1109.5849 (N. O. Agasian)

Low-energy theorems of QCD and bulk viscosity at finite temperature and
baryon density in a magnetic field    [PDF]

N. O. Agasian

The nonperturbative QCD vacuum at finite temperature and a finite baryon density in an external magnetic field is studied. Equations relating nonperturbative condensates to the thermodynamic pressure for $T\neq 0$, $\mu_q \neq 0$ and $H\neq 0$ are obtained, and low-energy theorems are derived. A bulk viscosity $\zeta(T, \mu, H)$ is expressed in terms of basic thermodynamical quantities describing the quark-gluon matter at $T\neq 0$, $\mu_q \neq 0$, and $H\neq 0$. Various limiting cases are also considered.

View original: http://arxiv.org/abs/1109.5849