Modification of the unitarity relation for sin2 beta-V-ub in supersymmetric models

作者：Dutta Bhaskar^*; Mimura Yukihiro

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, 75(1): 015006.

DOI：10.1103/PhysRevD.75.015006

Recently, a more than 2 sigma discrepancy has been observed between the well measured inclusive value of V-ub and the predicted value of V-ub from the unitarity triangle fit using the world average value of sin2 beta. We attempt to resolve this tension in the context of grand unified SO(10) and SU(5) models where the neutrino mixing matrix is responsible for flavor changing neutral current at the weak scale and the models with nonproportional A-terms (can be realized simply in the context of intersecting D-brane models) and investigate the interplay between the constraints arising from B-s,B-d-< over bar > B < over bar >(s,d) mixings, epsilon(K), Br(tau ->mu gamma), Br(mu -> e gamma) and a fit of this new discrepancy. We also show that the ongoing measurement of the phase of B-s mixing will be able to identify the grand unified model. The measurement of Br(tau -> e gamma) will also be able to test these scenarios, especially the models with nonproportional A-terms.

• 出版日期2007-1