We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle γ through a Dalitz plot analysis of neutral D-meson decays to K0Sπ+π− and K0SK+K− produced in the processes B∓→DK∓, B∓→D∗K∓ with D∗→Dπ0, Dγ, and B∓→DK*∓ with K*∓→K0Sπ∓, using 468 million BB⎯⎯⎯ 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.p., Poireau, V., Prencipe, E., Tisserand, V., Tico, J.g., et al. (2010). Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle gamma with B--/+ -> D-(*K-)(()*()-/+) Decays. PHYSICAL REVIEW LETTERS, 105(12), 1-7 [10.1103/PhysRevLett.105.121801].

Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle gamma with B--/+ -> D-(*K-)(()*()-/+) Decays

PATRIGNANI, CLAUDIA;
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 K0Sπ+π− and K0SK+K− produced in the processes B∓→DK∓, B∓→D∗K∓ with D∗→Dπ0, Dγ, and B∓→DK*∓ with K*∓→K0Sπ∓, using 468 million BB⎯⎯⎯ 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.
2010
Sanchez, P., Lees, J.p., Poireau, V., Prencipe, E., Tisserand, V., Tico, J.g., et al. (2010). Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle gamma with B--/+ -> D-(*K-)(()*()-/+) Decays. PHYSICAL REVIEW LETTERS, 105(12), 1-7 [10.1103/PhysRevLett.105.121801].
Sanchez, Pda; Lees, Jp; Poireau, V; Prencipe, E; Tisserand, V; Tico, Jg; Grauges, E; Martinelli, M; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/544537
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