Limits on the Decay-Rate Difference of Neutral B Mesons and on CP, T, and CPT Violation in B0-B0bar Oscillations

Abstract

Using events in which one of two neutral B mesons from the decay of an Y(4S) meson is fully reconstructed, we determine parameters governing decay (ΔΓ_d/Γ_d), CP and T violation (|q/p|), and CP and CPT violation (Rez,Imz). The results, obtained from an analysis of 88 million Y(4S) decays recorded by BABAR, are -- sgn(Re(lambdaCP))ΔΓ_d/Gamma_d = -0.008 +- 0.037 +- 0.018 [ -0.084, 0.068 ] |q/p| = 1.029 +- 0.013 +- 0.011 [ 1.001, 1.057 ] Re(lambdaCP)/|lambdaCP| Rez = 0.014 +- 0.035 +- 0.034 [ -0.072, 0.101 ] Imz = 0.038 +- 0.029 +- 0.025 [ -0.028, 0.104 ]. -- The values inside square brackets indicate the 90% confidence-level intervals. These results are consistent with Standard Model expectations.

To appear in Phys.Rev.Lett. 7 pages, 1 figure

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• Improved Measurement of Mixing-induced CP Violation in the Neutral B Meson System
• Impact of tag-side interference on time-dependent CP asymmetry measurements using coherent B0 B0bar pairs
• Studies of B0-B0bar Mixing Properties with Inclusive Dilepton Events
• Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency with B0 --> D*- l+ nu_l Decays
• Measurement of the Oscillation Frequency for B0-Bobar Mixing using Hadronic B0 Decays
• Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency with B0 --> D*- l+ nu Decays
• Mesurement of the B0 - anti-B0 Mixing Parameter Delta m_d using Semileptonic B0 Decays

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