A5020107198- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Clinical practice guidelines implementation
- Particle Detector Development and Performance
- Molecular spectroscopy and chirality
- Cooperative Communication and Network Coding
- Particle Accelerators and Free-Electron Lasers
- High-pressure geophysics and materials
- Cognitive Radio Networks and Spectrum Sensing
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Scientific Computing and Data Management
- Trauma and Emergency Care Studies
- Advanced MIMO Systems Optimization
- Advanced NMR Techniques and Applications
- Case Reports on Hematomas
- Pulsars and Gravitational Waves Research
- Mathematical Analysis and Transform Methods
Thomas Jefferson National Accelerator Facility
2016-2024
George Washington University
2015-2024
University of California, Riverside
2024
Gifu Women's University
2021
Indiana University Bloomington
2018
Universidad de Salamanca
2018
Universidade de São Paulo
2018
Universidad Nacional Autónoma de México
2018
Technische Universität Berlin
2015-2017
HUN-REN Institute for Nuclear Research
2016-2017
We present results of a simulation two flavor QCD on ${16}^{3}\ifmmode\times\else\texttimes\fi{}4$ lattice using p4-improved staggered fermions with bare quark mass $m/T=0.4$. Derivatives the thermodynamic grand canonical partition function $Z(V,T,{\ensuremath{\mu}}_{u},{\ensuremath{\mu}}_{d})$ respect to chemical potentials ${\ensuremath{\mu}}_{u,d}$ for different flavors are calculated up sixth order, enabling estimates pressure and number density as well chiral condensate various...
This White Paper presents an overview of the current status and future perspective QCD research, based on community inputs scientific conclusions from 2022 Hot Cold Town Meeting. We present progress made in last decade toward a deep understanding both fundamental structure sub-atomic matter nucleon nucleus cold QCD, hot heavy ion collisions. identify key questions research plausible paths to obtaining answers those near future, hence defining priorities our over coming decades.
The three-particle quantization condition is partially diagonalized in the center-of-mass frame by using cubic symmetry on lattice. To this end, instead of spherical harmonics, kernel Bethe-Salpeter equation for particle-dimer scattering expanded basis functions different irreducible representations octahedral group. Such a projection particular importance three-body problem finite volume due to occurrence singularities above breakup. Additionally, we study numerical solution and properties...
The ab-initio understanding of hadronic three-body systems above threshold, such as exotic resonances or the baryon spectrum, requires mapping finite-volume eigenvalue produced in lattice QCD calculations, to infinite volume. We present first application a formalism physical system form three interacting positively charged pions. results for ground state energies agree with available by NPLQCD collaboration at unphysical pion masses. Extrapolations masses are performed using input from...
We perform a high-precision calculation of the phase shifts for $\pi$-$\pi$ scattering in I = 1, J 1 channel elastic region using elongated lattices with two mass-degenerate quark favors ($N_f 2$). extract $\rho$ resonance parameters Breit-Wigner fit at different masses, corresponding to $m_{\pi} 226$MeV and 315$MeV, an extrapolation physical point. The is based on unitarized chiral perturbation theory model that describes well phase-shifts around both masses. find extrapolated value,...
Three-body states are critical to the dynamics of many hadronic resonances. We show that lattice QCD calculations have reached a stage where these can be accurately resolved. perform calculation over wide range parameters and find all below inelastic threshold agree with predictions from state-of-the-art phenomenological formalism. This also illustrates reliability formalism used connect results infinite volume physics. Our is performed using three positively charged pions, different...
Strong three-body interactions above threshold govern the dynamics of many exotics and conventional excited mesons baryons. Three-body finite-volume energies calculated from lattice QCD promise an ab initio understanding these systems. We calculate three-${\ensuremath{\pi}}^{+}$ spectrum unraveling that is tightly intertwined with $S$-matrix principle unitarity compare it recent results. For this purpose, we develop a formalism for systems in moving frames apply numerically.
We perform a fit of the finite-volume QCD spectrum three pions at maximal isospin to constrain three-body force. use unitarity-based relativistic three-particle quantization condition, with GWUQCD obtained 315 MeV and 220 pion mass in two-flavor QCD. For heavier we find that data is consistent constant contact term close zero, whereas for lighter see statistically significant energy dependence tension prediction leading order ChPT. Our results also suggest enough levels, two-body amplitude...
In this review we give a perspective of the theoretical work done recently on interpretation results from $B$, $D$, $\Lambda_b$, $\Lambda_c$ weak decays into final states that contain interacting hadrons, and how it is possible to obtain additional valuable information increasing our understanding hadron interactions nature many hadronic resonances. The novelty these processes one begins with clean picture at quark level which allows select basic mechanisms by means process proceeds....
We conduct a two-flavor ($N_f=2$) lattice QCD calculation of the elastic phase-shifts for pion-pion scattering in scalar, isoscalar channel (the $\sigma$-meson). The is performed two quark masses corresponding to pion mass $315\text{ MeV}$ and $227\text{ MeV}$. $\sigma$-meson parameters are extracted using various parametrizations amplitude. results obtained from chiral unitary parametrization extrapolated physical point read $M_\sigma = (440^{+10}_{-16}(50) - i\,240(20)(25))\text{ MeV}$,...
The topical workshop Strong QCD from Hadron Structure Experiments took place at Jefferson Lab November 6–9, 2019. Impressive progress in relating hadron structure observables to the strong mechanisms has been achieved ab initio description of a diverse array methods order expose emergent phenomena via quasi-particle formation. wealth experimental data and advances theory make it possible gain insight into interaction dynamics regime large quark–gluon coupling (the regime), which will address...
The dynamics of multikaon systems are relevance for several areas nuclear physics. However, even the simplest systems, two and three kaons, hard to prepare study experimentally. Here we show how extract this information using first-principle lattice QCD results. We (i) extend relativistic three-body quantization condition strangeness sector, predicting first time excited level finite-volume spectrum three-kaon at maximal isospin (ii) present a calculation levels system in finite box. compare...
This document presents the initial scientific case for upgrading Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab (JLab) to 22 GeV. It is result of a community effort, incorporating insights from series workshops conducted between March 2022 and April 2023. With track record over 25 years in delivering world's most intense precise multi-GeV electron beams, CEBAF's potential higher energy upgrade unique opportunity an innovative nuclear physics program, which seamlessly...
The recently discovered enhancement of eta photoproduction on the quasi-free neutron at energies around sqrt(s)~1.67 GeV is addressed within a SU(3) coupled channel model. cross sections proton and neutron, sigma_n sigma_p, can be quantitatively explained. In this study, main source for peak in sigma_n/sigma_p effect S-wave that explains dip-bump structure gamma n --> n. particular, photon coupling to intermediate meson-baryon states important. stability result extensively tested consistency...