Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays

Details Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays

2012-03-05

arxiv.org/abs/1203.0930v2

Phys. Rev. D 85, 071105(R) (2012)

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 3 figures, 2 tables, LaTeX; addition of supplemental information, corrections of typos, results unchanged

Scientific paper

10.1103/PhysRevD.85.071105

We report a new sensitive search for CPT violation, which includes improved measurements of the CPT-violating parameter z and the total decay-width difference normalized to the averaged width DeltaGamma_d/Gamma_d of the two Bd mass eigenstates. The results are based on a data sample of 535 x 10^6 BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We obtain Re(z) = [+1.9 +/- 3.7 (stat) +/- 3.3 (syst)] x 10^{-2}, Im(z) = [-5.7 +/- 3.3 (stat) +/- 3.3 (syst)] x 10^{-3}, and DeltaGamma_d/Gamma_d = [-1.7 +/- 1.8 (stat) +/- 1.1 (syst)] x 10^{-2}, all of which are consistent with zero. This is the most precise single measurement of these parameters in the neutral B-meson system to date.

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