Document type
ArticleVersion
Published versionPublication date
All rights reserved
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/135259
Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle γ with B∓→D(*)K(*)∓ Decays
Journal Title
Director/Tutor
Additional contribution
Journal ISSN
Volume Title
Abstract
We report the measurement of the Cabibbo-Kobayashi-Maskawa C P -violating angle γ through a Dalitz plot analysis of neutral D -meson decays to K 0 S π + π − and K 0 S K + K − produced in the processes B ∓ → D K ∓ , B ∓ → D ∗ K ∓ with D ∗ → D π 0 , D γ , and B ∓ → D K * ∓ with K * ∓ → K 0 S π ∓ , using 468 million B ¯¯¯ B 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 C P violation) with a significance of 3.5 standard deviations.
Related resource
Subject
Subject (English)
Citation
Citation
GARRA TICÓ, Jordi, GRAUGÉS POUS, Eugeni and BABAR Collaboration. Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle γ with B∓→D(*)K(*)∓ Decays. Physical Review Letters. 2010. Vol. 105, num. 12, pags. 121801. ISSN 0031-9007. [consulted: 5 of October of 2026]. Available at: https://hdl.handle.net/2445/135259