Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle gamma with B∓→D(*)K(*)∓ Decays
Name
Sanchez-2010-Evidence for Direct.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Zhao, M.
Fisher, Peter H
Cowan, Ray F
Alternative Title
Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle γ with B∓→D(*)K(*)∓ Decays
Date Issued
September 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
BABAR Collaboration et al. “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 (2010): 121801. © 2010 The American Physical Society.
Version
Final published version
Abstract
We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle gamma through a Dalitz plot analysis of neutral D-meson decays to KS0pi+pi- and KS0K+K- produced in the processes B∓→DK∓, B∓-->D*K∓ with D*-->Dpi0, Dgamma, and B∓→DK*∓ with K*∓-->KS0pi∓, using 468 million BB̅ pairs collected by the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We measure gamma=(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 gamma=0 (no direct CP violation) with a significance of 3.5 standard deviations.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.121801
