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Phys. Rev. Lett. 95, 121802 (2005) [7 pages]

Measurement of the Cabibbo-Kobayashi-Maskawa Angle γ in BD(*)K Decays with a Dalitz Analysis of DKS0π-π+

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B. Aubert et al. BABAR Collaboration
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Received 20 April 2005; published 14 September 2005

We report on a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase γ through a Dalitz analysis of neutral D decays to KS0π-π+ in the processes BD(*)K, D*Dπ0, Dγ. Using a sample of 227×106 BB̅ pairs collected by the BABAR detector, we measure the amplitude ratios rB=0.12±0.08±0.03±0.04 and rB*=0.17±0.10±0.03±0.03, the relative strong phases δB=(104±45-21-24+17+16 and δB*=(-64±41-12+14±15)° between the amplitudes A(B-D̅ (*)0K-) and A(B-D(*)0K-), and γ=(70±31-10-11+12+14. The first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the Dalitz model uncertainty. The results for the strong and weak phases have a twofold ambiguity.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.121802
DOI:
10.1103/PhysRevLett.95.121802
PACS:
13.25.Hw, 11.30.Er, 12.15.Hh, 13.25.Ft