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Closed Access item SU(3)-breaking corrections to the hyperon vector coupling f(1)(0) in covariant baryon chiral perturbation theory

Authors:Geng, Li Sheng
Martín Cámalich, Jorge
Vicente Vacas, Manuel J.
Issue Date:20-May-2009
Publisher:American Physical Society
Citation:Physical Review D 79(9): 094022 (2009)
Abstract:We calculate the SU(3)-breaking corrections to the hyperon vector coupling f(1)(0) up to O(p(4)) in covariant baryon chiral perturbation theory with dynamical octet and decuplet contributions. We find that the decuplet contributions are of similar or even larger size than the octet ones. Combining both, we predict positive SU(3)-breaking corrections to all the four independent f(1)(0)'s (assuming isospin symmetry), which are consistent, within uncertainties, with the latest results from large N-c fits, chiral quark models, and quenched lattice QCD calculations.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevD.79.094022
URI:http://hdl.handle.net/10261/15930
ISSN:1550-7998
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