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.
Archilli, F., Carboni, G., Santovetti, E., The LHCb, C. (2013). Measurement of the CP Asymmetry in B+ -> K+ mu(+) mu(-) Decays. PHYSICAL REVIEW LETTERS, 111(15) [10.1103/PhysRevLett.111.151801].
Measurement of the CP Asymmetry in B+ -> K+ mu(+) mu(-) Decays
Archilli, FMembro del Collaboration Group
;Carboni, GMembro del Collaboration Group
;Santovetti, EMembro del Collaboration Group
;
2013-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
