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Ryotaro Watanabe
순수물리이론 연구단
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SIMULTANEOUS EXPLANATION OF THE R-K AND R-D (*) PUZZLES: A MODEL ANALYSIS Highly Cited Paper

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Title
SIMULTANEOUS EXPLANATION OF THE R-K AND R-D (*) PUZZLES: A MODEL ANALYSIS
Author(s)
BHATTACHARYA, B; DATTA, A; GUEVIN, JP; LONDON, D; Ryotaro Watanabe
Publication Date
2017-01
Journal
JOURNAL OF HIGH ENERGY PHYSICS, v.2017, no.1, pp.015 -
Publisher
SPRINGER
Abstract
RK and RD(*) are two B-decay measurements that presently exhibit discrepancies with the SM. Recently, using an eective eld theory approach, it was demonstrated that a new-physics model can simultaneously explain both the RK and RD() puzzles. There are two UV completions that can give rise to the eective Lagrangian: (i) V B: a vector boson that transforms as an SU(2)L triplet, as in the SM, (ii) U1: an SU(2)L-singlet vector leptoquark. In this paper, we examine these models individually. A key point is that V B contributes to B0 s -B 0 s mixing and ! 3, while U1 does not. We show that, when constraints from these processes are taken into account, the V B model is just barely viable. It predicts B( ! +) ' 2:1108. This is measurable at Belle II and LHCb, and therefore constitutes a smoking-gun signal of V B. For U1, there are several observables that may point to this model. Perhaps the most interesting is the lepton- avor-violating decay (3S) ! , which has previously been overlooked in the literature. U1 predicts B((3S) ! )jmax = 8:0 107. Thus, if a large value of B((3S) ! ) is observed | and this should be measurable at Belle II | the U1 model would be indicated. (c) The Authors.
URI
http://pr.ibs.re.kr/handle/8788114/4031
DOI
10.1007/JHEP01(2017)015
ISSN
1029-8479
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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