piN scattering and electromagnetic corrections in the perturbative chiral quark model

Details piN scattering and electromagnetic corrections in the perturbative chiral quark model piN scattering and electromagnetic corrections in the perturbative chiral quark model

2001-08-16

arxiv.org/abs/hep-ph/0108134v2

Phys.Lett. B520 (2001) 204-212

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 2 figures

Scientific paper

10.1016/S0370-2693(01)01142-X

We apply the perturbative chiral quark model to give predictions for the electromagnetic O(p^2) low-energy couplings of the ChPT effective Lagrangian that define the electromagnetic mass shifts of nucleons and first-order (e^2) radiative corrections to the piN scattering amplitude. We estimate the leading isospin-breaking correction to the strong energy shift of the pi(-)p atom in the 1s state, which is relevant for the experiment "Pionic Hydrogen" at PSI.

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