Integrating out strange quarks in ChPT
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
We study three flavour chiral perturbation theory in a limit where the strange quark mass is much larger than the external momenta and the up and down quark masses, and where the external fields are those of two-flavour chiral perturbation theory. In this case, the theory reduces to the one of SU(2)_L x SU(2)_R. Through this reduction, one can work out the strange quark mass dependence of the LECs in the two-flavour case. We present the pertinent relations at two-loop order for F,B and l_i.
Keywords
Cite
@article{arxiv.0706.0955,
title = {Integrating out strange quarks in ChPT},
author = {Jurg Gasser and Christoph Haefeli and Mikhail A. Ivanov and Martin Schmid},
journal= {arXiv preprint arXiv:0706.0955},
year = {2008}
}