A measurement of the CP asymmetry in B+ -> K+ mu(+)mu(-) decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb(-1), recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV. The measurement is performed in seven bins of mu(+)mu(-) invariant mass squared in the range 0.05 < q(2) < 22.00 GeV2/c(4), excluding the J/psi and psi(2S) resonance regions. Production and detection asymmetries are corrected for using the B+ -> J/psi K+ decay as a control mode. Averaged over all the bins, the CP asymmetry is found to be A(CP) = 0.000 +/- 0.033 (stat) +/- 0.005 (syst) +/- 0.007 (J/psi K), where the third uncertainty is due to the CP asymmetry of the control mode. This is consistent with the standard model prediction.

Measurement of the CP Asymmetry in B+ -> K+ mu(+) mu(-) Decays / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., S., A., S., A., Y., A., L., A., J., A., R., A., J. E., A., R. B., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 111:15(2013). [10.1103/physrevlett.111.151801]

Measurement of the CP Asymmetry in B+ -> K+ mu(+) mu(-) Decays

SARTI, ALESSIO;SCIUBBA, Adalberto;
2013

Abstract

A measurement of the CP asymmetry in B+ -> K+ mu(+)mu(-) decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb(-1), recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV. The measurement is performed in seven bins of mu(+)mu(-) invariant mass squared in the range 0.05 < q(2) < 22.00 GeV2/c(4), excluding the J/psi and psi(2S) resonance regions. Production and detection asymmetries are corrected for using the B+ -> J/psi K+ decay as a control mode. Averaged over all the bins, the CP asymmetry is found to be A(CP) = 0.000 +/- 0.033 (stat) +/- 0.005 (syst) +/- 0.007 (J/psi K), where the third uncertainty is due to the CP asymmetry of the control mode. This is consistent with the standard model prediction.
2013
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the CP Asymmetry in B+ -> K+ mu(+) mu(-) Decays / R., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., S., A., S., A., Y., A., L., A., J., A., R., A., J. E., A., R. B., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 111:15(2013). [10.1103/physrevlett.111.151801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/560393
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