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Search for CP violation and observation of P violation in Λ0b→pπ−π+π− [lambda b 0→ ppi- pi+ pi-] decays

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 h...

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Main Authors: Aaij, Roel (Author) , Archilli, Flavio (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Borsato, Martino (Author) , Braun, Svende (Author) , Comerma-Montells, Albert (Author) , D'Argent, Philippe (Author) , Dziewiecki, Michal (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kecke, Matthieu (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Malygina, Hanna (Author) , Marks, Jörg (Author) , Piucci, Alessio (Author) , Schmelling, Michael (Author) , Skidmore, Nicola (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Other Authors: Stemmle, Simon (Other)
Format: Article (Journal)
Language:English
Published: 8 September 2020
In: Physical review
Year: 2020, Volume: 102, Issue: 5, Pages: 1-12
ISSN:2470-0029
DOI:10.1103/PhysRevD.102.051101
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.102.051101
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.102.051101
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Author Notes:LHCb Collaboration, R. Aaij et al.*
Description
Summary: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.
Item Description:*LHCb Collaboration: R. Aaij, F. Archilli, S. Bachmann, Berninghoff, A. Comerma-Montells, M. Dziewiecki, D. Gerick, J. P. Grabowski, X. Han, S. Hansmann-Menzemer, J. Hu, M. Kecke, R. Kopecna, B. Leverington, H. Malygina, J. Marks, A. Piucci, M. Schmelling, N. Skidmore, S. Stemmle, U. Uwer, A. Zhelezov [und 871 weitere]
Bei Lambda ist b hochgestellt und 0 tiefgestellt
Gesehen am 06.04.2021
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.102.051101

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