A5046826115- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Medical Imaging Techniques and Applications
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Scientific Computing and Data Management
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Gamma-ray bursts and supernovae
- Conferences and Exhibitions Management
- International Science and Diplomacy
- Polar Research and Ecology
- Probability and Risk Models
- Nuclear Physics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Advanced Queuing Theory Analysis
- Geophysics and Sensor Technology
Brown University
2016-2025
John Brown University
2022-2025
University of Antwerp
2024
A. Alikhanyan National Laboratory
2023-2024
Institute of High Energy Physics
2019-2024
Fermi National Accelerator Laboratory
1993-2023
Providence College
2021
European Organization for Nuclear Research
2012-2013
Harvard University Press
2008
Boston University
2001-2007
Abstract Colliders are essential research tools for particle physics. Numerous future collider proposal were discussed in the course of US high energy physics community strategic planning exercise Snowmass'21 . The Implementation Task Force (ITF) has been established to evaluate proposed accelerator projects performance, technology readiness, schedule, cost, and environmental impact. Corresponding metrics developed uniform comparison proposals ranging from Higgs/EW factories multi-TeV...
We describe the construction of end-to-end jet image classifiers based on simulated low-level detector data to discriminate quark- vs. gluon-initiated jets with high-fidelity CMS Open Data. highlight importance precise spatial information and demonstrate competitive performance existing state-of-the-art classifiers. further generalize approach event-level classification quark gluon di-jet QCD events. compare fully using hand-engineered features that algorithm is robust against effects...
Using the Columbia University--Stony Brook (CUSB-II) detector we have studied inclusive photon spectrum from 2.9\ifmmode\times\else\texttimes\fi{}${10}^{4}$ \ensuremath{\Upsilon}(5S) decays. We observe a strong signal due to ${\mathit{B}}^{\mathrm{*}}$\ensuremath{\rightarrow}B\ensuremath{\gamma} From this obtain (i) average ${\mathit{B}}^{\mathrm{*}}$-B mass difference, 46.7\ifmmode\pm\else\textpm\fi{}0.4 MeV, (ii) yield per decay,...
Z' bosons that couple preferentially to the third generation fermions can arise in models with extended weak (SU(2)xSU(2)) or hypercharge (U(1)xU(1)) gauge groups. We show existing limits on quark-lepton compositeness set by LEP and Tevatron experiments translate into lower bounds of order a few hundred GeV masses these bosons. Resonances this mass be directly produced at Tevatron. Accordingly, we explore detail Run II using process p pbar -> tau e mu. also comment possibility...
As the heaviest known fundamental particle, top quark has taken a central role in study of interactions. Production quarks pairs provides an important probe strong The mass is key parameter which places valuable constraint on Higgs boson and electroweak symmetry breaking. Observations relative rates kinematics final states constrain potential new physics. In many cases, tests available with are both critical unique. Large increases data samples from Fermilab Tevatron have been coupled major...
Theoretical progress in Higgs boson production and background processes is discussed with particular emphasis on QCD corrections at beyond next-to-leading order as well electroweak corrections. The residual theoretical uncertainties of the investigated are estimated detail. Moreover, recent investigations MSSM sector other extensions SM presented. potential LHC a high-energy linear e+e- collider for measurement couplings analyzed.
We consider the production at LHC of exotic quarks ${U}^{+}$ charge $Q=+(5/3)e$ and ${D}^{\ensuremath{-}}$ $Q=\ensuremath{-}(4/3)e$ mass ${m}_{*}$ arising in a composite fermion scenario characterized by compositeness scale $\mathrm{\ensuremath{\Lambda}}$. Such states are predicted models higher isospin multiplets (${I}_{W}=1$ or ${I}_{W}=3/2$). Given their charges (such as $5/3$), decays proceed through electroweak interactions. compute decay widths rates for resonant LHC. Partly motivated...
Using the CUSB-II detector at Cornell Electron Storage Ring, we have made precision measurements of electric dipole transition rates from \ensuremath{\Upsilon}\ensuremath{''} to${\mathrm{\ensuremath{\chi}}}_{\mathrm{b}}^{\ensuremath{'}}$, which are in excellent agreement with theory. The fine-structure splitting is found to...
We describe a novel application of the end-to-end deep learning technique to task discriminating top quark-initiated jets from those originating hadronization light quark or gluon. The combines algorithms and low-level detector representation high-energy collision event. In this study, we use lowlevel information simulated CMS Open Data samples construct jet classifiers. To optimize classifier performance progressively add tracking detector, including pixel reconstructed hits impact...
This report summarizes the work of Energy Frontier Topical Group on EW Physics: Heavy flavor and top quark physics (EF03) 2021 Community Summer Study (Snowmass). It aims to highlight potential top-quark studies heavy-flavor production processes (bottom charm) at HL-LHC possible future hadron lepton colliders running scenarios.
B-meson semileptonic decay spectra have been obtained at the \ensuremath{\Upsilon}(4S) and \ensuremath{\Upsilon}(5S) Cornell Electron Storage Ring with Columbia University--Stony Brook detector. The branching ratio for B\ensuremath{\rightarrow}e\ensuremath{\nu}X is found to be (10.0\ifmmode\pm\else\textpm\fi{}0.5)%. electron spectrum of observed first time average B,${\mathit{B}}_{\mathit{s}}$\ensuremath{\rightarrow}e\ensuremath{\nu}X consistent that B's from decays. shape indicates...
Using the Columbia University--Stony Brook detector at Cornell Electron Storage Ring, we have measured ${B}_{\ensuremath{\mu}\ensuremath{\mu}}$, branching fraction into muons, of 1S, 2S, and 3S \ensuremath{\Upsilon} mesons. We obtain ${\mathit{B}}_{\mathrm{\ensuremath{\mu}}\mathrm{\ensuremath{\mu}}}$(1S)=(2.61\ifmmode\pm\else\textpm\fi{}0.09\ifmmode\pm\else\textpm\fi{}0.11)%, ${\mathrm{\ensuremath{\Gamma}}}_{\mathrm{tot}}$(1S)=51.1\ifmmode\pm\else\textpm\fi{}3.2 keV,...
This report, as part of the 2021 Snowmass Process, summarizes current status collider physics at Energy Frontier, broad and exciting future prospects identified for challenges needs experiments, indicates high priority research areas.
Snowmass is a US long-term planning study for the high-energy community by American Physical Society's Division of Particles and Fields. For its simulation studies, opportunistic resources are harnessed using Open Science Grid infrastructure. Late binding grid technology, GlideinWMS, was used distributed scheduling jobs across many sites mainly in US. The pilot infrastructure also uses Parrot mechanism to dynamically access CvmFS order ascertain homogeneous environment nodes. This report...
Using the CUSB-II detector at CESR we have observed electric dipole transitions between $\ensuremath{\Upsilon}$ and ${\ensuremath{\chi}}_{b}$ states, both in exclusive inclusive channels. We measured their branching ratios find...
We have studied the decay chain \ensuremath{\Upsilon}\ensuremath{''}\ensuremath{\rightarrow}${\mathrm{\ensuremath{\chi}}}_{\mathrm{b}}^{\ensuremath{'}}$(${\mathrm{\ensuremath{\chi}}}_{\mathrm{b}}$)\ensuremath{\gamma}\ensuremath{\rightarrow}\ensuremath{\Upsilon}\ensuremath{'}(\ensuremath{\Upsilon})\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\mu}(ee)\ensuremath{\gamma}\ensuremath{\gamma}with CUSB II detector at Cornell Electron Storage Ring. For a...