Studies of B0-B0 mixing properties with inclusive dilepton events
Abstract
We report a precise determination of the B0-B0 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 fb-1 recorded at the Υ(4S) resonance and 3.0 fb-1 recorded at an energy 60 MeV below the resonance, we measure Δmd=[0.503±0.008(stat)±0.010(syst)] ps-1. 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 B0-B0 mixing, <frak>R</frak>(cos θ)=0.00±0.12(stat)±0.01(syst) and <frak>I</frak>(cos θ)=0.03±0.01(stat)±0.03(syst).
- Publication:
-
Physical Review D
- Pub Date:
- March 2003
- DOI:
- 10.1103/PhysRevD.67.052004
- arXiv:
- arXiv:hep-ex/0212033
- Bibcode:
- 2003PhRvD..67e2004H
- Keywords:
-
- 13.66.Bc;
- 13.25.Gv;
- 14.40.Gx;
- Hadron production in e<sup>-</sup>e<sup>+</sup> interactions;
- Decays of J/psi Upsilon and other quarkonia;
- Mesons with S=C=B=0 mass>2.5 GeV;
- High Energy Physics - Experiment
- E-Print:
- Seven pages, two figures. Published in PRD