Pion and Kaon Condensation at Finite Temperature and Density

Details Pion and Kaon Condensation at Finite Temperature and Density Pion and Kaon Condensation at Finite Temperature and Density

2006-09-04

arxiv.org/abs/hep-ph/0609020v3

Phys.Rev.D75:065011,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages. 7 Figures. v2: Better plots and figs. Added significant number of refs v3: Accepted for publication in PRD. Added a

Scientific paper

10.1103/PhysRevD.75.065011

In this paper, we study O(2N)-symmetric $\phi^4$-theory at finite temperature and density using the 2PI-1/N expansion. As specific examples, we consider pion condensation at finite isospin chemical potential and kaon condensation at finite chemical potential for hyper charge and isospin charge. We calculate the phase diagrams and the quasiparticle masses for pions and kaons in the large-N limit. It is shown that the effective potential and the gap equation can be renormalized by using local counterterms for the coupling constant and mass parameter, which are independent of temperature and chemical potentials.

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