A5085941621- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Theoretical and Computational Physics
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Stochastic processes and statistical mechanics
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Physics of Superconductivity and Magnetism
- Cosmology and Gravitation Theories
- Quantum many-body systems
- Markov Chains and Monte Carlo Methods
- Advanced Combinatorial Mathematics
- Random Matrices and Applications
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Topological and Geometric Data Analysis
- Graph theory and applications
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Algebraic structures and combinatorial models
- Complex Systems and Time Series Analysis
- Nuclear Physics and Applications
- Nuclear physics research studies
Stony Brook University
2016-2025
National Cheng Kung University
2020
Indiana University – Purdue University Indianapolis
2020
University of Tennessee at Knoxville
2015
Yale University
2007-2013
State University of New York
2001-2010
Universidad de Costa Rica
2008
Stanford University
2008
SLAC National Accelerator Laboratory
2008
Brookhaven National Laboratory
1985-2001
This biennial review summarizes much of Particle Physics. Using data from previous editions, plus 1900 new measurements 700 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We also summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics Standard Model, detectors,...
We analyze the phase diagram of QCD with two massless quark flavors in space temperature $T$ and chemical potential baryon charge \ensuremath{\mu} using available experimental knowledge QCD, insights gained from various models, as well general model independent arguments including continuity, universality, thermodynamic relations. A random matrix is used to describe chiral symmetry restoration transition at finite \ensuremath{\mu}. In agreement arguments, this predicts a tricritical point...
This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (Search Hidden Particles) experiment is intended to hunt in largely unexplored domain of very weakly interacting particles with masses below Fermi scale, inaccessible LHC experiments, and study tau neutrino physics. same proton beam setup can be used later look decays tau-leptons lepton flavour number non-conservation, $\tau\to 3\mu$ search weakly-interacting sub-GeV dark matter candidates. We discuss...
We analyze the circumstances under which violations of an approximate symmetry in a unified gauge theory weak interactions are naturally suppressed; particular, we investigate muon- and electron-type lepton-number conservation as example such symmetry. Extending earlier work, propose treatment this together with strangeness by neutral current $\mathrm{CP}$ invariance. The rate for decay $\ensuremath{\mu}\ensuremath{\rightarrow}e\ensuremath{\gamma}$ is calculated general SU(2)...
A massive Dirac neutrino has a magnetic moment, which causes its spin to precess in field. This reduces the effective weak cross sections for relativistic neutrinos. An estimate on basis of phenomenological considerations as well standard electroweak theory indicates that neutrinos from supernovae and neutron stars may contain significant mixtures negative- positive-helicity states.
This review of the properties leptons, mesons, and baryons is an updating Review Particle Properties, Data Group [Phys. Lett. 111B (1982)]. are evaluated, listed, averaged, summarized in tables. Numerous tables, figures, formulae interest to particle physicists also included. A data booklet available.
This paper is a review of the present status neutrino mass physics, which grew out an APS sponsored study neutrinos in 2004. After discussion knowledge masses and mixing some popular ways to probe new physics implied by recent data, it summarizes what can be learned about interactions as well nature beyond Standard Model from various proposed experiments. The intriguing possibility that may at heart our understanding long standing puzzle cosmology, i.e. origin matter–antimatter asymmetry...
Abstract The existence of nonzero neutrino masses points to the likely multiple Standard Model neutral fermions. When such states are heavy enough that they cannot be produced in oscillations, referred as leptons (HNLs). In this white paper, we discuss present experimental status HNLs including colliders, beta decay, accelerators, well astrophysical and cosmological impacts. We importance continuing search for HNLs, its potential impact on our understanding key fundamental questions,...
In this paper and the others in series we present a generalized theory of weak leptonic semileptonic decays which consistently incorporates possibility nonzero neutrino masses associated lepton mixing. work give an analysis charged pseudoscalar mesons within theory. The charged-lepton spectrum from such decay is shown to consist not just single line, but instead discrete set lines. We state precise meaning neutrino-mass limits. leads new very sensitive test for mixing corresponding proposal...
We carry out a new, generalized analysis of nuclear $\ensuremath{\beta}$ decay and semileptonic hyperon ${K}_{e3}$ decays. The results are used to determine two quark mixing angles in the sequential Weinberg-Salam model.
