arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.1861hep-ph
收藏

具有非零重子和同位旋化学势的Gross-Neveu模型中的π介子凝聚

Pion condensation in the Gross-Neveu model with nonzero baryon and isospin chemical potentials

D. Ebert, K. G. Klimenko

摘要:

研究了(1+1)维Gross-Neveu模型在零温和非零温下,在存在同位旋$μ_I$和夸克数$μ$化学势的情况下的性质.在极限$N_c\to\infty$中进行考虑,即在具有无限数量的色夸克的情况下。在参数$μ_I,μ$的平面中,发现了相当丰富的相结构,其中包含有和没有π凝聚的相。此外,我们还发现了这些相的各种单夸克激发,包括无隙和有隙准粒子。

英文摘要:

The properties of the two-flavored Gross-Neveu model in the (1+1)-dimensional spacetime are investigated in the presence of the isospin $μ_I$ as well as quark number $μ$ chemical potentials both at zero and nonzero temperatures. The consideration is performed in the limit $N_c\to\infty$, i.e. in the case with an infinite number of colored quarks. In the plane of parameters $μ_I,μ$ a rather rich phase structure is found, which contains phases with and without pion condensation. Moreover, we have found a great variety of one-quark excitations of these phases, including gapless and gapped quasiparticles.

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。

↑