A5042634318- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Cold Atom Physics and Bose-Einstein Condensates
- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Physics of Superconductivity and Magnetism
- Scientific Computing and Data Management
- Solid State Laser Technologies
- Black Holes and Theoretical Physics
Nanjing Tech University
2022-2024
Nanjing University
1995-2022
Collaborative Innovation Center of Advanced Microstructures
1995
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...
Exploiting an evolution scheme for parton distribution functions (DFs) that is all-orders exact, contemporary lattice-QCD (lQCD) results low-order Mellin moments of the pion valence quark DF are shown to be mutually consistent. The analysis introduces a means by which key odd can obtained from even in circumstances where only latter available. Combining these elements, one arrives at parameter-free lQCD-based predictions pointwise behaviour valence, glue, and sea DFs, with sound uncertainty...
High-precision nucleon-resonance electroproduction data on a large kinematic domain of energy and momentum transfer have proven crucial in revealing novel features strong interactions within the Standard Model unfolding structural details baryon excited states. Thus, anticipation new reaching to unprecedented photon virtuality, we employ quark-diquark approximation three-valence-quark bound-state problem compute ${\ensuremath{\gamma}}^{*}p\ensuremath{\rightarrow}{R}^{+}$...
Working with proton and pion valence distribution functions (DFs) determined consistently at the same, unique hadron scale exploiting possibility that there is an effective charge which defines evolution scheme for DFs all-orders exact, we obtain a unified body of predictions all – valence, glue, four-flavour-separated sea. Whilst light-front momentum fractions carried by identifiable parton classes are same any scale, pointwise behaviour strongly hadron-dependent. All calculated...
A class of Polyakov-loop-modified Nambu--Jona-Lasinio models has been used to support a conjecture that numerical simulations lattice-regularized QCD defined with chiral chemical potential can provide information about the existence and location critical end point in phase diagram drawn plane spanned by baryon temperature. That is challenged conflicts between model results analyses same problem using (lQCD) well-constrained Dyson-Schwinger equation (DSE) studies. We find conflict resolved...
We describe a calculation of the spectrum flavor-$\text{SU}(3)$ octet and decuplet baryons, their parity partners, radial excitations these systems, made using symmetry-preserving treatment vector $\ifmmode\times\else\texttimes\fi{}$ contact interaction as foundation for relevant few-body equations. Dynamical chiral symmetry breaking generates nonpointlike diquarks within baryons hence, interaction, flavor-antitriplet scalar, pseudoscalar, vector, flavor-sextet axial-vector quark-quark...
Electroproduction form factors describing the ${\ensuremath{\gamma}}^{*}p\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Delta}}}^{+}(1232)$, ${\mathrm{\ensuremath{\Delta}}}^{+}(1600)$ transitions are computed using a fully dynamical diquark-quark approximation to Poincar\'e-covariant three-body bound-state problem in relativistic quantum field theory. In this approach, $\mathrm{\ensuremath{\Delta}}(1600)$ is an analogue of Roper resonance nucleon sector, appearing as simplest radial...
We investigate the dynamical chiral symmetry breaking and its restoration at finite density temperature within two-flavor Nambu-Jona-Lasinio model, mainly focus on critical behaviors near end point (CEP) tricritical (TCP) of quantum chromodynamics. The multi-solution region Nambu Wigner ones is determined in phase diagram for massive massless current quark, respectively. use various susceptibilities to locate CEP/TCP then extract exponents them. Our calculations reveal that share same...
The effect of chirality imbalance on the QCD phase diagram is studied within two flavors Nambu-Jona-Lasinio model. We focus especially issues related to how chiral chemical potential (${\ensuremath{\mu}}_{5}$) affects diagram, and find ``chiral catalysis'' as well ``inverse effects, which are analogous magnetic catalysis inverse effects. Furthermore, our results different from existing model calculations, namely, there no ${\mathrm{CEP}}_{5}$ $T\text{\ensuremath{-}}{\ensuremath{\mu}}_{5}$...
A Poincar\'e-covariant $\mathrm{quark}+\mathrm{diquark}$ Faddeev equation is used to develop insights into the structure of four lightest $(I,{J}^{P}=\frac{3}{2},{\frac{3}{2}}^{\ifmmode\pm\else\textpm\fi{}})$ baryon multiplets. While these systems can contain isovector-axialvector and isovector-vector diquarks, one may neglect latter still arrive at a reliable description. The $(\frac{3}{2},{\frac{3}{2}}^{+})$ states are simpler systems, with features that bear some resemblance quark model...
In the mean field approximation of (2+1)-flavor Nambu--Jona-Lasinio model, we strictly derive several sets coupled equations for chiral susceptibility, quark number etc. at finite temperature and chemical potential. The critical exponents these susceptibilities in vicinity QCD end point (CEP) are presented SU(2) SU(3) cases, respectively. It is found that various share almost same behavior near CEP. comparisons between order parameters theoretical predictions also included.
We report on a recent calculation of all Roper-related electromagnetic transtions form factors, cov ering the range energies that next-to-come planned experiments are expected to map. Direct reliable cal culations were performed, within Poincaré covariant approach three-body bound-state problem, up Q 2 /m N =6; approximated then by applying Schlessinger point method and results eventually extended / m ≃12 via analytic continuation.
We present a unified description of elastic and transition form factors involving the nucleon its resonances; in particular, N(1440), Δ(1232) Δ(1600). compare predictions made using framework built upon Faddeev equation kernel interaction vertices that possess QCD-kindred momentum dependence with results obtained confining, symmetry-preserving treatment vector ⊗ contact-interaction widely-used leading-order (rainbow-ladder) truncation QCD's Dyson-Schwinger equations. This comparison explains...
Exploiting an evolution scheme for parton distribution functions (DFs) that is all-orders exact, contemporary lattice-QCD (lQCD) results low-order Mellin moments of the pion valence quark DF are shown to be mutually consistent. The analysis introduces a means by which key odd can obtained from even in circumstances where only latter available. Combining these elements, one arrives at parameter-free lQCD-based predictions pointwise behaviour valence, glue, and sea DFs, with sound uncertainty...
The task of mapping and explaining the spectrum baryons structure these states in terms quarks gluons is a longstanding challenge hadron physics, which likely to persist for another decade or more. We review progress made this topic using functional method based on Dyson-Schwinger equations. This framework provides non-perturbative, Poincar\'e-covariant continuum formulation Quantum Chromodynamics able extract novel insight baryon properties since physics at level directly related with...