• Open Access

Updated measurement of decay-time-dependent CP asymmetries in D0K+K and D0π+π decays

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. D 101, 012005 – Published 13 January 2020

Abstract

A search for decay-time-dependent charge-parity (CP) asymmetry in D0K+K and D0π+π decays is performed at the LHCb experiment using proton-proton collision data recorded at a center-of-mass energy of 13 TeV, and corresponding to an integrated luminosity of 5.4fb1. The D0 mesons are required to originate from semileptonic decays of b hadrons, such that the charge of the muon identifies the flavor of the neutral D meson at production. The asymmetries in the effective decay widths of D0 and D¯0 mesons are determined to be AΓ(K+K)=(4.3±3.6±0.5)×104 and AΓ(π+π)=(2.2±7.0±0.8)×104, where the uncertainties are statistical and systematic, respectively. The results are consistent with CP symmetry and, when combined with previous LHCb results, yield AΓ(K+K)=(4.4±2.3±0.6)×104 and AΓ(π+π)=(2.5±4.3±0.7)×104.

  • Figure
  • Figure
  • Figure
  • Received 3 November 2019

DOI:https://doi.org/10.1103/PhysRevD.101.012005

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

© 2020 CERN, for the LHCb Collaboration

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

Click to Expand

Article Text

Click to Expand

References

Click to Expand
Issue

Vol. 101, Iss. 1 — 1 January 2020

Reuse & Permissions
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

×

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×