Measurement of the flavour-specific CP-violating asymmetry a ssl in B 0s decays
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Journal Volume
728
Pages
607-615
Date Issued
2014
Author(s)
Aaij, R. et al. (LHCb Collaboration)
Abstract
The CP-violating asymmetry View the MathML sourceasls is studied using semileptonic decays of View the MathML sourceBs0 and View the MathML sourceB?s0 mesons produced in pp collisions at a centre-of-mass energy of 7 TeV at the LHC, exploiting a data sample corresponding to an integrated luminosity of 1.0 fb?11.0 fb?1. The reconstructed final states are View the MathML sourceDs�ӣg?, with the View the MathML sourceDs�� particle decaying in the ?�k��?�k�� mode. The View the MathML sourceDs�ӣg? yields are summed over View the MathML sourceB?s0 and View the MathML sourceBs0 initial states, and integrated with respect to decay time. Data-driven methods are used to measure efficiency ratios. We obtain View the MathML sourceasls=(?0.06��0.50��0.36)%, where the first uncertainty is statistical and the second systematic.
Type
journal article