Measurement of the time-integrated CP asymmetry in D 0 → K 0S K 0S decays
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Abstract
The time-integrated CP asymmetry in the decay D 0 → K 0S K 0S is measured using 3 fb−1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The flavour of the D 0 meson is determined by use of the decay D *+ → D 0 π + and its charge conjugate mode. The result is
ACP=−0.029±0.052±0.022,
where the first uncertainty is statistical and the second systematic. The result is consistent with Standard Model expectations and improves the uncertainty with respect to the only previous measurement of this quantity by more than a factor of three
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Aaij, R., Adeva, B., Adinolfi, M. et al. Measurement of the time-integrated CP asymmetry in D 0 → K 0S K 0S decays. J. High Energ. Phys. 2015, 55 (2015). https://doi.org/10.1007/JHEP10(2015)055
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© CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made