Hyperon decay form factors in chiral perturbation theory

Lacour, A.; Meissner, U.G.; Kubis, B.

doi:10.1088/1126-6708/2007/10/083

Journal Article

PreJuSER-61442

Hyperon decay form factors in chiral perturbation theory

Lacour, A. ; Kubis, B. ; Meissner, U. G.FZJ*

2007
Springer Berlin

Journal of high energy physics 2007, 083 (2007) [10.1088/1126-6708/2007/10/083]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10502 doi:10.1088/1126-6708/2007/10/083

Abstract: We present a complete calculation of the SU(3)-breaking corrections to the hyperon vector form factors up to O(p(4)) in covariant baryon chiral perturbation theory. Partial higher-order contributions are obtained, and we discuss chiral extrapolations of the vector form factor at zero momentum transfer. In addition we derive low-energy theorems for the subleading moments in hyperon decays, the weak Dirac radii and the weak anomalous magnetic moments, up to O(p(4)).

Keyword(s): hyperon: semileptonic decay ; form factor: vector ; correction: higher-order ; perturbation theory: chiral ; symmetry breaking: SU(3) ; effective Lagrangian ; low-energy theorem ; baryon: magnetic moment ; numerical calculations ; Quark masses and SM parameters (auto) ; weak decays (auto) ; QCD (auto) ; Chiral Lagrangians (auto)