could observe a few scattering events per kilogram per year of exposure.

Speaker: stefania gori (UC Santa Cruz)

12:09 PM Observable CMB B-modes from Cosmological Phase Transitions

A B-mode polarization signal in the cosmic microwave background (CMB) is widely regarded as smoking gun evidence for gravitational waves produced during inflation. Here we demonstrate that tensor perturbations from a cosmological phase transition can produce a B-mode signal whose strength rivals that of testable inflationary predictions across a range of observable scales. Although phase transitions arise from causal sub-horizon physics, they nevertheless exhibit a white noise power spectrum on super-horizon scales. Power is suppressed on the large scales relevant for CMB B-mode polarization, but it is not necessarily negligible. For appropriately chosen phase transition parameters, the maximal B-mode amplitude can compete with inflationary predictions that can be tested with current and future experiments. These scenarios can be differentiated by performing measurements on multiple angular scales, since the phase transition signal predicts peak power on smaller scales.

Speakers: Gordan Krnjaic (Fermi National Accelerator Laboratory), Gordan Krnjaic (Fermilab)

12:32 PM → 1:45 PM Lunch

1:45 PM → 3:17 PM Wednesday Afternoon Session 1

Convener: Zhen Liu

1:45 PM Higgs boson properties with ATLAS and CMS

Speaker: Mr Ram Krishna Sharma (Purdue University (US))

2:05 PM Hybrid quantum-classical approach for combinatorial problems at hadron colliders

In recent years, quantum computing has drawn significant interest within the field of high-energy physics. We explore the potential of quantum algorithms to resolve the combinatorial problems in particle physics experiments. As a concrete example, we consider top quark pair production in the fully hadronic channel at the Large Hadron Collider. We investigate the performance of various quantum algorithms such as the Quantum Approximation Optimization Algorithm (QAOA) and a feedback-based algorithm (FALQON). We demonstrate that the efficiency for selecting the correct pairing is greatly improved by utilizing quantum algorithms over conventional kinematic methods. Furthermore, we observe that gate-based universal quantum algorithms perform on par with machine learning techniques and either surpass or match the effectiveness of quantum annealers. Our findings reveal that quantum algorithms not only provide a substantial increase in matching efficiency but also exhibit scalability and adaptability, making them suitable for a variety of high-energy physics applications. Moreover, quantum algorithms eliminate the extensive training processes needed by classical machine learning methods, enabling real-time adjustments based on individual event data.

Speaker: K.C. Kong

Mitchell2025.pdf

2:25 PM Searching for Dark Sectors at Neutrino Experiments

I will discuss new possibilities for studying long-lived dark sector particles at short-baseline neutrino experiments and dark matter models at the far detectors of long-baseline experiments.

Speaker: Joshua Berger (Colorado State University)

2:45 PM Searches for the Dark Sector in ATLAS and CMS

Speaker: Qimin Jiang (University of Hong Kong (HK))

3:17 PM → 3:40 PM Coffee

3:40 PM → 5:38 PM Wednesday Afternoon Session 2

Conveners: Gordan Krnjaic (Fermi National Accelerator Laboratory), Gordan Krnjaic (Fermilab)

3:40 PM Upscattering Inelastic Dark Matter in the Earth

There are many possible reasons that we have not yet detected dark matter: it could be very weakly interacting, too light to trigger conventional detectors, or very massive and thus rare. But another possibility is that dark matter may scatter predominantly inelastically with Standard Model particles. In a typical model, elastic scattering is absent at tree level, and a relatively light dark matter state must upscatter into a heavier state in order to interact at all. This introduces an energy threshold for scattering to even take place, and in the case that it does occur, can substantially change the kinematics of scattering in a detector. In this talk, I will discuss the excitation of inelastic dark matter in the Earth, followed by its downscattering inside a detector. Considering this process substantially extends the sensitivity of existing detectors to inelastic dark matter, in a way that relies only on scattering with nuclei. I will present new limits on inelastic dark matter based on XENON100 and XENON1T data, which extend to significantly larger mass splittings than previous bounds based on these experiments.

Speakers: Christopher Cappiello, Christopher Cappiello

4:03 PM Dark matter signatures from the cosmic web

Cosmic filaments form the structure of the cosmic web, with dark matter making up the majority of their mass. If GeV-scale dark matter particles in filaments decay into electron-positron pairs, they could generate radio waves through synchrotron radiation. A realistic description of the expected dark matter decay signals from cosmic filaments requires a detailed characterization of the dark matter distribution within them. I will present the dark matter density profiles in filaments extracted from state-of-the-art cosmological simulations and discuss their implications for indirect detection signals from dark matter decay. In particular, I will focus on the decay of dark matter into electron-positron pairs and discuss the resulting constraints on the dark matter decay lifetime.

