Measurement of the CP Violation Parameter A[subscript Γ] in D[superscript 0] → K[superscript +] K[superscript −] and D[superscript 0] → π[superscript +] π[superscript −] Decays
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PhysRevLett.118.261803.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Alkhazov, G.
Alternative Title
Measurement of the CP Violation Parameter A Γ in D 0 → K + K − and D 0 → π + π − Decays
Date Issued
June 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R. et al. “Measurement of the CP Violation Parameter A[subscript Γ] in D[superscript 0] → K[superscript +] K[superscript −] and D[superscript 0] → π[superscript +] π[supescript −] Decays.” Physical Review Letters 118.26 (2017): n. pag.
Version
Final published version
Abstract
Asymmetries in the time-dependent rates of D[superscript 0]→K[superscript +]K[superscript -] and D[superscript 0] →π[superscript +]π[superscript -] decays are measured in a pp collision data sample collected with the LHCb detector during LHC Run 1, corresponding to an integrated luminosity of 3 fb[superscript -1]. The asymmetries in effective decay widths between D[superscript 0] and [¯0 over D] decays, sensitive to indirect CP violation, are measured to be A[subscript Γ](K[superscript +]K[superscript -])=(-0.30±0.32±0.10)×10[superscript -3] and A[subscript Γ](π[superscript +]π[superscript -])=(0.46±0.58±0.12)×10[superscript -3], where the first uncertainty is statistical and the second systematic. These measurements show no evidence for CP violation and improve on the precision of the previous best measurements by nearly a factor of two.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.118.261803
