Measurement of CP asymmetries in the decays B 0 → K *0 μ + μ − and B + → K + μ + μ −
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Aaij-2014-Measurement of CP as.pdf
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Author(s)
Counts, Ian Thomas Hunt
LHCb collaboration
Ilten, Philip J
Williams, Michael
Date Issued
September 2014
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag Berlin Heidelberg
Citation
Aaij, R., B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, et al. “Measurement of CP Asymmetries in the Decays B 0 → K *0 μ + μ − and B + → K + μ + μ −.” J. High Energ. Phys. 2014, no. 9 (September 2014).
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Final published version
Abstract
The direct CP asymmetries of the decays B 0 → K *0 μ + μ − and B + → K + μ + μ − are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector. The respective control modes B 0 → J/ψK *0 and B + → J/ψK + are used to account for detection and production asymmetries. The measurements are made in several intervals of μ + μ − invariant mass squared, with the ϕ(1020) and charmonium resonance regions excluded. Under the hypothesis of zero CP asymmetry in the control modes, the average values of the asymmetries are
ACP(B0→K∗0μ+μ−)=−0.035±0.024±0.003,ACP(B+→K+μ+μ−)=0.012±0.017±0.001,
where the first uncertainties are statistical and the second are due to systematic effects. Both measurements are consistent with the Standard Model prediction of small CP asymmetry in these decays.
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/JHEP09(2014)177
