We present a measurement of the time-dependent CP-violating asymmetries in decays of neutral B mesons to the final states D(*-/+)pi(+/-), using approximately 232x10(6) B (B) over bar events recorded by the BABAR experiment at the PEP-II e(+)e(-) storage ring. Events containing these decays are selected with a partial reconstruction technique, in which only the high-momentum pi(+/-) from the B decay and the low-momentum pi(-/+) from the D*-/+ decay are used. We measure the parameters related to 2 beta+gamma to be a(D*pi)=-0.034 +/- 0.014 +/- 0.009 and c(D*pi)(l)=-0.019 +/- 0.022 +/- 0.013. With some theoretical assumptions, we interpret our results in terms of the lower limits vertical bar sin(2 beta+gamma)vertical bar > 0.62(0.35) at 68% (90%) confidence level.

Measurement of time-dependent CP-violating asymmetries and constraints on sin(2 beta+gamma) with partial reconstruction of B -> D-*+/-pi(+/-) decays RID A-8798-2012 RID C-2728-2008 RID C-5223-2009 RID C-5719-2008 RID D-1055-2009

LUSIANI, Alberto;
2005

Abstract

We present a measurement of the time-dependent CP-violating asymmetries in decays of neutral B mesons to the final states D(*-/+)pi(+/-), using approximately 232x10(6) B (B) over bar events recorded by the BABAR experiment at the PEP-II e(+)e(-) storage ring. Events containing these decays are selected with a partial reconstruction technique, in which only the high-momentum pi(+/-) from the B decay and the low-momentum pi(-/+) from the D*-/+ decay are used. We measure the parameters related to 2 beta+gamma to be a(D*pi)=-0.034 +/- 0.014 +/- 0.009 and c(D*pi)(l)=-0.019 +/- 0.022 +/- 0.013. With some theoretical assumptions, we interpret our results in terms of the lower limits vertical bar sin(2 beta+gamma)vertical bar > 0.62(0.35) at 68% (90%) confidence level.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/4371
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