Measurement of Indirect C P-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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PhysRevD.90.111103.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
December 2014
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Aaltonen, T., et al. “Measurement of Indirect C P-Violating Asymmetries in D[superscript 0] → K[superscript +] K[superscript −] and D[superscript 0] → π[superscript +] π[superscript −] Decays at CDF.” Physical Review D, vol. 90, no. 11, Dec. 2014. © 2014 American Physical Society.
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Final published version
Abstract
We report a measurement of the indirect CP-violating asymmetries (A[subscript Γ]) between effective lifetimes of anticharm and charm mesons reconstructed in D[superscript 0]→K[superscript +]K[superscript -] and D[superscript 0] → π[superscript +]π[superscript -] decays. We use the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab experiment and corresponding to 9.7fb[superscript -1] of integrated luminosity. The strong-interaction decay D[superscript ∗+] →D[supercript 0]π[superscript +] is used to identify the meson at production as D[supercript 0] or D[superscript 0]. We statistically subtract D[superscript 0] and D[superscript 0] mesons originating from b-hadron decays and measure the yield asymmetry between anticharm and charm decays as a function of decay time. We measure A[subscript Γ](K[superscript +]K[superscript -]) =(-0.19±0.15 (stat) ± 0.04 (syst))% and A[subscript Γ](π[superscript +]π[superscript -]) = (-0.01±0.18 (stat) ± 0.03(syst))%. The results are consistent with the hypothesis of CP symmetry and their combination yields A[subscript Γ] = (-0.12±0.12)%.
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/PHYSREVD.90.111103
