Observation of Several Sources of <i>CP</i> Violation in <i>B</i><SUP>+</SUP> → π<SUP>+</SUP>π<SUP>+</SUP>π<SUP>-</SUP> Decays



Aaij, R, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M
et al (show 826 more authors) (2020) Observation of Several Sources of <i>CP</i> Violation in <i>B</i><SUP>+</SUP> → π<SUP>+</SUP>π<SUP>+</SUP>π<SUP>-</SUP> Decays. PHYSICAL REVIEW LETTERS, 124 (3). 031801-.

Access the full-text of this item by clicking on the Open Access link.

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.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-018.html
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 05 May 2020 15:49
Last Modified: 11 Oct 2023 16:57
DOI: 10.1103/PhysRevLett.124.031801
Open Access URL: https://journals.aps.org/prl/pdf/10.1103/PhysRevLe...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3086100