ul 2 00 1 B 0 d B 0 d Mixing and CPT tests at Belle Talk given at “ Frontiers in
نویسنده
چکیده
We present results on the mixing parameter ∆md and tests of the CPT symmetry in the B0 dB 0 d mixing from the time evolution of dilepton events on the Υ(4S) resonance. The analysis is based on a 5.9 fb−1 data sample collected by the Belle detector at the KEKB accelerator from January to July of 2001. We obtain ∆md = 0.463 ± 0.008 (stat) ± 0.016 (syst) ps−1. No evidence for CPT violation is found. This is the first determination of ∆md from time evolution measurements at Υ(4S), and the first time that an experimental limit on |mB0 d −mB0 d | /mB0 d
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