Measurement of the CP asymmetry in B0 -> K*0 mu+ mu- decays
LHCb collaboration: R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva,, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio,, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A.A. Alves Jr, S., Amato, Y. Amhis, L. Anderlini, J. Anderson
TL;DR
This paper reports a measurement of CP asymmetry in B0 -> K*0 mu+ mu- decays using LHCb data, finding results consistent with the Standard Model and employing control modes to correct for asymmetries.
Contribution
First measurement of CP asymmetry in B0 -> K*0 mu+ mu- decays across multiple invariant mass bins with control mode corrections.
Findings
Integrated CP asymmetry measured as -0.072 ± 0.040 (stat.) ± 0.005 (syst.)
Results are consistent with Standard Model predictions
Analysis covers six invariant mass bins excluding resonance regions
Abstract
A measurement of the CP asymmetry in B0 -> K*0 mu+ mu- decays is presented, based on 1.0fb-1 of pp collision data recorded by the LHCb experiment during 2011. The measurement is performed in six bins of invariant mass squared of the mu+ mu- pair, excluding the J/psi and psi(2S) resonance regions. Production and detection asymmetries are removed using the B0 -> J/Psi K*0 decay as a control mode. The integrated CP asymmetry is found to be -0.072 +- 0.040 (stat.) +- 0.005 (syst.), consistent with the Standard Model.
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