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 B →D(*)K , D*→Dπ0, Dγ. Using a sample of 227×106 BB̄ 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-→D̄(*)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.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Measurement of the Cabibbo-Kobayashi-Maskawa angle γ in B →d(*)K decays with a dalitz analysis of D→KS0π-π+. PHYSICAL REVIEW LETTERS, 95(12) [10.1103/PhysRevLett.95.121802].

Measurement of the Cabibbo-Kobayashi-Maskawa angle γ in B →d(*)K decays with a dalitz analysis of D→KS0π-π+

CARPINELLI, Massimo;
2005

Abstract

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 B →D(*)K , D*→Dπ0, Dγ. Using a sample of 227×106 BB̄ 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-→D̄(*)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.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2005
95
12
121802
none
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Measurement of the Cabibbo-Kobayashi-Maskawa angle γ in B →d(*)K decays with a dalitz analysis of D→KS0π-π+. PHYSICAL REVIEW LETTERS, 95(12) [10.1103/PhysRevLett.95.121802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389822
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