Evidence of time-dependent CP violation in the decay B0 to D*+D*-

Details Evidence of time-dependent CP violation in the decay B0 to D*+D*- Evidence of time-dependent CP violation in the decay B0 to D*+D*-

2009-01-26

arxiv.org/abs/0901.4057v2

Phys.Rev.D80:111104,2009

Physics

High Energy Physics

High Energy Physics - Experiment

Published in PRD

Scientific paper

10.1103/PhysRevD.80.111104

We report a measurement of the CP-odd fraction and the time-dependent CP violation in B0 to D*+D*- decays, using 657.10^6 BBbar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a CP-odd fraction of Rperp=0.125+/-0.043(stat)+/-0.023(syst). From the distributions of the proper-time intervals between a B0to D*+D*- decay and the other B meson in the event, we obtain evidence of CP violation with measured parameters AD*+D*-=0.15+/-0.13(stat)+/-0.04(syst) and SD*+D*-=-0.96+/-0.25(stat)-0.16+0.13(syst).

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