Higgs-induced flavor-changing neutral current as a source of new Physics in b→s transitions

Joshipura, Anjan S. ; Kodrani, Bhavik P. (2010) Higgs-induced flavor-changing neutral current as a source of new Physics in b→s transitions Physical Review D - Particles, Fields, Gravitation and Cosmology, 81 (3). 035013_1-035013_11. ISSN 1550-7998

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Official URL: http://prd.aps.org/abstract/PRD/v81/i3/e035013

Related URL: http://dx.doi.org/10.1103/PhysRevD.81.035013

Abstract

The experimental study of B mesons suggest the existence of some new physics contribution to the Bs0-B̅ s0 mixing. We study the implications of a hypothesis that this contribution is generated by the Higgs-induced flavor-changing neutral currents (FCNC). We concentrate on the specific b→s transition which is described by two complex FCNC parameters, F23 and F32, and parameters in the Higgs sector. Model-independent constraints on these parameters are derived from the Bs0-B̅s0 mixing and are used to predict the branching ratios for B̅s→ μ+μ̅ and B̅ d→ K̅ μ+μ- numerically by considering general variations in the Higgs parameters assuming that Higgs sector conserves CP. Taking the results on Bs0-B̅s0 mixing derived by the global analysis of UTfit group as a guide we present the general constraints on F23∗ F32 in terms of the pseudoscalar mass MA. The former is required to be in the range ˜(1-5)×10-11MA2GeV-2 if the Higgs-induced FCNC represent the dominant source of new physics. The phases of these couplings can account for the large CP violating phase in the Bs0-B̅ s0 mixing except when F23=F32. The Higgs contribution to B̅s→μ+μ- branching ratio can be large, close to the present limit while it remains close to the standard model value in case of the process B̅d→ K̅μ+μ- for all the models under study. We identify and discuss various specific examples which can naturally lead to suppressed FCNC in the K0-K̅ 0 mixing allowing at the same time the required values for F23∗ and F32.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:67613
Deposited On:31 Oct 2011 05:29
Last Modified:31 Oct 2011 05:29

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