Johan Bijnens, Niclas Danielsson, Timo A. Lähde
Partially Quenched Chiral Perturbation Theory to NNLO

Presented at Particles and Nuclei International Conference (PANIC 05), Santa Fe, New Mexico, 24-28 Oct 2005.

Abstract

This paper summarizes the recent calculations of the masses and decay constants of the pseudoscalar mesons at the two-loop level, or NNLO, in Partially Quenched Chiral Perturbation Theory (PQxPT). Possible applications include chiral extrapolations of Lattice QCD, as well as the determination of the low-energy constants (LEC:s) of QCD.

LU TP 05-48, hep-lat/0512016