The pion mass in finite volume to two loops
classification
✦ hep-lat
keywords
finiteloopsmasspionvolumeasymptoticchiralcompared
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We evaluate the pion mass in finite volume to two loops within Chiral Perturbation Theory. The results are compared with a recently proposed extension of the asymptotic formula of Luscher. We find that contributions, which were neglected in the latter, are numerically very small at the two-loop level.
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