A5061874111- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- High-Energy Particle Collisions Research
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Advanced NMR Techniques and Applications
- Particle accelerators and beam dynamics
- International Science and Diplomacy
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Physics of Superconductivity and Magnetism
- Galaxies: Formation, Evolution, Phenomena
- Quantum chaos and dynamical systems
- X-ray Spectroscopy and Fluorescence Analysis
- Radio Astronomy Observations and Technology
- Atomic and Molecular Physics
- Quantum Mechanics and Applications
University of Wisconsin–Madison
2016-2025
University of Oklahoma
2022
University of California, Santa Barbara
2001-2016
Iowa State University
1990-2009
Columbia University
2009
Instituto de Física Corpuscular
2009
Universitat de València
2009
University of Florida
2005
Fermi National Accelerator Laboratory
1992-1999
University of California, Davis
1995
This white paper addresses the hypothesis of light sterile neutrinos based on recent anomalies observed in neutrino experiments and latest astrophysical data.
Gauge singlet extensions of the standard model (SM) scalar sector may help remedy its theoretical and phenomenological shortcomings while solving outstanding problems in cosmology. Depending on symmetries potential, such provide a viable candidate for observed relic density cold dark matter or strong first order electroweak phase transition needed baryogenesis. Using simplest extension SM with one real field, we analyze generic implications singlet-extended Higgs boson phenomenology at Large...
Two-Higgs-doublet models predict nonstandard physical effects through the interactions of charged Higgs scalars. We analyze experimental measurements that bound these and quantify resulting constraints on charged-Higgs-boson mass coupling parameter $tan\ensuremath{\beta}$. consider low-energy data relating to ${B}_{d}^{0}\ensuremath{-}{\overline{B}}_{d}^{0}$, ${D}^{0}\ensuremath{-}{\overline{D}}^{0}$, ${K}^{0}\ensuremath{-}{\overline{K}}^{0}$ mixing, high-energy at $p\overline{p}$ colliders...
We evaluate the influence of coherent forward scattering in matter upon neutrino oscillations three-neutrino picture. write down exact solution and also approximate first-order solutions that exhibit general features more transparently. Oscillation characteristics could be observed deep-mine experiments are discussed illustrated using an oscillation suggested by solar reactor data.
We make a numerical study of gauge and Yukawa unification in supersymmetric grand unified models examine the quantitative implications fermion mass Ans\"atze at scale. Integrating renormalization group equations with ${\ensuremath{\alpha}}_{1}({M}_{Z})$ ${\ensuremath{\alpha}}_{2}({M}_{Z})$ as inputs, we find ${\ensuremath{\alpha}}_{3}({M}_{Z})\ensuremath{\simeq}0.111(0.122)$ for ${M}_{\mathrm{SUSY}}={m}_{t}$ ${\ensuremath{\alpha}}_{3}({M}_{Z})\ensuremath{\simeq}0.106(0.116)$...
We analyze a simple extension of the standard model (SM) obtained by adding complex singlet to scalar sector (cxSM). show that cxSM can contain one or two viable cold dark matter candidates and conditions on parameters potential yield observed relic density. When contains global $U(1)$ symmetry is both softly spontaneously broken, it candidate ingredients necessary for strong first order electroweak phase transition as needed baryogenesis. also study implications discovery Higgs boson at...
It has been argued that requiring low electroweak fine-tuning (EWFT) along with a (partial) decoupling solution to the SUSY flavor and CP problems leads sparticle mass spectra characterized by light Higgsinos at 100-300 GeV, sub-TeV third generation scalars, gluinos few TeV multi-TeV first/second scalars (natural SUSY). We show starting trilinear soft breaking terms, natural spectrum can be generated radiatively via renormalization group running effects. Using complete 1-loop effective...
The Circular Electron Positron Collider (CEPC) is a large international scientific facility proposed by the Chinese particle physics community to explore Higgs boson and provide critical tests of underlying fundamental principles Standard Model that might reveal new physics. CEPC, be hosted in China circular underground tunnel approximately 100 km circumference, designed operate as factory producing electron-positron collisions with center-of-mass energy 240 GeV. collider will also at around...
An analysis of high-energy $\ensuremath{\pi}N$ scattering is made, through the range $0\ensuremath{\le}\ensuremath{-}t\ensuremath{\le}2$ (${\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$, in terms $P$, ${P}^{\ensuremath{'}}$, ${P}^{\ensuremath{'}\ensuremath{'}}$, $\ensuremath{\rho}$, and ${\ensuremath{\rho}}^{\ensuremath{'}}$ Regge poles. High-energy data are supplemented by continuous-moment sum rules that exploit low-energy analyticity. Predictions made for a current future experiments.
