论文标题
夸克 - 梅森$σ$模型中手性相变的动力学
Kinetics of the chiral phase transition in a quark-meson $σ$ model
论文作者
论文摘要
使用两个不可约（2pi）$φ$功能性形式主义，用于在平衡中的线性 - $σ$模型的线性 - $σ$模型的均衡，在Quark Balle的时间演变中，在Quark firball的时间演变中（quark firation ne quarbally）（quark net quarball of time quarball of quarball of quarbally in quark in quark in quark y nequark of quarball of quarball of quarmeTery（quark）$ commote（$ commote）（$ camare）的净 - 巴里元数量的波动累积。通过纯粹的高斯波动初始化系统，由于$σ$ field的演变，暂时建立了四阶累积剂。然而，由于夸克，反夸克，介子和平均场之间的碰撞，这取决于火球膨胀的速度，这是平衡的。
Using the two-particle irreducible (2PI) $Φ$-functional formalism for self-consistent approximations of a linear-$σ$ model for quarks and mesons in and out of equilibrium, the build-up of fluctuations of net-baryon number during the time evolution of an expanding fireball is studied within a kinetic theory for the order parameter ($σ$ field) and quark distribution functions. Initializing the system with purely Gaussian fluctuations a fourth-order cumulant is temporarily built up due to the evolution of the $σ$-field. This is counterbalanced, however, by the dissipative evolution due to collisions between quarks, anti-quarks, mesons, and the mean field, depending on the speed of the fireball expansion.
