piN scattering and electromagnetic corrections in the perturbative chiral quark model

Amand Faessler (Tuebingen U.); R. Vinh Mau (Paris U.); Th. Gutsche (Tuebingen U.); V. E. Lyubovitskij (Tuebingen U.)

arxiv: hep-ph/0108134 · v2 · submitted 2001-08-16 · ✦ hep-ph

piN scattering and electromagnetic corrections in the perturbative chiral quark model

V. E. Lyubovitskij (Tuebingen U.) , Th. Gutsche (Tuebingen U.) , Amand Faessler (Tuebingen U.) , R. Vinh Mau (Paris U.) This is my paper

classification ✦ hep-ph

keywords electromagneticchiralcorrectionsmodelperturbativequarkscatteringamplitude

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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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piN scattering and electromagnetic corrections in the perturbative chiral quark model

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