Bose-Einstein condensation in linear sigma model at Hartree and large N approximation
classification
✦ hep-ph
keywords
approximationfinitehartreelargelimitlinearmodelsigma
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The BEC of charged pions is investigated in the framework of O(4) linear sigma model. By using Cornwall-Jackiw-Tomboulis formalism, we have derived the gap equations for the effective masses of the mesons at finite temperature and finite isospin density. The BEC is discussed in chiral limit and non-chiral limit at Hartree approximation and also at large N approximation.
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