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Short Communication Open Access

Pion-Pion Elastic Scattering, Dynamical Generation of the f0(500) Resonance, Nite-temperature e ects and Chiral Restoration: A Large-N Approach

Abstract

In this work, we discuss and summarize three large N approaches given to analyze how a set of massless pions behave at nite temperature. The first one focuses in the problem of obtaining thermal phase shifts, where the others aim to study chiral symmetry restoration phenomena. All the results are achieved by considering an O(N + 1)/O(N) nonlinear sigma model where N is the number of pions (or Nambu-Goldstone bosons) involved, in which thermal e ects are introduced via the imaginary time formalism.

Santiago C, Nicola AG, John Morales and Jose RR

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