University of Minnesota
School of Physics & Astronomy

Nuclear Physics Seminar

Thursday, December 6th 2007
2:30 pm:
Nuclear Physics Seminar in 435 Physics
Speaker: Scott Bowman, University of Minnesota
Subject: Linear Sigma Model at Finite Temperature and Isospin Chemical Potential

In relativistic heavy ion collisions large numbers of pions are created. It may be possible for these pions to condense into the zero-momentum state, i.e. form a Bose-Einstein condensate. Pions have the special property of being Goldstone bosons of the spontaneously broken chiral symmetry of QCD. The O(N)-symmetric linear sigma model is used as an effective low energy model for QCD to understand the relationship between chiral symmetry breaking and Bose-Einstein condensation. This has recently been studied by Shu and Li and by Andersen. Shu and Li use the framework of the Cornwall-Jackiw-Tomboulis formalism and the 1/N approximation, while Andersen uses the 2PI (Phi derivable) method. I will review their work and attempt to go further in understanding the thermodynamic properties of the sytem.

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