We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle γ through a Dalitz plot analysis of neutral D-meson decays to KS0π+π- and KS0K+K- produced in the processes B*→DK*, B *→D*K* with D *→Dπ0, Dγ, and B*→DK ** with K* *→KS0π*, using 468 million BB̄ pairs collected by the BABAR detector at the PEP-II asymmetric-energy e +e- collider at SLAC. We measure γ= (68±14±4±3)° (modulo 180°), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty in the description of the neutral D decay amplitudes. This result is inconsistent with γ=0 (no direct CP violation) with a significance of 3.5 standard deviations.

Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Tico, J., et al. (2010). Evidence for direct CP violation in the measurement of the cabbibo-kobayashi-maskawa angle γ with B*→D( *)K(*)* Decays. PHYSICAL REVIEW LETTERS, 105(12) [10.1103/PhysRevLett.105.121801].

Evidence for direct CP violation in the measurement of the cabbibo-kobayashi-maskawa angle γ with B*→D( *)K(*)* Decays

CARPINELLI, Massimo;
2010

Abstract

We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle γ through a Dalitz plot analysis of neutral D-meson decays to KS0π+π- and KS0K+K- produced in the processes B*→DK*, B *→D*K* with D *→Dπ0, Dγ, and B*→DK ** with K* *→KS0π*, using 468 million BB̄ pairs collected by the BABAR detector at the PEP-II asymmetric-energy e +e- collider at SLAC. We measure γ= (68±14±4±3)° (modulo 180°), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty in the description of the neutral D decay amplitudes. This result is inconsistent with γ=0 (no direct CP violation) with a significance of 3.5 standard deviations.
Articolo in rivista - Articolo scientifico
Scientifica
BABAR detector
English
P. del Amo Sanchez et al. (BABAR Collaboration)
Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Tico, J., et al. (2010). Evidence for direct CP violation in the measurement of the cabbibo-kobayashi-maskawa angle γ with B*→D( *)K(*)* Decays. PHYSICAL REVIEW LETTERS, 105(12) [10.1103/PhysRevLett.105.121801].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/389315
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