Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-09-16
JHEP 0811:051,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
40 pages, updated using phi_s from HFAG, conclusion unchanged
Scientific paper
10.1088/1126-6708/2008/11/051
We study flavor violation in a supersymmetric SU(5) grand unification scenario in a model-independent way employing mass insertions. We examine how the quark and the lepton sector observables restrict sfermion mixings. With a low soft scalar mass, a lepton flavor violating process provides a stringent constraint on the flavor structure of right-handed down-type squarks. In particular, mu -> e gamma turns out to be highly susceptible to the 1-3 and 2-3 mixings thereof, due to the radiative correction from the top Yukawa coupling to the scalar mass terms of 10. With a higher scalar mass around the optimal value, in contrast, the quark sector inputs such as B-meson mixings and hadron electric dipole moment, essentially determine the room for sfermion mixing. We also discuss the recent deviation observed in B_s mixing phase, projected sensitivity of forthcoming experiments, and ways to maintain the power of leptonic restrictions even after incorporating a solution to fix the incorrect quark-lepton mass relations.
Ko Pyungwon
Park Jae-hyeon
Yamaguchi Masahiro
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