Observation of Several Sources of CP Violation in B+ →π+π+π- Decays

LHCb Collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Observations are reported of different sources of CP violation from an amplitude analysis of B^{+}→π^{+}π^{+}π^{-} decays, based on a data sample corresponding to an integrated luminosity of 3  fb^{-1} of pp collisions recorded with the LHCb detector. A large CP asymmetry is observed in the decay amplitude involving the tensor f_{2}(1270) resonance, and in addition significant CP violation is found in the π^{+}π^{-}S wave at low invariant mass. The presence of CP violation related to interference between the π^{+}π^{-}S wave and the P wave B^{+}→ρ(770)^{0}π^{+} amplitude is also established; this causes large local asymmetries but cancels when integrated over the phase space of the decay. The results provide both qualitative and quantitative new insights into CP -violation effects in hadronic B decays.

Original languageEnglish
Article number031801
Pages (from-to)1-11
Number of pages11
JournalPhysical review letters
Volume124
Issue number3
DOIs
Publication statusPublished - 24 Jan 2020

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