Speakers: Nassim Bozorgnia, Nassim Bozorgnia (York University, University of Alberta)

4:26 PM Detecting boosted dark photons with gaseous detectors

Speaker: Michael Graesser

4:49 PM TBD

Speaker: Tao Xu (The University of Oklahoma)

5:12 PM Searching for dark matter using knockout neutrons at neutrino experiments

We propose a novel approach to utilize knockout neutrons from dark-matter interaction with a nucleus in neutrino experiments, while previous studies have focused on recoiling protons. This method is especially crucial for water Cerenkov detectors, where high proton Cerenkov threshold (~1 GeV) suppresses signal acceptance. The knockout neutrons produce gamma rays when captured by medium, which are detectable in coincidence with prompt gamma rays from oxygen de-excitation and secondary interactions of neutrons. Recently, Super-Kamiokande (SK) was doped with gadolinium (SK-Gd) to enhance neutron detection efficiency. Using SK-Gd as a target experiment, we demonstrate that this method increases sensitivity to boosted-dark-matter models by an order of magnitude compared to free proton-based analysis, and it allows exploration of a wider range of light dark-matter models previously inaccessible with proton-based analysis. We also present the projected sensitivity for the upcoming Hyper-Kamiokande detector.

Speakers: Prof. Jong-Chul Park (Chungnam National University (KR)), Jong-Chul Park (Korea Institute for Advanced Study)

6:00 PM → 11:00 PM Excursion

https://indico.cern.ch/event/1488822/page/38353-excursion

Thu, May 15

8:00 AM → 9:00 AM Breakfast

9:00 AM → 10:32 AM Thursday Morning Session 1

Convener: Prof. Joel Walker (Sam Houston State University)

9:00 AM Tackling Sterile Neutrino Global Fits with Simulation-Based Inference

Neutrino experiments across diverse production and detection methods, baselines, and energy ranges have observed anomalies hinting at beyond-Standard Model physics. These unexplained appearances and disappearances could stem from oscillations into sterile neutrino states. Global fits—combined statistical analyses of multiple experiments—are essential for probing such models. However, even in the simplest 3+1 sterile neutrino scenario, these fits become computationally intractable due to violations of Wilks' theorem. In this talk, I will outline these statistical challenges, introduce simulation-based inference (SBI)—a cutting-edge machine learning (ML) approach to efficient analyses of data—and demonstrate how SBI can overcome computational barriers in global fits. Once fully developed, SBI has the potential to unlock previously inaccessible analyses in particle physics, and may be a vital tool for hunting down the sterile neutrino.

Speaker: Joshua Villarreal

9:23 AM DArk Messenger Searches at an Accelerator, the DAMSA-Net

Speaker: Prof. Jaehoon Yu (University of Texas at Arlington (US))

9:46 AM Detecting CEvNS on germanium

Coherent elastic neutrino nucleus scattering (CEvNS) is the interaction of the neutrino with the nucleus as a whole. A coherent interaction is achieved for neutrinos with energies less than 50 MeV as can be found at the spallation neutron source (SNS) at the Oak Ridge National Laboratory (ORNL) and at nuclear reactors. CEvNS is detected by registering the tiny recoil of the nucleus that the neutrino interacted with, which puts high demands on the noise threshold of the detector. In my talk, I will illustrate how high-purity germanium spectrometers (HPGe) with their low noise threshold are highly suitable for a precision detection of CEvNS to probe the standard model of particle physics. I will talk about the first detection of CEvNS on germanium at the SNS with the Ge-Mini detector setup and the first detection of CEvNS at reactor site with CONUS+ at the Leibstadt reactor. Finally, I will give a brief outlook on the future potential in particular with regards on the noise threshold.

Speakers: Janina Dorin Hakenmueller (Duke University), TBD

10:09 AM ArCS: A Magnetized Liquid Argon Time Projection Chamber for Neutrino Physics and Beyond

Liquid Argon Time Projection Chambers (LArTPCs) have revolutionized neutrino physics with their exceptional imaging and calorimetric capabilities. However, the lack of a magnetic field limits their ability to distinguish particle charge and measure momentum through curvature. ArCS (Argon detector with Charge Separation) presents an experimental program to demonstrate the operation of a magnetized LArTPC, a critical step toward enhancing the physics reach of future detectors. Using the existing LArIAT detector placed inside the Jolly Green Giant magnet at Fermilab's Test Beam Facility, we aim to: (i) establish charge sign discrimination for electrons and positrons, (ii) reconstruct particle momenta via curvature, and (iii) determine the minimal magnetic field required for these measurements. A successful demonstration will open pathways for large-scale magnetized LArTPCs, enabling precise neutrino-antineutrino separation, improved electron-photon discrimination, and expanded sensitivity to Beyond Standard Model physics.

