Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-09
Phys.Rev. D65 (2002) 074002
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, REVTEX
Scientific paper
10.1103/PhysRevD.65.074002
We obtain a model-independent expression for the complete Dalitz plot of semileptonic decays of polarized hyperons, which includes both the three-body and the four-body regions. We calculate radiative corrections to order alpha, neglecting terms of order alpha q/(pi M_1), where q is the four-momentum transfer and M_1 is the mass of the decaying hyperon. Our results exhibit explicitly the correlation between the emitted hyperon three-momentum and the spin of the decaying hyperon. This allows us to obtain the corresponding radiative corrections to the integrated emitted hyperon spin-asymmetry coefficient. Our formulas are valid for charged as well as for neutral decaying hyperons and are appropriate for model-independent experimental analysis whether the real photon is discriminated or not.
Flores-Mendieta Ruben
Garcia Arnaldo
Martínez Alan
Torres Javier
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