# Limits on the decay-rate difference of neutral B mesons and on CP, T, and CPT violation in $B^0Bbar^0$ 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 (\Delta\Gamma_d/\Gamma_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))\Delta\Gamma_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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00021892
Contributor : Sabine Starita <>
Submitted on : Tuesday, July 4, 2006 - 11:32:56 AM
Last modification on : Wednesday, January 6, 2021 - 6:22:02 PM

### Citation

B. Aubert, R. Barate, D. Boutigny, J.M. Gaillard, A. Hicheur, et al.. Limits on the decay-rate difference of neutral B mesons and on CP, T, and CPT violation in $B^0Bbar^0$ oscillations. Physical Review Letters, American Physical Society, 2004, 92, pp.181801. ⟨in2p3-00021892⟩

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