ρ self-energy at finite temperature and density in the real-time formalism

被引：13

作者：

Ghosh, Sabyasachi ^{[1
]}

Sarkar, Sourav ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Div Theoret Phys, Kolkata 700064, India

来源：

NUCLEAR PHYSICS A | 2011年 / 870-71卷

关键词：

rho self-energy; Hot and dense matter; Real-time formalism; Baryon loops; Landau cut; SPECTRAL-FUNCTION; FIELD-THEORY; MESON; DISCONTINUITIES; VECTOR;

D O I：

10.1016/j.nuclphysa.2011.09.001

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The rho meson self-energy in nuclear matter from baryonic loops is analysed in the real-time formulation of field theory at finite temperature and density. The discontinuities across the branch cuts of the self-energy function are evaluated for an exhaustive set of resonances in the loops considering the fully relativistic thermal baryon propagator including anti-baryons. Numerical calculations show a significant broadening of the rho spectral function coming from the Landau cut. Adding the contribution from mesonic loops, the full spectral function of the rho in a thermal gas of mesons, baryons and anti-baryons in equilibrium is evaluated at various values of temperature and baryonic chemical potential. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：94 / 111

页数：18

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