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.
|Number of pages||6|
|Journal||Physics Letters. Section B : Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 10 Jul 2017|