1、2006-5-20,China-Japan Nuclear Physics 2006,1,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
2、and Meng Jin,2006-5-20,China-Japan Nuclear Physics 2006,2,Color SuperConductor,1. Motivation,Shuryak, 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 effectiv
3、e 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,2006-5-20,China-Japan Nuclear Physics 2006,3,2. Quarks at MF + Mesons & Diquarks at RPA in NJL,chiral, pion and color condensates,MF quark propagat
4、or in Nambu-Gorkov space,2006-5-20,China-Japan Nuclear Physics 2006,4,2. Quarks at MF + Mesons & Diquarks at RPA in NJL,diquark & meson polarization functions,diquark & meson propagators at RPA,pole determines diquark & meson masses,for mesons,for diquarks D1 & D2,for diquarks D3,residue at the pole
5、 determines 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.,2006-5-20,China-Japan Nuclear Physics 2006,5,Gapless CSC induced by mismatched Fermi surfaces: Huang, Liao, Zh
6、uang: PRD2002,2003, Huang,Shovkovy,PLB2003Goldstone modes in CSC and Pion superfluidity, He, Jin, Zhuang: PLB2005, PRD2005,2006,Competition between Gapless state and LOFF state He, Jin, Zhuang: PRB2006, PRD2006,2. Quarks at MF + Mesons & Diquarks at RPA in NJL,2006-5-20,China-Japan Nuclear Physics 2
7、006,6,3. Resonances,critical temperature for chiral restoration,mesons & diquarks are in bound states,mesons & diquarks are in resonant states,2006-5-20,China-Japan Nuclear Physics 2006,7,4. Numerical Results & Conclusion,1) The boundary of meson (diquark) state is determined by the disappearance of
8、 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 agrees with the qualitative estimation.,Thanks for your patience,with the assumption,
