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APS » Journals » Phys. Rev. D » Volume 71 » Issue 11
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Phys. Rev. D 71, 112003 (2005) [17 pages]

Measurement of time-dependent CP-violating asymmetries and constraints on sin⁡(2β+γ) with partial reconstruction of B→D*∓π± decays

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B. Aubert et al. BABAR Collaboration
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Received 20 April 2005; published 21 June 2005

We present a measurement of the time-dependent CP-violating asymmetries in decays of neutral B mesons to the final states D*∓π±, using approximately 232×106 BB̅ 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 π± from the B decay and the low-momentum π∓ from the D*∓ decay are used. We measure the parameters related to 2β+γ to be aD*π=-0.034±0.014±0.009 and cD*πℓ=-0.019±0.022±0.013. With some theoretical assumptions, we interpret our results in terms of the lower limits |sin⁡(2β+γ)|>0.62(0.35) at 68% (90%) confidence level.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.71.112003
DOI:
10.1103/PhysRevD.71.112003
PACS:
13.25.Hw, 11.30.Er, 12.15.Hh
 
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