Measurement of the CP Asymmetry in B[superscript +] → K[superscript +]μ[superscript +]μ[superscript -] Decays
A measurement of the CP asymmetry in B[superscript +] → K[superscript +]μ[superscript +]μ[superscript −] decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb[superscript −1], recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV....
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/84926 https://orcid.org/0000-0001-8285-3346 |
| Summary: | A measurement of the CP asymmetry in B[superscript +] → K[superscript +]μ[superscript +]μ[superscript −] decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb[superscript −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 μ[superscript +]μ[superscript −] invariant mass squared in the range 0.05 < q[superscript 2] < 22.00 GeV[superscript 2]/c[superscript 4], excluding the J/ψ and ψ(2S) resonance regions. Production and detection asymmetries are corrected for using the B[superscript +] → J/ψK[superscript +] decay as a control mode. Averaged over all the bins, the CP asymmetry is found to be ACP= 0.000 ± 0.033 (stat) ± 0.005 (syst) ± 0.007 (J/ψK), where the third uncertainty is due to the CP asymmetry of the control mode. This is consistent with the standard model prediction. |
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