Predictions of chiral perturbation theory for Compton scattering off protons

V. Lensky; V. Pascalutsa

Predictions of chiral perturbation theory for Compton scattering off protons

Nuclear Theory 2009-05-26 v1

Authors: V. Lensky , V. Pascalutsa

Abstract

We compute the Compton scattering off the nucleons in the framework of manifestly covariant baryon chiral perturbation theory (B $\chi$ PT). The results for observables differ substantially from the corresponding calculations in heavy-baryon chiral perturbation theory (HB $\chi$ PT), most appreciably in the forward kinematics. We verify that the covariant $p^3$ result fulfills the forward-Compton-scattering sum rules. We also explore the effect of the $\Delta$ (1232) resonance. We find that the substantial effect of the $\Delta$ -excitation on the nucleon polarizabilities can naturally be accommodated in the manifestly covariant calculation.

Keywords

compton scattering on nucleons chiral perturbation theory deep-inelastic scattering

Cite

@article{arxiv.0905.3861,
  title  = {Predictions of chiral perturbation theory for Compton scattering off protons},
  author = {V. Lensky and V. Pascalutsa},
  journal= {arXiv preprint arXiv:0905.3861},
  year   = {2009}
}

Comments

7 pages, 4 figures, to appear in in the proceedings of the International Workshop on Effective Field Theories: from the Pion to the Upsilon. EFT09, Valencia, 1-6 Feb. 2009

Predictions of chiral perturbation theory for Compton scattering off protons

Abstract

Keywords

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