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Title: | Observation of Several Sources of CP Violation in B+ -> pi(+)pi(+)pi(-) Decays |
Author: | Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, Pere Graciani Díaz, Ricardo Graugés Pous, Eugeni Vilasis-Cardona, Xavier LHCb Collaboration |
Keywords: | Violació CP (Física nuclear) Barions CP violation (Nuclear physics) Baryons |
Issue Date: | 21-Jan-2020 |
Publisher: | American Physical Society |
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 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.124.031801 |
It is part of: | Physical Review Letters, 2020, vol. 124, num. 3, p. 031801 |
URI: | https://hdl.handle.net/2445/174978 |
Related resource: | https://doi.org/10.1103/PhysRevLett.124.031801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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