Searching for New Physics with b→sτ^{+}τ^{-} Processes

Physical Review Letters
Bernat CapdevilaJoaquim Matias

Abstract

In recent years, intriguing hints for the violation of lepton flavor universality (LFU) have been accumulated in semileptonic B decays, both in the charged-current transitions b→cℓ^{-}ν[over ¯]_{ℓ} (i.e., R_{D}, R_{D^{*}}, and R_{J/ψ}) and the neutral-current transitions b→sℓ^{+}ℓ^{-} (i.e., R_{K} and R_{K^{*}}). Hints for LFU violation in R_{D^{(*)}} and R_{J/ψ} point at large deviations from the standard model (SM) in processes involving tau leptons. Moreover, LHCb has reported deviations from the SM expectations in b→sμ^{+}μ^{-} processes as well as in the ratios R_{K} and R_{K^{*}}, which together point at new physics (NP) affecting muons with a high significance. These hints for NP suggest the possibility of huge LFU-violating effects in b→sτ^{+}τ^{-} transitions. In this Letter, we predict the branching ratios of B→Kτ^{+}τ^{-}, B→K^{*}τ^{+}τ^{-}, and B_{s}→ϕτ^{+}τ^{-}, taking into account NP effects in the Wilson coefficients C_{9(^{'})}^{ττ} and C_{10(^{'})}^{ττ}. Assuming a common NP explanation of R_{D}, R_{D^{(*)}}, and R_{J/ψ}, we show that a very large enhancement of b→sτ^{+}τ^{-} processes, of around 3 orders of magnitude compared to the SM, can be expected under fairly general assumptions. We find that the branchi...Continue Reading

References

May 1, 1996·Physical Review. D·J L Hewett
Dec 12, 2012·Physical Review Letters·Svjetlana FajferJure Zupan
Nov 5, 2013·Physical Review Letters·Chris BouchardUNKNOWN HPQCD Collaboration
Apr 1, 2014·Physical Review Letters·Christoph BobethMatthias Steinhauser
Nov 7, 2014·Physical Review Letters·R AaijUNKNOWN LHCb Collaboration
Dec 30, 2014·Physical Review Letters·R AlonsoJ Martin Camalich
Apr 23, 2016·Physical Review Letters·Martin Bauer, Matthias Neubert
Jan 21, 2017·Physical Review Letters·Ferruccio FeruglioAndrea Pattori
Feb 6, 2017·Physical Review Letters·J P LeesUNKNOWN BaBar Collaboration
Mar 11, 2017·Physical Review Letters·Rodrigo AlonsoJorge Martin Camalich
Jul 12, 2017·Physical Review Letters·R AaijUNKNOWN LHCb Collaboration
Jan 1, 2017·The European Physical Journal. C, Particles and Fields·Marco CiuchiniMauro Valli

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Citations

Jul 22, 2018·Physical Review Letters·Monika Blanke, Andreas Crivellin

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