Manifestly-covariant chiral PT calculation of nucleon Compton scattering

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dc.creatorLensky, Vadim
dc.creatorPascalutsa, Vladimir
dc.date2008-03-28
dc.date2008-12-16
dc.date.accessioned2026-07-07T13:04:35Z
dc.date.available2026-07-07T13:04:35Z
dc.descriptionWe compute the Compton scattering off the nucleons in the framework of manifestly covariant baryon chiral perturbation theory (B$χ$PT). The results for observables differ substantially from the corresponding calculations in heavy-baryon chiral perturbation theory (HB$χ$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 $Δ$(1232) resonance at order $p^4/\varDelta$, with $\varDelta\approx 300$ MeV, the resonance excitation energy. We find that the substantial effect of the $Δ$-excitation on the nucleon polarizabilities can naturally be accommodated in the manifestly covariant calculation.
dc.description6 pages, 4 figures, REVTeX; Major revision, the effect of Delta is computed entirely to order p^4 over the Delta-nulceon mass difference
dc.identifierhttps://arxiv.org/abs/0803.4115
dc.identifierhttp://arxiv.org/abs/0803.4115
dc.identifierPisma Zh.Eksp.Teor.Fiz.89:127-132,2009; JETP Lett.89:108-113,2009
dc.identifierdoi:10.1134/S0021364009030035
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227217
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titleManifestly-covariant chiral PT calculation of nucleon Compton scattering
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