Speaker: Dr Marco Del Tutto (Fermilab)

10:32 AM → 11:00 AM Coffee

11:00 AM → 12:32 PM Thursday Morning Session 2

Convener: Doojin Kim

11:00 AM Searches for scalar boson pairs with ATLAS and CMS

Speaker: Federico Montereali (Universita e INFN Roma Tre (IT))

11:23 AM Physics opportunities at the LHC in the coming decades

Speaker: Liantao Wang

11:46 AM Analysis with boosted objects at ATLAS and CMS

Speaker: Marta Lanzac Berrocal (Univ. of Valencia and CSIC (ES))

12:09 PM Quantum Entanglement is Quantum: ZZ Production at the LHC

Speaker: dorival Gonçalves (Oklahoma State University)

12:32 PM → 1:45 PM Lunch

1:45 PM → 3:17 PM Thursday Afternoon Session 1

Convener: Andrew Long (Rice University)

1:45 PM Neutrino Self-Interaction in Core-Collapse Supernovae

Even with only Standard Model interactions, neutrinos play a critical role in core-collapse supernovae, cooling the proto-neutron star, setting the conditions for nucleosynthesis, and likely powering the explosion. Their effects could be immensely more profound in the presence of new physics, often poorly constrained by laboratory experiments alone. In this talk, I will discuss the effects of the strong lepton number violating neutrino self-interactions (LNV νSI) on the infall phase of the core-collapse supernova evolution. Strong LNV νSI processes equilibrate all neutrino seas; hence, all neutrino species share a common temperature and chemical potential. The new lowered electron neutrino chemical potential renders increased electron captures. I will show how strong LNV vSI could alter the standard supernova collapse scenario. Unlike many existing studies focusing on the late evolution effects, this study simulated the impact of LNV vSI on the infall phase with a full analytic treatment. The rapid neutrino-antineutrino equilibration leads to entropy generation and enhanced electron capture that may impact star evolution and the emitted neutrino signal. Timely DUNE neutrino detectors can also independently probe this new physics.

Speakers: Anna M. Suliga (UC Berkeley and U. of Wisconsin), Anna Suliga

2:08 PM Dirac Neutrinos and the Strong CP Problem from SU(5) × SU(5)

Speaker: Anil Thapa (Colorado State University)

2:31 PM Boosted Dark Matter from Supernova

Core-collapse supernovae (SNe), among the universe's most energetic events, offer a novel window into the dark sector by potentially producing a flux of boosted dark matter (BDM). This study investigates the detectability of such supernova-induced BDM, focusing on fermionic BDM candidates that interact via a dark gauge boson portal. We examine the expected BDM flux at Earth, considering contributions from both the diffuse background of all galactic supernovae and potentially strong signals from individual nearby events.

Speaker: Fazlollah Hajkarim (University of Oklahoma)

2:54 PM Axion stars: mass functions and constraints

Speaker: Jae Hyeok Chang (Fermilab and UIC)

3:17 PM → 3:40 PM Coffee

3:40 PM → 5:35 PM Thursday Afternoon Session 2: Thursday Afternoon session 2

Convener: Zhichao Zeng

3:40 PM Probing Low-scale Baryogenesis in Neutron Stars

I present low-scale baryogenesis scenarios that involve a singlet fermion with baryon-number-violating couplings to quarks. After briefly discussing the consequences of these models for low-energy and high-energy experiments, I show how neutron stars can be
used to tightly constrain such interactions for GeV scale fermions.

Speaker: Rouzbeh Allahverdi (University of New Mexico)

4:03 PM Novel Astrophysical Probes of Exotic Dark Matter Candidates

Speakers: Andrew Zentner (University of Pittsburgh), Andrew Zentner (University of Pittsburgh)

4:26 PM Gamma-ray quiet millisecond pulsars and the Galactic Center Excess

Speaker: Addy Evans

4:49 PM Indirect Detection of Hot Dark Matter

Cosmologically stable, light particles that came into thermal contact with the Standard Model in the early universe may persist today as a form of hot dark matter. For relics with masses in the eV range, their role in structure formation depends critically on their mass. We trace the evolution of such hot relics and derive their density profiles around cold dark matter halos, introducing a framework for their indirect detection. Applying this framework to axions, a natural candidate for a particle that can reach thermal equilibrium with the Standard Model in the early universe and capable of decaying into two photons, we establish stringent limits on the axion-photon coupling using current observations of dwarf galaxies, the Milky Way halo, and galaxy clusters. Our results set new bounds on hot axions in the 1-10 eV range.

