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arXiv 0903.2364hep-phnucl-th
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Nambu-Jona-Lasinio模型中平均场近似下的π介子超流性

Pion Superfluidity beyond Mean Field Approximation In Nambu--Jona-Lasinio Model

Chengfu Mu, Pengfei Zhuang

摘要:

本文在平均场近似下的双味Nambu-Jona-Lasinio模型框架下研究了π介子超流性。我们计算了热力学的下一个领先的顺序展开的颜色的倒数,包括夸克和介子的贡献,在有限的温度和重子和同位旋密度。由于介子涨落的存在,平均场水平上的Sarma相被冲走,低同位旋密度下的玻色-爱因斯坦凝聚区被高度抑制。

英文摘要:

We investigate pion superfluidity in the frame of two flavor Nambu--Jona-Lasinio model beyond mean field approximation. We calculate the thermodynamics to the next to leading order in an expansion in the inverse number of colors, including both quark and meson contributions at finite temperature and baryon and isospin density. Due to the meson fluctuations, the Sarma phase which exists at mean field level is washed away, and the Bose-Einstein condensation region at low isospin density is highly suppressed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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