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EnglishWe 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 BB̅ 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.
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| Titolo: | Evidence for direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with B-+ ---> D(*) K(*)-+ decays. |
| Autori: | |
| Data di pubblicazione: | 2010 |
| Rivista: | |
| 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 BB̅ 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. |
| Handle: | http://hdl.handle.net/11391/931600 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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