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The speed of cool soft pions

J. M. Martinez Resco, M. A. Valle Basagoiti

hep-pharXiv:hep-ph/9803472

Abstract

The speed of cool pions in the chiral limit is analytically computed at low temperature within the imaginary time formalism to two loop order. This evaluation shows a logarithmic dependence in the temperature where the scale within the logarithm is very large compared to the pion decay constant.

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