### Thermal pions at a finite isospin chemical potential

### Abstract

The density corrections, in terms of the isospin chemical potential ?1, to the mass of the pions are studied in the framework of the SU(2) low-energy effective chiral Lagrangian.The pion decay constant f ?(T,?1) is also analyzed. As a function of temperature for ?1=0, the mass remains quite stable, starting to grow for very high values of T, confirming previous results. However, there are interesting corrections to the mass when both effects (temperature and chemical potential) are simultaneously present. At zero temperature the ?± should condensate when ?1,= ±m ?. This is no longer valid at finite T. The mass of ?0 acquires also a nontrivial dependence on ?1 due to the finite temperature. © 2003 The American Physical Society.

### Más información

Título según WOS: | Thermal pions at a finite isospin chemical potential |

Título según SCOPUS: | Thermal pions at-a finite isospin chemical potential |

Título de la Revista: | PHYSICAL REVIEW D |

Volumen: | 67 |

Número: | 7 |

Editorial: | American Physical Society |

Fecha de publicación: | 2003 |

Idioma: | English |

DOI: |
10.1103/PhysRevD.67.074034 |

Notas: | ISI, SCOPUS |