The charmless decays B ±→K ±π +π - and B ±→K ±K +K - are reconstructed using data, corresponding to an integrated luminosity of 1.0 fb -1, collected by LHCb in 2011. The inclusive charge asymmetries of these modes are measured as A CP(B ±→K ±π +π -)=0.032±0.008 (stat)±0.004 (syst)±0.007(J/ψK ±) and A CP(B ±→K ±K +K -)=-0. 043±0.009 (stat)±0.003 (syst)±0.007(J/ψK ±), where the third uncertainty is due to the CP asymmetry of the B ±→J/ψK ± reference mode. The significance of A CP(B ±→K ±K +K -) exceeds three standard deviations and is the first evidence of an inclusive CP asymmetry in charmless three-body B decays. In addition to the inclusive CP asymmetries, larger asymmetries are observed in localized regions of phase space.
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)