## Search for CP violation in D[superscript ±] → K[0 over S] K[superscript ±] and D[± over s] → K[0 over S]π[superscript ±] decays

##### Author(s)

Counts, Ian Thomas Hunt; Ilten, Philip James; Williams, M.
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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.

##### Date issued

2014-10##### Department

Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science##### 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

##### ISSN

1029-8479

1126-6708