A5042842208- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- Algorithms and Data Compression
- Crime, Illicit Activities, and Governance
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Advanced Malware Detection Techniques
- Influenza Virus Research Studies
Texas A&M University
2018-2020
Mitchell Institute
2018-2020
University of California, Irvine
2013-2017
We present simplified models for the galactic center $\ensuremath{\gamma}$-ray excess where Dirac dark matter annihilates into pairs or triplets of on-shell bosonic mediators to standard model. These annihilation modes allow mass be heavier than those conventional effective theories excess. Because rate is set by matter--mediator coupling, model coupling can made parametrically small ``hide'' sector suppressing direct detection and collider signals. explore viability these as a thermal relic...
We examine the current constraints and future sensitivity of coherent elastic neutrino-nucleus scattering ($\mathrm{CE}\ensuremath{\nu}\mathrm{NS}$) experiments to mixing scenarios involving a ${Z}^{\ensuremath{'}}$ which interacts via portals with standard model. contrast results against those from fixed target, atomic parity violation, solar neutrino experiments. demonstrate significant dependence experimental reach on coupling nonuniversality complementarity...
The most recent measurement of the fine structure constant leads to a $2.4\ensuremath{\sigma}$ deviation in electron anomalous magnetic moment ${g}_{e}\ensuremath{-}2$, while muon ${g}_{\ensuremath{\mu}}\ensuremath{-}2$ has long-standing $3.7\ensuremath{\sigma}$ opposite direction. We show that these deviations can be explained three-loop neutrino mass model based on an ${E}_{6}$ Grand Unified Theory. also study impact such have events observed by ANITA experiment and find insufficient...
We study the LHC sensitivity to a ${W}^{\ensuremath{'}}$ produced via bottom and charm quarks decaying $\ensuremath{\tau}$ flavor leptons in mass range 200--1000 GeV. show that extra $b$ necessitated by production mechanism can improve background rejection compared an inclusive analysis relying solely on tagging ${E}_{T}^{\mathrm{miss}}$. present prospective limits couplings compare them best fit $R({D}^{(*)})$ anomalies $B$-meson decays.
We investigate models of a heavy neutral gauge boson ${Z}^{\ensuremath{'}}$ coupling mostly to third generation quarks and second leptons. In this scenario, bottom arising from gluon splitting can fuse into allowing the LHC probe it. generic framework presented, anomalies in $B$-meson decays reported by LHCb experiment imply flavor-violating $bs$ featured constraining lowest possible production cross section. A novel approach searching for...
MSSM4G models, in which the minimal supersymmetric standard model is extended to include vectorlike copies of particles, are promising possibilities for weak-scale supersymmetry. In particular, two called QUE and QDEE, realize major virtues supersymmetry (naturalness consistent with 125 GeV Higgs boson, gauge coupling unification, thermal relic neutralino dark matter) without need fine-tuned relations between particle masses. We determine implications these models matter collider searches....
We study the sensitivity of detectors with directional to coherent elastic neutrino-nucleus scattering ($\mathrm{CE}\ensuremath{\nu}\mathrm{NS}$), and how these complement measurements nuclear recoil energy. consider stopped pion reactor neutrino sources, use gaseous helium fluorine as examples detector material. generate Standard Model predictions, compare scenarios that include new, light vector or scalar mediators. show can provide valuable additional information in discerning new...
We supplement the minimal supersymmetric standard model (MSSM) with vector-like copies of particles. Such 4th generation particles can raise Higgs boson mass to observed value without requiring very heavy superpartners, improving naturalness and prospects for discovering supersymmetry at LHC. Here we show that these new are also motivated cosmologically: in MSSM, pure Bino dark matter typically overcloses Universe, but open up annihilation channels, allowing Binos have correct thermal relic...
Anomalies in B-meson decays reported by the LHC experiment suggest a violation of lepton universality. This could be explained introducing heavy neutral gauge boson Z' that selectively couples to third generation quarks and second leptons. While performance experimental searches for such models is good large masses, low-mass region sensitivity aversely affected SM background (mostly Drell-Yan). In this study, we present novel approach searching decaying muons association with at least two...
A model of spin-$3/2$ vectorlike leptons is introduced, which serve as an alternative probe possible lepton compositeness. Possible signatures at the Large Hadron Collider are explored, and current data used to constrain masses hypothetical new leptons.
We propose a new strategy to systematically search for physics processes in particle collisions at the energy frontier. An examination of all possible topologies which give identifiable resonant features specific final state leads tractable number ``topological models'' per and gives guidance their discovery. Using one state, $\ensuremath{\ell}\ensuremath{\ell}jj$, as an example, we find that possibilities is reasonable reveals simple, but as-yet-unexplored, contain significant discovery...
We explore the physics of a new neutral gauge boson, ($Z^\prime$), coupling to only third-generation particles with mass near electroweak boson poles. A $Z^\prime$ produced by top quarks and decaying tau leptons is considered. With simple search strategy inspired existing analyses standard model production in association quarks, we show that Large Hadron Collider has good exclusionary power over parameter space even at advent high-luminosity era. It shown $t\bar{t}Z^\prime$ process allows...
What vulnerabilities are on a given host? We might have scan data for the host from months ago or no butrough information about operating system, role in which department belongs to, etc. Our modelingapproach automatically extracts existing vulnerability and fills critical blanks information. Hostsmay be unavailable during scans, credentials lacking but most important stillneed patching remediation.In our investigation of major Midwest institution, it was surprising to find thatmost hosts...