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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)
Large Hadron Collider (France and Switzerland)
Mesons (Nuclear physics)
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:
It is part of: Physical Review D, 2020, vol. 102, num. 5, p. 051101
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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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