Search for CP violation in D[superscript ±] → K[0 over S] K[superscript ±] and D[± over s] → K[0 over S]π[superscript ±] decays
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Aaij-2014-Search for CP violat.pdf
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Author(s)
Counts, Ian Thomas Hunt
Ilten, Philip J
Williams, Michael
Date Issued
October 2014
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Aaij, R., B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, et al. “Search for CP Violation in D[superscript ±] → K[0 over S] K[superscript ±] and D[± over s] → K[0 over S]π[superscript ±] Decays.” J. High Energ. Phys. 2014, no. 10 (October 2014).
Version
Final published version
Abstract
A search for CP violation in Cabibbo-suppressed D[superscript ±] → K[0 over S] K[superscript ±] and D[± over s] → K[0 over S]π[superscript ±] decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb, recorded by the LHCb experiment. The individual CP-violating asymmetries are measured to be
A[D± over CP] → K[0 over S]K[superscript ±] = (+0.03 ± 0.17 ± 0.14)%
A[D [± over s] over CP] → K[0 over S]π[superscript ±] = (+0.38 ± 0.46 ± 0.17)%,
assuming that CP violation in the Cabibbo-favoured decays is negligible. A combination of the measured asymmetries for the four decay modes D[± over (s) → K[0 over S]K[superscript ±] and D[± over (s) → K[0 over S]π[superscript ±] gives the sum
A[D±→K[0 over S]K[superscript] over CP] + A[D±s→K[0 over S]π[superscript ±] over CP] = (+0.41 ± 0.49 ± 0.26)%.
In all cases, the first uncertainties are statistical and the second systematic. The results represent the most precise measurements of these asymmetries to date and show no evidence for CP violation.
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/10.1007/jhep10(2014)025