We study the phase transition in nonlinear $O(N)$ $\ensuremath{\sigma}$ model $2+\ensuremath{\epsilon}$ dimensions. Our analysis is of continuum theory and does not rely upon artifice a lattice. This occurs at critical value coupling constant ${\ensuremath{\lambda}}_{c}$, which an ultraviolet-stable fixed point renormalization group. In "low temperature" symmetry realized nonlinearly with $N\ensuremath{-}1$ massless pions. By solving large-$N$ limit, to leading order $\frac{1}{N}$, we show...
We analyze muon and electron lepton-number nonconservation in a pure $V\ensuremath{-}A$ gauge model. The rates for $\ensuremath{\mu}\ensuremath{\rightarrow}e\ensuremath{\gamma}$, $\ensuremath{\mu}\ensuremath{\rightarrow}\mathrm{ee}\overline{e}$, ${K}_{L}\ensuremath{\rightarrow}\ensuremath{\mu}\overline{e}$ are computed this find that reasonable range of neutral heavy-lepton mass these accord with, but not extremely small compared to, present experimental bounds. comment on the...
We present a general theory of leptonic decays which consistently incorporates the possibility nonzero neutrino masses and associated lepton mixing. calculate differential decay distribution $\frac{{d}^{2}\ensuremath{\Gamma}}{d{E}_{b}d}$ $cos\ensuremath{\theta}$ ${l}_{b}$ polarization for "the" ${l}_{a}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\mathrm{la}}{l}_{b}{\overline{\ensuremath{\nu}}}_{\mathrm{lb}}$, i.e., in incoherent sum...
Using existing data we determine optimal bounds on the quark mixing angles in standard six-quark Kobayashi-Maskawa version of Weinberg-Salam model. The analysis is based a recent generalized Cabibbo fit and constraints predicted values ${K}_{L}\ensuremath{-}{K}_{S}$ mass difference $\mathrm{CP}$-nonconservation parameter $\ensuremath{\epsilon}$. We give resulting branching ratios lifetimes $c$-, $b$-, $t$-flavored hadrons.
We show that the chiral-limit vacuum quark condensate is qualitatively equivalent to pseudoscalar meson leptonic decay constant in sense they are both obtained as value of well-defined gauge-invariant hadron-to-vacuum transition amplitudes possess a spectral representation terms current-quark mass. Thus, whereas it might sometimes be convenient imagine otherwise, neither essentially mass-scale fills all spacetime. This means, particular, can understood property hadrons themselves, which...
We consider a vectorial, asymptotically free gauge theory and analyze the effect of higher-loop corrections to beta function on evolution from ultraviolet infrared. study case in which contains $N_f$ copies fermion transforming according fundamental representation several higher-dimensional representations group. also calculate values anomalous dimension mass, $\gamma_m$ $\bar\psi\psi$ at infrared zero function. find that for given theory, calculated three- four-loop order, evaluated...
Dynamical chiral symmetry breaking and its connection with the generation of hadron masses has historically been viewed as a vacuum phenomenon. We argue that confinement makes such position untenable. If quark-hadron duality is reality in QCD, then condensates, those quantities were commonly constant empirical mass-scales fill all spacetime, are instead wholly contained within hadrons; viz., they property hadrons themselves expressed, e.g., their Bethe-Salpeter or light-front wave functions....
A detailed discussion is given of the analysis recent data to obtain improved upper bounds on couplings $|U_{e4}|^2$ and $|U_{\mu 4}|^2$ for a mainly sterile neutrino mass eigenstate $\nu_4$. Using excellent agreement among ${\cal F}t$ values superallowed nuclear beta decay, an limit derived emission The ratios branching $R^{(\pi)}_{e/\mu}=BR(\pi^+ \to e^+ \nu_e)/BR(\pi^+ \mu^+ \nu_\mu)$, $R^{(K)}_{e/\mu}$, $R^{(D_s)}_{e/\tau}$, $R^{(D_s)}_{\mu/\tau}$, $R^{(D)}_{e/\tau}$, $BR(B^+\rightarrow...
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...