https://doi.org/10.1140/epja/i2010-10942-x
Regular Article - Theoretical Physics
Extraction of the CKM matrix element Vus from the hyperon semileptonic decays
Department of Physics, Dr. B.R. Ambedkar National Institute of Technology, 144011, Jalandhar, India
* e-mail: dahiyah@nitj.ac.in
Received:
5
January
2010
Revised:
22
February
2010
Accepted:
22
February
2010
Published online:
21
March
2010
The chiral constituent quark model with configuration mixing ( 
CQM
config , which is successful in explaining the weak vector and axial-vector form factors for the strangeness-changing as well as strangeness-nonchanging hyperon semileptonic decays at Q
2 = 0 , has been extended to determine the CKM matrix element V
us for the strangeness-changing decays. The implications of the effect of the SU(3) symmetry breaking, Q2-dependence and radiative corrections on the form factors and V
us have also been investigated. It is found that the results with SU(3) symmetry breaking show considerable improvement over the SU(3) symmetric results when compared with the existing experimental data. The inclusion of the Q2-dependence and radiative corrections in form factors have only a small effect on the prediction of V
us as is expected from the theory.
© SIF, Springer-Verlag Berlin Heidelberg, 2010
