| Abstract |
A measurement of the time-dependent CP-violating asymmetry in B0s脙垄脗聠脗聮脙聫脗聲脙聫脗聲 decays is presented. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.0 fb脙垄脗聢脗聮1 collected by the LHCb experiment at centre-of-mass energies s脙垄脗聢脗職 = 7 TeV in 2011, 8 TeV in 2012 and 13 TeV in 2015 and 2016, a signal yield of around 9000 B0s脙垄脗聠脗聮脙聫脗聲脙聫脗聲 decays is obtained. The CP-violating phase 脙聫脗聲ss脙聜脗炉脙聜脗炉脙聜脗炉ss is measured to be 脙垄脗聢脗聮0.073 脙聜脗卤 0.115(stat) 脙聜脗卤 0.027(syst) rad, under the assumption it is independent of the helicity of the 脙聫脗聲脙聫脗聲 decay. In addition, the CP-violating phases of the transverse polarisations under the assumption of CP conservation of the longitudinal phase are measured. The helicity-independent direct CP-violation parameter is also measured, and is found to be |脙聨脗禄| = 0.99 脙聜脗卤 0.05(stat) 脙聜脗卤 0.01(syst). In addition, T-odd triple-product asymmetries are measured. The results obtained are consistent with the hypothesis of CP conservation in b脙聜脗炉脙聜脗炉脙垄脗聠脗聮s脙聜脗炉脙聜脗炉脙聜脗炉ss脙聜脗炉脙聜脗炉脙聜脗炉s transitions. Finally, a limit on the branching fraction of the B0 脙垄脗聠脗聮 脙聫脗聲脙聫脗聲 decay is determined to be B(B0脙垄脗聠脗聮脙聫脗聲脙聫脗聲)<2.7脙聝脗聴10脙垄脗聢脗聮8 at 90 % confidence level. |
Mindanao State
University - Iligan Institute of Technology