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Measurement of CP violation in the phase space of B±→K+K−π± and B±→π+π−π± decays
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LHCb Collaboration (Including: Back, J. J., Craik, Daniel, Dossett, D., Gershon, T. J., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Wallace, Charlotte, Whitehead, M. (Mark) and Williams, M. P.). (2014) Measurement of CP violation in the phase space of B±→K+K−π± and B±→π+π−π± decays. Physical Review Letters, Volume 112 (Number 11). Article number 011801. doi:10.1103/PhysRevLett.112.011801 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.112.011801
Abstract
The charmless decays B±→K+K−π± and B±→π+π−π± are reconstructed in a data set of pp collisions with an integrated luminosity of 1.0 fb−1 and center-of-mass energy of 7 TeV, collected by LHCb in 2011. The inclusive charge asymmetries of these modes are measured to be ACP(B±→K+K−π±)=−0.141±0.040 (stat)±0.018 (syst)±0.007(J/ψ K±) and ACP(B±→π+π−π±)=0.117±0.021 (stat)±0.009 (syst)±0.007(J/ψ K±), where the third uncertainty is due to the CP asymmetry of the B±→J/ψK± reference mode. In addition to the inclusive CP asymmetries, larger asymmetries are observed in localized regions of phase space.
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