Kevin J. Kelly
A5027677037- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Muon and positron interactions and applications
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Radioactive Decay and Measurement Techniques
- Medical Imaging Techniques and Applications
- Advanced X-ray Imaging Techniques
- Advanced SAR Imaging Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Photocathodes and Microchannel Plates
- Black Holes and Theoretical Physics
- Textile materials and evaluations
- Quantum, superfluid, helium dynamics
Mitchell Institute
2023-2025
Texas A&M University
2023-2025
European Organization for Nuclear Research
2021-2024
Fermi National Accelerator Laboratory
2018-2023
Nicolaus Copernicus Astronomical Center
2022
Johannes Gutenberg University Mainz
2022
University of Sussex
2022
Deutsches Elektronen-Synchrotron DESY
2022
National Centre for Nuclear Research
2022
Institute of Nuclear Physics, Polish Academy of Sciences
2022
Large, nonstandard neutrino self-interactions have been shown to resolve the $\ensuremath{\sim}4\ensuremath{\sigma}$ tension in Hubble constant measurements and a milder amplitude of matter fluctuations. We demonstrate that interactions necessary size imply existence force carrier with large coupling ($>{10}^{\ensuremath{-}4}$) mass keV--100 MeV range. This mediator is subject stringent cosmological laboratory bounds, we find nearly all realizations such particle are excluded by existing...
Abstract High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along beam collision axis, outside acceptance existing LHC experiments. The proposed Forward Physics Facility (FPF), to be located several hundred meters from ATLAS interaction point and shielded by concrete rock, will host suite experiments probe standard model (SM) processes search for physics beyond (BSM). In this report, we review status civil engineering plans explore...
The Forward Physics Facility (FPF) is a proposal to create cavern with the space and infrastructure support suite of far-forward experiments at Large Hadron Collider during High Luminosity era. Located along beam collision axis shielded from interaction point by least 100 m concrete rock, FPF will house that detect particles outside acceptance existing large LHC observe rare exotic processes in an extremely low-background environment. In this work, we summarize current status plans for FPF,...
Abstract The existence of nonzero neutrino masses points to the likely multiple Standard Model neutral fermions. When such states are heavy enough that they cannot be produced in oscillations, referred as leptons (HNLs). In this white paper, we discuss present experimental status HNLs including colliders, beta decay, accelerators, well astrophysical and cosmological impacts. We importance continuing search for HNLs, its potential impact on our understanding key fundamental questions,...
We explore the effects of non-standard neutrino interactions (NSI) and how they modify propagation in Deep Underground Neutrino Experiment (DUNE). find that NSI can significantly data to be collected by DUNE experiment as long new physics parameters are large enough. For example, if consistent with standard three-massive-neutrinos paradigm, order 0.1 (in units Fermi constant) will ruled out. On other hand, present, able not only rule out paradigm but also measure parameters, sometimes good...
One proposed component of the upcoming Deep Underground Neutrino Experiment (DUNE) near detector complex is a multi-purpose, magnetized, gaseous argon time projection chamber: Multi-Purpose Detector (MPD). We explore new-physics potential MPD, focusing on scenarios in which MPD significantly more sensitive to new physics than liquid detector, specifically searches for semi-long-lived particles that are produced in/near beam target and decay MPD. The specific possibilities studied dark vector...
This report summarizes the present status of neutrino non-standard interactions (NSI). After a brief overview, several aspects NSIs are discussed, including connection to mass models, model-building and phenomenology large NSI with both light heavy mediators, in short- long-baseline oscillation experiments, cross-sections, complementarity other low- high-energy fits scattering data, DUNE sensitivity NSI, effective field theory as well relevance dark matter cosmology. We also discuss open...
With the advent of a new generation neutrino experiments which leverage high-intensity beams for precision measurements, it is timely to explore physics topics beyond standard neutrino-related physics. Given that realm model (BSM) has been mostly sought at high-energy regimes colliders, such as LHC CERN, exploration BSM in will enable complementary measurements energy balance LHC. This concert with ideas fixed target and beam-dump world-wide, e.g., those CERN. The combination high intensity...
While the QCD axion is often considered to be necessarily light ($\lesssim$ eV), recent work has opened a viable and interesting parameter space for heavy axions, which solve both Strong CP Quality Problems. These well-motivated as well generic axion-like-particles, call explorations in GeV mass realm at collider beam dump environments. The primary upcoming neutrino experiment, Deep Underground Neutrino Experiment (DUNE), simultaneously also powerful enabled by its multipurpose Near Detector...
