Studies of B0B0 mixing properties with inclusive dilepton events

N. C. Hastings et al. (Belle Collaboration)
Phys. Rev. D 67, 052004 – Published 18 March 2003
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Abstract

We report a precise determination of the B0B0 mixing parameter Δmd based on the time evolution of same-sign and opposite-sign dilepton yields in Υ(4S) decays. Data were collected with the Belle detector at KEKB. Using data samples of 29.4 fb1 recorded at the Υ(4S) resonance and 3.0 fb1 recorded at an energy 60 MeV below the resonance, we measure Δmd=[0.503±0.008(stat)±0.010(syst)]ps1. From the same analysis, we also measure the ratio of charged and neutral B meson production at the Υ(4S), f+/f0=1.01±0.03(stat)±0.09(syst), and CPT violation parameters in B0B0 mixing, R(cosθ)=0.00±0.12(stat)±0.01(syst) and I(cosθ)=0.03±0.01(stat)±0.03(syst).

  • Received 12 December 2002

DOI:https://doi.org/10.1103/PhysRevD.67.052004

©2003 American Physical Society

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Vol. 67, Iss. 5 — 1 March 2003

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