论文标题
重型离子碰撞中的手性对称性断裂和化学平衡
Chiral symmetry breaking and chemical equilibrium in a heavy-ion collisions
论文作者
论文摘要
我们检查了同音对称限制的伪内介子八位八分组的热量，其相互作用通过手性对称性，单位性和测量来限制。反应振幅产生的所有共振量达到约2 GEV，具有十二个输入参数，即f_pi，三个质量和八个低能量常数（LEC）的手性扰动理论。在线性响应理论中，我们发现物质需要很长时间才能进行热化。这些漫长的放松时间直接与这些介体是手性对称性破裂的伪石玻色子的事实。该结果表明，一旦进入手性对称性损坏的相位，重离子碰撞中用零重击的火球将脱离化学平衡。
We examine the thermalization of an ensemble of the octet of pseudoscalar mesons, in the isospin symmetric limit, whose interactions are constrained through chiral symmetry, unitarity, and measurements. The reaction amplitudes generate all resonances up to masses of about 2 GeV, with twelve input parameters, namely f_pi, three masses, and eight low energy constants (LECs) of chiral perturbation theory. In linear response theory, we find that matter takes an extremely long time to thermalize. These long relaxation times are directly related to the fact that these mesons are pseudo-Goldstone bosons of chiral symmetry breaking. This result indicates that fireballs created with zero baryon number in heavy-ion collisions will drop out of chemical equilibrium once they enter the chiral symmetry broken phase.
