We present an updated measurement of the CP-odd fraction and the time-dependent CP asymmetries in the decay B(0)-> D*(+)D*(-) using (383 +/- 4)x10(6)B (B) over bar pairs collected with the BABAR detector. We determine the CP-odd fraction to be 0.143 +/- 0.034(stat)+/- 0.008(syst). The time-dependent CP asymmetry parameters are determined to be C(+)=-0.05 +/- 0.14(stat)+/- 0.02(syst) and S(+)=-0.72 +/- 0.19(stat)+/- 0.05(syst). The nonzero value of the measured S(+) indicates the evidence of CP violation at the 3.7 sigma confidence level.
Improved measurement of time-dependent CP asymmetries and the CP-odd fraction in the decay B(0)-> D*(+)D*(-) RID C-5223-2009 RID C-5719-2008 RID D-1055-2009
LUSIANI, Alberto;
2007
Abstract
We present an updated measurement of the CP-odd fraction and the time-dependent CP asymmetries in the decay B(0)-> D*(+)D*(-) using (383 +/- 4)x10(6)B (B) over bar pairs collected with the BABAR detector. We determine the CP-odd fraction to be 0.143 +/- 0.034(stat)+/- 0.008(syst). The time-dependent CP asymmetry parameters are determined to be C(+)=-0.05 +/- 0.14(stat)+/- 0.02(syst) and S(+)=-0.72 +/- 0.19(stat)+/- 0.05(syst). The nonzero value of the measured S(+) indicates the evidence of CP violation at the 3.7 sigma confidence level.File in questo prodotto:
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