Eur. Phys. J. A (2013) 49: 160
https://doi.org/10.1140/epja/i2013-13160-2

Regular Article - Theoretical Physics

Strange mass corrections to hyperonic semi-leptonic decays in statistical model

School of Physics and Material Science, Thapar University, Patiala, India

^* e-mail: mbatra310@gmail.com

Received: 23 October 2013
Revised: 2 December 2013
Accepted: 7 December 2013
Published online: 24 December 2013

Abstract

We study the spin distribution, weak decay coupling constant ratios for strange baryon octets with SU(3) breaking effects. Baryon is taken as an ensemble of quark-gluon Fock states in the sea with three valence quarks with definite spin, color and flavor quantum numbers. We apply the statistical model to calculate the probabilities of each Fock states, to analyze the impact of SU(3) breaking in the weak decays. The symmetry breaking effects are studied in terms of a parameter “r ” whose best-fit value is obtained from the experimental data of semi-leptonic weak decay coupling constant ratios. We suggest the dominant contribution from H₁G₈ (sea with spin one and color octet) where symmetry breaking corrections lead to the deviations in the value of the axial-vector matrix elements ratio F/D from experimental values by 17%. We conclude that symmetry breaking also significantly affects the polarization of quark in strange baryons.