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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2009, Volume 89, Issue 3, Pages 127–132
(Mi jetpl349)
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This article is cited in 17 scientific papers (total in 17 papers)
FIELDS, PARTICLES, AND NUCLEI
Manifestly-covariant $p^3$ calculation of nucleon Compton scattering
V. Lenskyab, V. Pascalutsaac a European Centre for Theoretical Studies in Nuclear Physics and
Related Areas
b Institute for Theoretical and Experimental Physics, 117218 Moscow,
Russia
c Institut für Kernphysik, Johannes Gutenberg Universität, Mainz D-55099, Germany
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 at order $p^4/\Delta$, with $\Delta\approx300$ MeV, the resonance excitation energy. We find that the substantial effect of the $\Delta$-excitation on the nucleon polarizabilities can naturally be accommodated in the manifestly covariant calculation.
Received: 05.11.2008
Citation:
V. Lensky, V. Pascalutsa, “Manifestly-covariant $p^3$ calculation of nucleon Compton scattering”, Pis'ma v Zh. Èksper. Teoret. Fiz., 89:3 (2009), 127–132; JETP Letters, 89:3 (2009), 108–113
Linking options:
https://www.mathnet.ru/eng/jetpl349 https://www.mathnet.ru/eng/jetpl/v89/i3/p127
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Abstract page: | 207 | Full-text PDF : | 81 | References: | 42 |
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