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Limits on the decay-rate difference of neutral B mesons and on CP, T, and CPT violation in B0B0 oscillations

Aubert, B. et al. (2004) Limits on the decay-rate difference of neutral B mesons and on CP, T, and CPT violation in B0B0 oscillations. Physical Review D, 70 (1). 012007. ISSN 1550-7998

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Abstract

Using events in which one of two neutral B mesons from the decay of an Υ(4S) resonance is fully reconstructed, we set limits on the difference between the decay rates of the two neutral B mass eigenstates and on CP, T, and CPT violation in B0B0 mixing. The reconstructed decays, comprising both CP and flavor eigenstates, are obtained from 88 million Υ(4S)→BB̅ decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We determine six independent parameters governing oscillations (Δm,ΔΓ/Γ), CPT and CP violation (Rez,Imz), and CP and T violation (ImλCP,|q/p|), where λCP characterizes B0 and B0 decays to states of charmonium plus KS0 or KL0. The results are sgn(ReλCP)ΔΓ/Γ=-0.008±0.037(stat.)±0.018(syst.)[-0.084,0.068],|q/p|=1.029±0.013(stat.)±0.011(syst.)[1.001,1.057],(ReλCP/|λCP|)Rez=0.014±0.035(stat.)±0.034(syst.)[-0.072,0.101],Imz=0.038±0.029(stat.)±0.025(syst.)[-0.028,0.104].The values inside square brackets indicate the 90% confidence-level intervals. The values of ImλCP and Δm are consistent with previous analyses and are used as cross checks. These measurements are in agreement with standard model expectations.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
Depositing User: Sharon Beastall
Date Deposited: 12 May 2011 09:04
Last Modified: 12 May 2011 09:04
URI: http://eprints.hud.ac.uk/id/eprint/10383

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