A5100659526- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Neural Networks and Applications
- International Science and Diplomacy
- Nuclear reactor physics and engineering
- Scientific Computing and Data Management
- Quantum Computing Algorithms and Architecture
- Gaussian Processes and Bayesian Inference
- Model Reduction and Neural Networks
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Radiation Therapy and Dosimetry
University of Florida
2016-2025
Florida Department of State
2006-2025
Institute of High Energy Physics
2015-2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2014-2024
Florida Museum of Natural History
2022-2023
Roma Tre University
2023
Florida State University
2016-2023
Princeton University
2015-2022
Purdue University West Lafayette
2021
In this paper we compute one-loop corrections to masses and couplings in the minimal supersymmetric standard model. We present explicit formulae for complete a set of compact approximations which hold over unified parameter space associated with radiative electroweak symmetry breaking. illustrate importance accuracy our by scanning space. calculate W-boson mass, effective weak mixing angle, quark lepton masses, discuss implications gauge Yukawa coupling unification. also entire superpartner...
We propose that cold dark matter is made of Kaluza-Klein particles and explore avenues for its detection. The lightest state an excellent candidate if standard model propagate in extra dimensions parity conserved. consider gauge bosons. In sharp contrast to the case supersymmetric matter, these annihilate hard positrons, neutrinos photons with unsuppressed rates. Direct detection signals are also promising. These conclusions generic bosonic candidates.
We analyze focus points in supersymmetric theories, where a parameter's renormalization group trajectories meet for family of ultraviolet boundary conditions. show that class models including minimal supergravity, the up-type Higgs mass parameter has point at weak scale, its value is highly insensitive to universal scalar mass. As result, masses as large 2 3 TeV are consistent with naturalness, and all squarks, sleptons heavy scalars may be beyond discovery reaches CERN Large Hadron Collider...
Extra-dimensional theories contain a number of almost degenerate states at each Kaluza-Klein level. If extra dimensional momentum is least approximately conserved then the phenomenology such nearly depends crucially on mass splittings between KK modes. We calculate complete one-loop radiative corrections to masses in general 5 and 6 theories. apply our formulas example universal dimensions show that are essential any meaningful study phenomenology. Our calculations demonstrate Feynman...
For a top quark mass fixed to its measured value, we find natural regions of minimal supergravity parameter space where all squarks, sleptons, and heavy Higgs scalars have masses far above 1 TeV are possibly beyond the reach Large Hadron Collider at CERN. This result is simply understood in terms ``focus point'' renormalization group behavior holds any theory with universal scalar that large relative other supersymmetry breaking parameters. We highlight importance choice fundamental...
We define a minimal model with universal extra dimensions, and begin to study its phenomenology. The collider signals of the first Kaluza-Klein (KK) level are surprisingly similar those supersymmetric nearly degenerate superpartner spectrum. lightest KK particle (LKP) is neutral stable because parity. excitations cascade decay LKP yielding missing energy signatures relatively soft jets leptons. Level 2 modes may also be probed via their number violating decays standard particles. In either...
We contrast the experimental signatures of low-energy supersymmetry and model Universal Extra Dimensions discuss various methods for their discrimination at hadron colliders. study discovery reach Tevatron LHC level 2 Kaluza-Klein modes, which would indicate presence extra dimensions. find that with $100\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data will be able to discover ${\ensuremath{\gamma}}_{2}$ ${Z}_{2}$ KK modes as separate resonances if masses are below TeV. also investigate...
Assuming that cosmological dark matter consists of weakly interacting massive particles, we use the recent precise measurement parameters to predict guaranteed rates production such particles in association with photons at electron-positron colliders. Our approach is based on general physical principles as detailed balancing and soft/collinear factorization. It leads predictions are valid across a broad range models containing WIMPs, including supersymmetry, universal extra dimensions, many...
Recent results from Higgs boson and supersymmetry searches at the Large Hadron Collider provide strong new motivations for supersymmetric theories with heavy superpartners. We reconsider focus point (FP SUSY), in which all squarks sleptons may have multi-TeV masses without introducing fine-tuning weak scale respect to variations fundamental SUSY-breaking parameters. examine both FP SUSY its familiar special case, region of minimal supergravity, also known as constrained standard model...
Recently, Generative Adversarial Networks (GANs) trained on samples of traditionally simulated collider events have been proposed as a way generating larger datasets at reduced computational cost. In this paper we point out that data generated by GAN cannot statistically be better than the it was on, and critically examine applicability GANs in various situations, including a) for replacing entire Monte Carlo pipeline or parts it, b) to produce usage highly sensitive analyses sub-optimal...
Dark matter candidates arising in models of particle physics incorporating weak scale supersymmetry may produce detectable signals through their annihilation into neutrinos, photons, or positrons. A large number relevant experiments are planned underway. The ``logically possible'' parameter space is unwieldy. By working the framework minimal supergravity, we can survey implications for each other, as well direct searches, collider low-energy experiments, and naturalness a transparent...
In extended Higgs models, the boson may decay into a pair of light $\mathrm{CP}$-odd scalars, with distinctive collider signatures. We study ensuing signals at upgraded Fermilab Tevatron, considering subsequent decays scalars pairs gluons or photons. For lighter than few GeV, manifests itself as diphoton resonance and can be discovered up to masses hundred GeV. heavier reach extends most ${M}_{h}\ensuremath{\sim}120\mathrm{GeV}.$ also discuss capabilities CERN LHC lepton colliders in these channels.
The recently reported measurement of the muon's anomalous magnetic moment differs from standard model prediction by 2.6 sigma. We examine implications this discrepancy for supersymmetry. Deviations magnitude are generic in supersymmetric theories. Based on new result, we derive model-independent upper bounds masses observable particles. also several frameworks. sign deviation is as predicted many simple models, but disfavors anomaly-mediated supersymmetry breaking.
We compute the full set of weak-scale gauge and Yukawa threshold corrections in minimal supersymmetric standard model, including all finite (non-logarithmic) corrections, which we show to be important. use our results examine effects unification-scale missing-doublet SU(5) models. work context a unified mass spectrum, with scalar M0 gaugino M12, find that squark masses less than one TeV, successful coupling unification requires M12 ⪡ ⋍ 1 TeV. In contrast, model permits for wide range masses.
We consider SUSY-like missing energy events at hadron colliders and critically examine the common assumption that is result of two identical particles. In order to experimentally test this hypothesis, we generalize subsystem M T2 variable case asymmetric event topologies, where SUSY decay chains terminate in different "children" more general approach, endpoint T2(max) distribution now gives mass $$ {\tilde M_p}\left( M_c^{(a)},\tilde M_c^{(b)}} \right) parent particles as a function input...
This paper seeks to demonstrate that many of the existing mass-measurement variables proposed for hadron colliders (${m}_{T}$, ${m}_{\mathrm{eff}}$, ${m}_{T2}$, missing ${\stackrel{\ensuremath{\rightarrow}}{p}}_{T}$, ${h}_{T}$, ${\sqrt{\stackrel{^}{s}}}_{\mathrm{min}}$, etc.) are far more closely related each other than is widely appreciated, and indeed can all be viewed as a common mass-bound specialized variety purposes. A consequence this one may understand better strengths weaknesses...
We discuss nonstandard interpretations of the 750 GeV diphoton excess recently reported by ATLAS and CMS Collaborations which do not involve a new, relatively broad resonance with mass near GeV. Instead, we consider sequential cascade decay much heavier, possibly quite narrow, into two photons along one or more additional particles. The resulting invariant signal is generically rather broad, as suggested data. examine three specific event topologies-the "antler," "sandwich," two-step...