强相互作用夸克-介子-双夸克等离子体的边界TheBoundaryof

1、强相互作用夸克介子双夸克等离子体的边界The Boundary of A Strongly Coupled Quark-Meson-Diquark Plasma 庄鹏飞(清华大学) Pengfei Zhuang (Tsinghua University) 1. Motivation 2. Quarks at MF + Mesons & Diquarks at RPA in NJL 3. Resonances 4. Numerical Results & Conclusion with Lianyi He and Meng Jin2006-5-201China-Japan Nuclear Phy

2、sics 2006pair dissociation line BCSTc(1.5-2) TcBECsQGP (Shuryak)Color SuperConductor1. MotivationShuryak, 2004: What RHIC tells us? Strongly coupled Quark-Gluon Plasma, HG to sQGP to wQGP Particles in sQGP are not quasiparticles but resonances While there is no confinement, NJL is an often used effe

3、ctive model in the investigation of QCD phase transitions at moderate T and U. what we want to do: boundary of a strongly coupled quark-meson-diquark plasma 2006-5-202China-Japan Nuclear Physics 2006 2. Quarks at MF + Mesons & Diquarks at RPA in NJL chiral, pion and color condensatesMF quark propaga

4、tor in Nambu-Gorkov space 2006-5-203China-Japan Nuclear Physics 2006 2. Quarks at MF + Mesons & Diquarks at RPA in NJL diquark & meson polarization functions diquark & meson propagators at RPA pole determines diquark & meson masses for mesonsfor diquarks D1 & D2for diquarks D3 residue at the pole de

5、termines coupling constants leading order of 1/N for quarks, and next to leading order for mesons & diquarks. symmetry breaking, Goldstone modes, symmetry restoration, hadron properties. 2006-5-204China-Japan Nuclear Physics 2006Gapless CSC induced by mismatched Fermi surfaces: Huang, Liao, Zhuang:

6、PRD2002,2003, Huang,Shovkovy,PLB2003Goldstone modes in CSC and Pion superfluidity, He, Jin, Zhuang: PLB2005, PRD2005,2006Competition between Gapless state and LOFF state He, Jin, Zhuang: PRB2006, PRD2006 2. Quarks at MF + Mesons & Diquarks at RPA in NJL 2006-5-205China-Japan Nuclear Physics 20063. R

7、esonancescritical temperature for chiral restorationmesons & diquarks are in bound statesmesons & diquarks are in resonant statespair dissociation line BCSTc(1.5-2) TcBECsQGP (Shuryak)2006-5-206China-Japan Nuclear Physics 20064. Numerical Results & Conclusion1) The boundary of meson (diquark) state is determined by the disappearance of the corresponding pole.2) The maximum limit temperature and the maximum chemical potential are about 2 times the critical values for chiral phase transition, which agree with the lattice calculation.3) Meson state can survive at higher temperatures, which