Electromagnetic low-energy constants in ChPT

Details Electromagnetic low-energy constants in ChPT Electromagnetic low-energy constants in ChPT

2007-10-29

arxiv.org/abs/0710.5432v1

Eur.Phys.J.C53:549-557,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 4 Tables, 2 figures

Scientific paper

10.1140/epjc/s10052-007-0493-2

We investigate three-flavour chiral perturbation theory including virtual photons 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 particular we work out the strange quark mass dependence of the electromagnetic two-flavour low-energy constants C and k_i. We expect that these relations will be useful for a more precise determination of the electromagnetic low-energy constants.

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