Aspects of Nucleon Compton Scattering

A. Schmidt; N. Kaiser; Ulf-G. Mei{\ss}ner; V. Bernard

Aspects of Nucleon Compton Scattering

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arxiv hep-ph/9311354 v1 pith:AIFXRZDN submitted 1993-11-24 hep-ph nucl-th

V. Bernard , N. Kaiser , Ulf-G. Mei{ss}ner , A. Schmidt This is my paper

classification hep-phnucl-th

keywords comptonchiralnucleonscatteringamplitudeforwardorderspin-averaged

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abstract

We consider the spin-averaged nucleon forward Compton scattering amplitude in heavy baryon chiral perturbation theory including all terms to order ${\cal O} (q^4)$. The chiral prediction for the spin-averaged forward Compton scattering amplitude is in good agreement with the data for photon energies $\omega \le 110$ MeV. We also evaluate the nucleon electric and magnetic Compton polarizabilities to this order and discuss the uncertainties of the various counter terms entering the chiral expansion of these quantities.

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