Observation of several sources of CP violation in B+ → π+ π+ π− decays
Publication date
2020-01Abstract
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 f2(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)0π+ 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.
Document Type
Article
Published version
Language
English
Subject (CDU)
539 - Physical nature of matter
Keywords
Gran col·lisionador d'hadrons (França i Suïssa)
Col·lisions (Física nuclear)
Partícules (Física nuclear)
Pages
11 p.
Publisher
American Physical Society
Is part of
Physical Review Letters, 2020, Vol.124, 031801
This item appears in the following Collection(s)
Rights
© CERN
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/