We inspect recently updated neutrino oscillation data---specifically coming from the Tokai to Kamioka and NuMI Off-axis ${\ensuremath{\nu}}_{e}$ Appearance experiments---and how they are analyzed determine whether mass ordering is normal (${m}_{1}<{m}_{2}<{m}_{3}$) or inverted (${m}_{3}<{m}_{1}<{m}_{2}$). show that, despite previous results giving a strong preference for ordering, with newest data T2K NOvA, this has all but vanished. Additionally, we highlight importance of result...
Experimentally, baryon number minus lepton number, $B\ensuremath{-}L$, appears to be a good global symmetry of nature. We explore the consequences existence gauge-singlet scalar fields charged under $B\ensuremath{-}L$--dubbed lepton-number-charged scalars (LeNCSs)---and postulate that these couple standard model degrees freedom in such way $B\ensuremath{-}L$ is conserved even at nonrenormalizable level. In this framework, neutrinos are Dirac fermions. Including only lowest mass-dimension...
We investigate the potential for Deep Underground Neutrino Experiment (DUNE) to probe existence and effects of a fourth neutrino mass eigenstate. study mixing eigenstate with three active neutrinos Standard Model, including new sources $CP$-invariance violation, wide range mass-squared differences, from lower than ${10}^{\ensuremath{-}5}\text{ }\text{ }{\mathrm{eV}}^{2}$ higher $1\text{ }{\mathrm{eV}}^{2}$. DUNE is sensitive previously unexplored regions angle--mass-squared difference...
We explore the capabilities of upcoming Deep Underground Neutrino Experiment (DUNE) to measure $\nu_\tau$ charged-current interactions and associated oscillation probability $P(\nu_\mu \to \nu_\tau)$ at its far detector, concentrating on how such results can be used probe neutrino properties interactions. DUNE has potential identify significantly more events than all existing experiments use this data sample nontrivially test three-massive-neutrinos paradigm by providing complementary...
We propose a low-cost and movable setup to probe minicharged particles using high-intensity proton fixed-target facilities. This proposal, FerMINI, consists of scintillator-based detector, requiring multicoincident scintillation signatures within small time window, located downstream the target neutrino experiment. During collisions large number protons on target, intense particle beams may be produced via meson photo-decays Drell-Yan production. take advantage high statistics, shielding,...
We introduce the mono-neutrino signal at neutrino detectors as a smoking gun of sub-GeV scale dark matter candidates that mainly interact with standard model neutrinos. In process, invisible particles, either themselves or mediator particle, are radiated off when it undergoes charged-current weak interaction. The associated signals include missing transverse momentum respect to incoming beam direction and production wrong-sign charged leptons. demonstrate potential leading role future DUNE...
A bstract The unitarity of the lepton mixing matrix is a critical assumption underlying standard neutrino-mixing paradigm. However, many models seeking to explain as-yet-unknown origin neutrino masses predict deviations from in active states. Motivated by prospect that future experiments may provide precise measurement matrix, we revisit current constraints on violation oscillation measurements and project how next-generation will improve our knowledge. With data, normalizations all rows...
Secret neutrino interactions can play an essential role in the origin of dark matter. We present anatomy production mechanisms for sterile matter, a keV-scale gauge-singlet fermion that mixes with active neutrinos, presence new vector boson mediating secret among neutrinos. identify three regimes boson's mass and coupling where it makes distinct impact on matter through dispersion relations and/or scattering rates. also analyze models gauged...
Tau neutrinos are the least studied particle in Standard Model. This whitepaper discusses current and expected upcoming status of tau neutrino physics with attention to broad experimental theoretical landscape spanning long-baseline, beam-dump, collider, astrophysical experiments. was prepared as a part NuTau2021 Workshop.
We explore the sensitivity of Deep Underground Neutrino Experiment (DUNE) near detector and proposed DUNE-PRISM movable to sub-GeV dark matter, specifically scalar matter coupled Standard Model via a photon. consider produced in DUNE target that travels scatters off electrons. By combining searches for at many off-axis positions with DUNE-PRISM, this scenario can be much stronger than when performing measurement one on-axis position.
We propose to use the unique event topology and reconstruction capabilities of liquid argon time projection chambers study sub-GeV atmospheric neutrinos. The detection low energy recoiled protons in DUNE allows for a determination leptonic $CP$-violating phase independent from accelerator neutrino measurement. Our findings indicate that this analysis can exclude range values ${\ensuremath{\delta}}_{CP}$ beyond $3\ensuremath{\sigma}$ level. Moreover, flux will have important consequences...