2012/12/05 by Zhou Xing, Xing, Zhou
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle accelerators and beam dynamics #Particle physics theoretical and experimental studies #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.1212.1175
openalex publication_date 2012/12/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The CP violating asymmetry asl is studied with a sample of Bs0 or Bs0bar semi-muonic decays in proton-proton collisions at a centre-of-mass energy of 7 TeV at LHCb with an integrated luminosity of 1 fb-1. The final state studied is Dsμ, with Ds reconstructed in the final state ϕπ. The Dsμ yields are summed over untagged Bs0 and Bs0bar initial states, and integrated with respect to decay time. Data driven methods have been developed to measure all the efficiency ratios needed to determine asl from the measured raw asymmetry. We obtain asl= (-0.24+/-0.54+/-0.33)%, where the first uncertainty is statistical and the second systematic.