Abstract
CP violation in Bs 0–B¯s 0 oscillations is expected at the 10−5 level in the Standard Model but could be enhanced by New Physics. Using Bs 0→Ds −ℓ+νℓ decays, LHCb has recently reported the new result (0.39±0.33)×10−2 of the corresponding observable asl s. We point out that other current B decay data imply asl s=(0.004±0.075)×10−2. In view of this strong constraint, we propose to use Bs 0→Ds −ℓ+νℓ and similar flavor-specific decays as a new tool to determine both the production asymmetry between Bs 0 and B¯s 0 mesons, and the CP asymmetry in the subsequent Ds ± decays. The former serves as input for analyses of CP violation in Bs 0 channels, with significant room for improvement, while the latter offers an exciting laboratory for New Physics.
Original language | English |
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Pages (from-to) | 319-324 |
Number of pages | 6 |
Journal | Physics Letters. Section B : Nuclear, Elementary Particle and High-Energy Physics |
Volume | 770 |
DOIs | |
Publication status | Published - 10 Jul 2017 |
Funding
We would like to thank Marcel Merk and Vincenzo Vagnoni for useful discussions. This work is supported by the Foundation for Fundamental Research on Matter (FOM) and by the Deutsche Forschungsgemeinschaft (DFG) within research unit FOR 1873 (QFET).
Funders | Funder number |
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Deutsche Forschungsgemeinschaft | |
Stichting voor Fundamenteel Onderzoek der Materie |