Measurement of cp violation in the phase space of B ±→K±π+π- and B±→K±K+K- Decays

The LHCb Collaboration

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Abstract

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 ACP(B±→K±π +π-)=0.032±0.008 (stat)±0.004 (syst)±0.007(J/ψK±) and ACP(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 ACP(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.

Original languageEnglish
Article number101801
Number of pages9
JournalPhysical Review Letters
Volume111
Issue number10
DOIs
Publication statusPublished - 3 Sep 2013
Externally publishedYes

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