The speed of cool soft pions
arXiv:hep-ph/9803472 · doi:10.1103/PhysRevD.58.097901
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.
10 pages, 2 figures.A few typos corrected,some comments added.Version to be published in Phys. Rev. D