Measurement of the Difference in CP-Violating Asymmetries in D[superscript 0]→K[superscript +]K[superscript -] and D[superscript 0]→π[superscript +]π[superscript -] Decays at CDF
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Aaltonen-2012-Measurement of the Difference in CP-Violating Asymmetries.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
September 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Measurement of the Difference in CP-Violating Asymmetries in D[superscript 0]→K[superscript +]K[superscript -] and D[superscript 0]→π[superscript +]π[superscript -] Decays at CDF.” Physical Review Letters 109.11 (2012). © 2012 American Physical Society
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Final published version
Abstract
We report a measurement of the difference (ΔACP) between time-integrated CP-violating asymmetries in D[superscript 0]→K[superscript +]K[superscript -] and D[superscript 0]→π[superscript +]π[superscript -] decays reconstructed in the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab, corresponding to 9.7 fb[superscript -1] of integrated luminosity. The strong decay D[superscript *+]→D[superscript 0]π[superscript +] is used to identify the charm meson at production as D[superscript 0] or D̅[superscript 0]. We measure ΔACP=[-0.62±0.21(stat)±0.10(syst)]%, which differs from zero by 2.7 Gaussian standard deviations. This result supports similar evidence for CP violation in charm-quark decays obtained in proton-proton collisions.
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.109.111801
