M. Sullivan
A5082622726- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Distributed and Parallel Computing Systems
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Radio Astronomy Observations and Technology
- Quantum Computing Algorithms and Architecture
- Quantum-Dot Cellular Automata
- Mining Techniques and Economics
- Quantum Information and Cryptography
- Gamma-ray bursts and supernovae
- Superconducting and THz Device Technology
- X-ray Spectroscopy and Fluorescence Analysis
- Drilling and Well Engineering
- Advanced X-ray Imaging Techniques
- Embedded Systems and FPGA Applications
Brookhaven National Laboratory
1985-2024
SLAC National Accelerator Laboratory
1991-2024
University of Kansas
2014-2021
University of Maryland, College Park
2015-2019
Max Planck Institute for Biophysical Chemistry
2011
Max Planck Institute for Dynamics and Self-Organization
2011
Japan Atomic Energy Agency
2011
Japan Proton Accelerator Research Complex
2011
Stanford University
2006-2010
Stanford Synchrotron Radiation Lightsource
1991-2007
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
The simplest extension of the standard model is to add a gauge singlet scalar, $S$: singlet-extended model. In absence ${Z}_{2}$ symmetry $S\ensuremath{\rightarrow}\ensuremath{-}S$ and if new scalar sufficiently heavy, this can lead resonant double Higgs production, significantly increasing production rate over prediction. While searches for signal are being performed, it important have benchmark points models with which compare experimental results. paper we determine these benchmarks by...
The Standard Model effective field theory (SMEFT) is the tool of choice for studying deviations Higgs couplings from predictions. SMEFT an expansion in infinite tower higher dimension operators, which typically truncated at dimension-6. We consider including dimension-8 operators and examine matching to 2 Doublet (2HDM) that assumed be valid some high scale. Both limits direct production single bosons indirect on tri-linear coupling are considered context matched 2HDM, importance assumptions...
We present a model in which an up-type vectorlike quark (VLQ) is charged under new $U(1{)}_{d}$ gauge force kinetically mixes with the Standard Model hypercharge. The boson of dark photon, ${\ensuremath{\gamma}}_{d}$. Traditional searches for VLQs rely on decays into electroweak bosons $W$, $Z$, or Higgs. However, since no evidence has been found at Large Hadron Collider (LHC), it imperative to search other novel signatures beyond their traditional decays. As we show, if photon much less...
The use of the Standard Model effective field theory Lagrangian to quantify possible Beyond (BSM) effects is standard in LHC and future collider studies. One usual assumptions truncate expansion with dimension-six operators. numerical impact next terms series, dimension-eight operators, unknown general. We consider a specific BSM model containing charge-$2/3$ heavy vectorlike quark compute operators generated at dimension eight. these are studied for $t\overline{t}h$ process, where they...
A future Higgs Factory will provide improved precision on measurements of couplings beyond those obtained by the LHC, and enable a broad range investigations across fields fundamental physics, including mechanism electroweak symmetry breaking, origin masses mixing particles, predominance matter over antimatter, nature dark matter. Future colliders measure to few per cent, giving window Standard Model (BSM) physics in 1-10 TeV range. In addition, they make precise width, characterize...
We consider the Standard Model extended by addition of a complex scalar singlet, with no assumptions about additional symmetries potential. This model provides for resonant di-Higgs production Higgs particles different masses. demonstrate that regions parameter space allowed precision electroweak measurements, experimental limits on single production, and perturbative unitarity allow large rates relative to SM rates. In this scenario, dominant mechanism new states is production. Results are...
One of the assumptions simplified models is that there are a few new particles and interactions accessible at LHC all other heavy decoupled. The effective field theory (EFT) method provides consistent to test this assumption. Simplified can be augmented with higher order operators involving LHC. Any UV completion model will able match onto these beyond Standard Model EFTs (BSM-EFT). In paper, we study simplest model: extended by real gauge singlet scalar. addition usual renormalizable...
Abstract We describe herein a measurement of the Antarctic surface “roughness” performed by balloon‐borne ANITA (Antarctic Impulsive Transient Antenna) experiment. Originally purposed for cosmic ray astrophysics, radio frequency (RF) receiver gondola, from its 38 km altitude vantage point, can scan disk snow 600 in radius. The primary purpose is to detect RF emissions rays incident on Antarctica, such as neutrinos which penetrate through atmosphere and interact within ice, resulting signal...
We propose that neutrino masses can be zero in vacuo and may generated by the local distribution of dark matter through a feeble long range scalar force. discuss potential phenomenological constraints implications this framework. Our model typically implies cosmic background left over from big bang is mostly absent our Galactic neighborhood. Hence, positive detection signal future proposed experiments, such as PTOLEMY, could principle falsify scenario.
We develop benchmarks for resonant discalar production in the generic complex singlet scalar extension of Standard Model (SM) with no additional symmetries, which contains two new scalars. These maximize modes at future <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>p</a:mi><a:mi>p</a:mi></a:math> colliders: <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>p</c:mi><c:mi>p</c:mi><c:mo...
To explain the baryon asymmetry of Universe, we extend Standard Model (SM) with two additional Higgs doublets small vacuum expectation values. The fields interact SM fermions through complex Yukawa couplings, leading to new sources CP violation. We propose a simple flavor model $\mathcal{O}(1)$ or less couplings for quarks and charged leptons, consistent current constraints. generate neutrino masses asymmetry, right-handed neutrinos in $\sim 0.1-10$ TeV range couple "Higgs Troika." doublet...
A modest extension of the Standard Model by two additional Higgs doublets---the troika model---can provide a well-motivated scenario for successful baryogenesis if neutrinos are Dirac fermions. Adapting ``spontaneous flavor violation'' framework, we consider version model where light quarks have significant couplings to new multi-TeV states. Resonant production scalars leading dijet or top-pair signals typical predictions this setup. The initial- and final-state relevant collider...