SU(3)味极限附近色味连锁型超导体中的束缚双夸克态  

Bound Diquark States in Color-Flavor-Locked Type Superconductor near the SU(3) Flavor Limit

作　　者：任春福[1] 张一[2] 张小兵[1] 

机构地区：[1]南开大学物理科学学院,天津300071 [2]上海师范大学物理系,上海200230

出　　处：《南开大学学报（自然科学版）》2011年第1期47-53,共7页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(10875058)

摘　　要：从理想的色味连锁相出发,在SU(3)味极限附近,给出了一个3味夸克超导体的近似描述.在手征对称性明显破缺的物理影响下,运用Nambu-Jona-Lasinio(NJL)模型在平均场层次上研究了两种双夸克态和束缚双夸克态的形成.当夸克之间的相互作用非常强时,首次指出了在3色和3味夸克参与Bardeen-Cooper-Schrieffer配对的环境下,轻味双夸克态发生玻色-爱因斯坦凝聚的可能性.Starting from the ideal color-flavor locked phase,an approximate description for three-flavor quark superconductor is proposed near the SU（3） flavor limit.Under the physical influence from explicitly chiral-symmetry-breaking,we investigate the behaviors for two species of diquark states and the formations of bound diquark states at the mean-field level.In strongly coupling density regime,a theoretical possibility is pointed out at the first time,that Bose-Einstein condensation of light-flavor diquark states occur in the environment where all three-flavor and three-color quarks participate the Bardeen-Cooper-Schrieffer pairing.

关 键 词：色超导 色味连锁 NJL模型 玻色-爱因斯坦凝聚 BEC-BCS越渡 

分 类 号：O572.243[理学—粒子物理与原子核物理]