Observation of several sources of CP violation in B+→π+ π+ π- decays
Name
PhysRevLett.124.031801.pdf
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707.05 KB
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Author(s)
LHCb Collaboration
Craik, D. C.
Weisser, Constantin
Williams, Michael
Alternative Title
Observation of several sources of CP violation in B[superscript +]→π[superscript +] π[superscript +] π[superscript -] decays
Date Issued
January 2020
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
LHCb Collaboration (Aaij, R., et al.), "Observation of several sources of CP violation in B+→π+ π+ π- decays." Physical Review Letters 124 (Jan. 2020): no. 031801 doi 10.1103/PhysRevLett.124.031801 ©2020 Author(s)
Version
Final published version
Abstract
Observations are reported of different sources of CP violation from an amplitude analysis of B[superscript +] → π[superscript +] π[superscript +] π[superscript -] 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[subscript 2](1270) resonance, and in addition significant CP violation is found in the π[superscript +] π[superscript -] S wave at low invariant mass. The presence of CP violation related to interference between the π[superscript +] π[superscript -] S wave and the P wave B[superscript +] → ρ(770)[superscript 0] π[superscript +] 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.124.031801
