Some Questions, Comments and Discussions ZHUANG Pengfei, Tsinghua University 1 QCD Phase Transitions & Heavy Ion Collisions, Weihai, August 9-14, 2009 许怒:recent results from STAR at RHIC; 许长补:heavy flavor physics at RHIC; 马余刚:RHIC能区的集体流; 徐庆华:spin physics with STAR at RHIC 柯志明:particle production in heavy ion collisions; 王恩科:喷注淬火; 袁峰:spin structure of nucleon; 徐喆:thermalization of QGP CSR 陈列文:重离子碰撞与核物质状态方程; 邹冰松:CSR强子物理; 王建松:CSR媒质效应; 徐瑚珊:CSR物理总结 王群:高密QCD相变 吴元芳:QCD临界点 2 QCD Phase Transitions & Heavy Ion Collisions, Weihai, August 9-14, 2009 Strongly Coupled Quark Matter ● two possible states of sQGP: a) independent quasi-partons b) partons + bound states ● lattice 2009: more non-perturbative when charm quark is thermalized, 50% contribution ! conclusion: non-perturbative QCD even at extremely high T ! 3 QCD Phase Transitions & Heavy Ion Collisions, Weihai, August 9-14, 2009 QCD at High Density T nB ● ● lattice 2009: searching for the QCD critical point in canonical ensemble atom gas QCD ● BCS-BEC crossover in QCD phase transitions at high density ● does the quarkyonic matter exist in real world with Nc=3 and what is the measurable consequence of the quarkyonic matter ? ● : no deconfinement in isospin matter due to pion superfluidity, even at extremely high isospin density ● Fridel oscillation at high density 4 QCD Phase Transitions & Heavy Ion Col