Pengfei Zhuang

BCS–BEC CROSSOVER IN RELATIVISTIC FERMI SYSTEMS

We review the BCS–BEC crossover in relativistic Fermi systems, including the QCD matter at finite density. In the first part, we study the BCS–BEC crossover in a relativistic four-fermion interaction model and show how the relativistic effect affects the BCS–BEC crossover. In the second part, we investigate both two-color QCD at finite baryon density and pion superfluid at finite isospin density, by using an effective Nambu–Jona–Lasinio model. We will show how the model describes the weakly interacting diquark and pion condensates at low density and the BEC–BCS crossover at high density.

Leakage effect onJ/ψptdistributions in different centrality bins for Pb-Pb collisions atE/A=160GeV

A transport approach including a leakage effect for J/psis in the transverse phase space is used to calculate the ratios between the J/psi transverse momentum distributions in several centrality bins for Pb-Pb collisions at E/A = 160 GeV. From the comparison with the CERN-SPS data, where the centrality is characterized by the transverse energy Et, the leakage effect is extremely important in the region of high transverse momentum and high transverse energy, and both the threshold and the comover models can describe the ratio well for all centrality bins except the most central one (Et < 100 GeV), for which the comover model calculation is considerably better than the threshold one.

Dispersion relation of the ρ meson in hot and dense nuclear matter

The dispersion relation of

Density effect on hadronization of a quark plasma

\rho

BCS-BEC crossover and thermodynamics in asymmetric nuclear matter with pairings in isospin I=0 and I=1 channels

meson in both timelike and spacelike regimes in hot and dense nuclear medium is analyzed and compared with

Quark and gluon condensates in isospin matter

\sigma

Deconfinement phase transition in an expanding quark system in the relaxation time approximation

meson based on the quantum hadrodynamics model. The pole and screening masses of

Multiplicity moments and hard processes in relativistic heavy ion collisions

\rho

Pion enhancement and chiral symmetry

and

Meson scattering in a pion superfluid

\sigma