Speaker: Barmak Shams Es Haghi (University of Texas at Austin)

5:12 PM Hunting axions with the James Webb Space Telescope

Axions with a mass around 1 eV can decay into near-infrared photons. Utilising blank-sky observations from the James Webb Space Telescope, I search for a narrow emission line due to decaying dark matter and derive leading constraints on the axion-photon coupling in the eV-scale mass range.

Speaker: Elena Pinetti

6:00 PM → 8:00 PM Conference Dinner

Fri, May 16

8:00 AM → 9:00 AM Breakfast

9:00 AM → 10:32 AM Friday Morning Session 1

Convener: Andre De Gouvea

9:00 AM Exceptional Unification

Realistic grand unified theories based on the exceptional group $E_6$ will be presented and their phenomenological implications explored. These include fermion masses, neutrino oscillations, proton decay and a GUT-stabilized dark matter candidate.

Speakers: Kaladi Babu, Ks Babu (Oklahoma State University)

9:23 AM Searches for heavy objects with ATLAS and CMS

Speaker: Saptaparna Bhattacharya (Southern Methodist University (US))

9:46 AM Non-thermal Dark Matter in First-Order Phase Transitions

We propose a novel scenario to obtain the correct relic abundance for thermally under-produced dark matter. This scenario utilizes a strongly first-order phase transition that gives rise to dark matter mass m. Freeze-out in the broken phase can yield the desired abundance in the entire region currently allowed by observational bounds and theoretical constraints. We show that the accompanying gravitational waves are strong enough to be detected by many upcoming and proposed experiments. This, in tandem with dark matter indirect searches, provides a multi-messenger probe of such models. Positive signals in the future can help reconstruct the potential governing the phase transition and shed light on an underlying particle physics realization.

Speakers: Peisi Huang, Peisi Huang

10:09 AM Searches via effective filed theory with ATLAS and CMS

Speaker: Kenichi Hatakeyama (Baylor University (US))

10:32 AM → 11:00 AM Coffee

11:00 AM → 12:32 PM Friday Morning Session 2

Convener: William Shepherd

11:00 AM Electroweak Observables in Neutrino-Electron Scattering from a Muon Storage Ring

The standard candles of electroweak observables can be studied through the lens of neutrino-electron scattering as a purely weak process. We project the sensitivity of a neutrino detector situated around 100 meters away in the plane of a high energy muon storage ring or muon collider with $E_\mu = 0.25, 1.5$, and $5$ TeV muon beam energies, providing a highly energetic and highly intense source of electron and muon (anti)neutrinos. We find world-leading sensitivity to the weak couplings at the sub-percent level is possible, with sensitivity to the Standard Model prediction for the neutrino charge radius. Finally, we show that sensitivity to the momentum transfer dependence of $\sin^2\theta_W$ at the $0.01\%$ level, within a single dataset and configuration of the proposed experiment, is possible.

Speaker: Adrian Thompson

11:23 AM Individual Neutrino Masses From a Supernova

A nearby supernova will carry an unprecedented wealth of information about astrophysics, nuclear physics, and particle physics. Because supernova are fundamentally neutrino driven phenomenon, our knowledge about neutrinos -- particles that remain quite elusive -- will increase dramatically with such a detection. One of the biggest open questions in particle physics is related to the masses of neutrinos. Here we show how a galactic supernova provides information about the masses of each of the three mass eigenstates individually, at some precision, and is well probed at JUNO. This information comes from several effects including time delay and the physics within the supernova. The time delay feature is strongest during a sharp change in the flux such as the neutronization burst; additional information may also come from a QCD phase transition in the supernova or if the supernova forms a black hole. We consider both standard cases as dictated by local oscillation experiments as well as new physics motivated scenarios where neutrino masses may differ across the galaxy.

Speaker: Dr Peter Denton (Brookhaven National Laboratory)

11:46 AM Constraining non-standard neutrino interactions with neutral current events at long-baseline oscillation experiments

We explore, for the first time, neutral-current events at long-baseline experiments to constrain vector and axial-vector neutrino non-standard interactions (NSI) with quarks. We leverage the flavor dependence of NSIs to perform an oscillation analysis in the neutral-current channel. We analyze NOvA neutral-current data which provides significantly improved constraints on the axial-vector NSI parameters. This is highly complementary to constraints from SNO data.

Speaker: Julia Gehrlein (Colorado State University (US))

12:09 PM T-invariance violation in neutrino oscillations and matter effects

I discuss T-invariance violation in neutrino oscillations, concentrating on the impact - or lack thereof - of matter effects.

Speakers: Andre De Gouvea, Andre de Gouvea (Northwestern University)

12:32 PM → 12:50 PM Closing & Farewell

Speaker: Kevin Kelly (Texas A&M University)