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Title: | Search for CP violation and observation of P violation in Lambda(0)(b) -> p pi(-) pi(+) pi(-) decays |
Author: | Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, Pere Golobardes, Elisabet Graciani Díaz, Ricardo Graugés Pous, Eugeni Manera Escalero, R. Vilasis-Cardona, Xavier LHCb Collaboration |
Keywords: | Gran Col·lisionador d'Hadrons Mesons (Física nuclear) Barions Large Hadron Collider (France and Switzerland) Mesons (Nuclear physics) Baryons |
Issue Date: | 8-Sep-2020 |
Publisher: | American Physical Society |
Abstract: | A search for CP violation in the Λ0b→pπ−π+π− decay is performed using LHCb data corresponding to an integrated luminosity of 6.6 fb−1 collected in pp collisions at center-of-mass energies of 7, 8 and 13 TeV. The analysis uses both triple product asymmetries and the unbinned energy test method. The highest significances of CP asymmetry are 2.9 standard deviations from triple product asymmetries and 3.0 standard deviations for the energy test method. Once the global p-value is considered, all results are consistent with no CP violation. Parity violation is observed at a significance of 5.5 standard deviations for the triple product asymmetry method and 5.3 standard deviations for the energy test method. The reported deviations are given in regions of phase space. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.102.051101 |
It is part of: | Physical Review D, 2020, vol. 102, num. 5, p. 051101 |
URI: | http://hdl.handle.net/2445/174870 |
Related resource: | https://doi.org/10.1103/PhysRevD.102.051101 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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