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Time dependence in BV ℓℓ decays

Open Access
Regular Article - Theoretical Physics

Abstract

We discuss the theory and phenomenology of B d,s V (→ M1M2)ℓℓ decays in the presence of neutral-meson mixing. We derive expressions for the time-dependent angular distributions for decays into CP eigenstates, and identify the relevant observables that can be extracted from time-integrated and time-dependent analyses with or without tagging, with a focus on the difference between measurements at B-factories and hadronic machines. We construct two observables of interest, which we call Q 8 and Q9, and which are theoretically clean at large recoil. We compute these two observables in the Standard Model, and show that they have good potential for New Physics searches by considering their sensitivity to benchmark New Physics scenarios consistent with current bsℓℓ data. These results apply to decays such as B d K(→ K S π0)ℓℓ, B s ϕ(→ K S K L )ℓℓ and B s ϕ(→ K+K)ℓℓ.

Keywords

Rare Decays Beyond Standard Model B-Physics Standard Model 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2015

Authors and Affiliations

  1. 1.Laboratoire de Physique Théorique, CNRS/Univ. Paris-Sud (UMR 8627)Orsay CedexFrance
  2. 2.Theoretische Physik 1, Naturwissenschaftlich-Technische FakultätUniversität SiegenSiegenGermany

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