The ATLAS and CMS collaborations have reported an excess of events in the $\ensuremath{\gamma}\ensuremath{\gamma}$, $Z{Z}^{*}\ensuremath{\rightarrow}4\ensuremath{\ell}$ $W{W}^{*}$ search channels at invariant mass $m\ensuremath{\simeq}125\text{ }\text{ }\mathrm{GeV}$, which could be first evidence for long-awaited Higgs boson. We investigate consequences requiring ${m}_{h}\ensuremath{\simeq}125\text{ }\mathrm{GeV}$ both minimal supergravity 2-parameter nonuniversal supersymmetric models. In...
Models of natural supersymmetry seek to solve the little hierarchy problem by positing a spectrum light higgsinos m_0 leads automatic cancellations during renormalization group (RG) running, and radiatively-induced low fine-tuning at electroweak scale. Coupled with large mixing in top squark sector, RNS allows for 3-10% level TeV-scale squarks 125 GeV Higgs scalar h. The model least partial solution SUSY flavor, CP gravitino problems since first/second generation scalars (and gravitino) may...
We identify three independent two-fold parameter degeneracies (\delta, \theta_{13}), sgn(\delta m^2_{31}) and (\theta_{23}, \pi/2-\theta_{23}) inherent in the usual three-neutrino analysis of long-baseline neutrino experiments, which can lead to as much an eight-fold degeneracy determination oscillation parameters. discuss implications these have for detecting CP violation present criteria breaking them. A superbeam facility with a baseline at least long distance between Fermilab Homestake...
The status of the research on muon colliders is discussed and plans are outlined for future theoretical experimental studies. Besides continued work parameters a 3-4 0.5 TeV center-of-mass (CoM) energy collider, many studies now concentrating machine near 0.1 that could be factory s-channel production Higgs particles. We discuss various components in such colliders, starting from proton accelerator needed to generate pions heavy-Z target proceeding through phase rotation decay ($\pi \to \mu...
We examine the spectrum of supersymmetric particles predicted by grand unified theoretical (GUT) models where electroweak symmetry breaking is accomplished radiatively. evolve soft supersymmetry parameters according to renormalization group equations (RGE). The minimization Higgs potential conveniently described means tadpole diagrams. present complete one-loop expressions for these conditions, including contributions from matter and gauge sectors. concentrate on low $\tan \beta$ fixed point...
The conclusions of the Physics Working Group international scoping study a future Neutrino Factory and super-beam facility (the ISS) are presented. ISS was carried by community between NuFact05, 7th International Workshop on Factories Superbeams, Laboratori Nazionali di Frascati, Rome, June 21-26, 2005) NuFact06 (Ivine, California, 24{30 August 2006). physics case for an extensive experimental programme to understand properties neutrino is presented role high-precision measurements...
Part 1 Linear motion: Newtonian theory interactions the drag racer - frictional force sport parachuting viscous archery spring methods of solution simple harmonic oscillator damped motion forced with damping resonance. 2 Energy conservation: potential energy gravitational escape small oscillations three-dimensional vector notation conservation forces in three dimensions a plane pendulum coupled oscillators. 3 Lagrangian method: Lagrange's equations some applications Lorentz mechanical...
In this paper we survey the signals and backgrounds for a strongly-interacting electroweak symmetry breaking sector at hadron supercolliders in TeV region. We study process pp->WWX, compute rates ``gold-plated'' channels, where W^{+/-}->l^{+/-}\nu Z -> l^+l^- (l = e,\mu), wide variety of models. Using forward jet-tag, central jet-veto back-to-back lepton cut to suppress Standard Model backgrounds, demonstrate that SSC LHC have substantial sensitivity strong interactions sector.
This report summarizes the work of Energy Frontier Higgs Boson working group 2013 Community Summer Study (Snowmass). We identify key elements a precision physics program and document potential future experimental facilities as elucidated during Snowmass study. study couplings to gauge boson fermion pairs, double production for self-coupling, its quantum numbers $CP$-mixing in couplings, mass total width, prospects direct searches additional bosons extensions Standard Model. Our includes...
A neutral dark matter particle may possess an electric dipole moment (EDM) or a magnetic (MDM), so that its scattering with nuclei is governed by electromagnetic interactions. If the moments are associated relevant operators of dimension-5, they be detectable in direct search experiments. We calculate complete expressions cross sections and recoil energy spectra for these attributes. also provide useful formulae pertinent to interacts via charge form factor (CFF) which related radius defined...
Assuming that the positron excess in PAMELA satellite data is a consequence of annihilations cold dark matter, we consider from model-independent perspective if show preference for spin matter. We then perform general analysis into two-body final states to determine what weighted combination channels best describes data.
We study the minimal gauged $U(1{)}_{B\ensuremath{-}L}$ supersymmetric model and show that it provides an attractive theory for spontaneous $R$-parity violation. Both $R$ parity are broken by vacuum expectation value of right-handed sneutrino (proportional to soft supersymmetry masses), thereby linking $B\ensuremath{-}L$ SUSY scales. In this context we find a consistent mechanism generating neutrino masses realistic mass spectrum, all without extending Higgs sector standard model. discuss...