Calculation of B super(0) arrow right K super(0) mu super(+) mu super(-) and B super(0) sub()s arrow right [Phi] mu super(+) mu super(-) Observables Using Form Factors from Lattice QCD

We calculate the differential branching fractions and angular distributions of the rare decays B super(0) arrow right K* super(0) mu super(+) mu super(-) and B super(0) sub()s arrow right [Phi] mu super(+) mu super(-), using for the first time form factors from unquenched lattice QCD. We focus on th...

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Bibliographic Details
Published in:Physical review letters 2014-05, Vol.112 (21)
Main Authors: Horgan, Ronald R, Liu, Zhaofeng, Meinel, Stefan, Wingate, Matthew
Format: Article
Language:English
Subjects:
Angular distribution
Decay
Deviation
Form factors
Kinematics
Lattices
Mathematical models
Quantum chromodynamics
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Summary:We calculate the differential branching fractions and angular distributions of the rare decays B super(0) arrow right K* super(0) mu super(+) mu super(-) and B super(0) sub()s arrow right [Phi] mu super(+) mu super(-), using for the first time form factors from unquenched lattice QCD. We focus on the kinematic region where the K* or [phi] recoils softly; there, the newly available form factors are most precise and the nonlocal matrix elements can be included via an operator product expansion. Our results for the differential branching fractions calculated in the standard model are higher than the experimental data. We consider the possibility that the deviations are caused by new physics and perform a fit of the Wilson coefficients C sub(9) and C' sub(9) to the experimental data for multiple B super(0) arrow right K* super(0) mu super(+) mu super(-) and B super(0) sub()s arrow right [Phi] mu super(+) mu super(-) observables. In agreement with recent results from complementary studies, we obtain C sub(9) - C super(SM) sub(9) = -1.0 + or - 0.6 and C' sub(9) = 1.2 + or - 1.0, whose deviations from zero would indicate the presence of nonstandard fundamental interactions.
ISSN:0031-9007
1079-7114