Search for physics beyond the Standard Model using measurements of CP violating asymmetries in rare B meson decays: Neutral B meson decaying to neutral kaon(short)-neutral pion and neutral B meson decaying to neutral kaon(short)-neutral pion-gamma.

摘要

This dissertation presents measurements of time-dependent CP violating asymmetries in the decays B 0 → K0Sp0 and B0 → K0Sp0g based on RUN 1-4 data collected with the BABAR detector at the Upsilon (4S) resonance operating at the PEP-II asymmetric e+e- collider at SLAC. It was found that the CP violating asymmetry parameters are SKSp0 = 0.35+0.30-0.33 (stat) +/- 0.04(syst), CKSp0 = 0.06 +/- 0.18(stat) +/- 0.03(syst), SK*0g = -0.21 +/- 0.40(stat) +/- 0.05(syst), CK*0g = -0.40 +/- 0.23(stat) +/- 0.03(syst), SKSp0g = 0.9 +/- 1.0(stat) +/- 0.2(syst) and CKSp0g = -1.0 +/- 0.5(stat) +/- 0.2(syst), where B 0 → K*0 g decays correspond to the KSp0 invariant mass interval of [0.8,1.0] GeV and B 0 → K0Sp0g of [1.1,1.8] GeV. All results are consistent with the Standard Model predictions.