Measurement of CP violation in B-0 -> D+D- decays
File(s)PhysRevLett.117.261801.pdf (298.12 KB)
Published version
Author(s)
Type
Journal Article
Abstract
The CP violation observables S and C in the decay channel B0 → DþD− are determined from a sample of proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to an integrated luminosity of 3 fb−1. The observable S describes CP violation in the interference between mixing and the decay amplitude, and C parametrizes direct CP violation in the decay. The following values are obtained from a flavor-tagged, decay-time-dependent analysis: S ¼ −0.54þ0.17 −0.16 ðstatÞ 0.05ðsystÞ, C ¼ 0.26þ0.18 −0.17 ðstatÞ 0.02ðsystÞ. These values provide evidence for CP violation at a significance level of 4.0 standard deviations. The phase shift due to higher-order standard model corrections is constrained to a small value of Δϕ ¼ −0.16þ0.19 −0.21 rad.
Date Issued
2016-12-23
Date Acceptance
2016-12-01
ISSN
1079-7114
Publisher
American Physical Society
Journal / Book Title
Physical Review Letters
Volume
117
Issue
26
Copyright Statement
© 2016 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License (https://creativecommons.org/licenses/by/3.0/).
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000390301400002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
TOOL
hep-ex
General Physics
02 Physical Sciences
Publication Status
Published
Article Number
ARTN 261801