Search for CP violation and observation of P violation in Λb0 →pπ-π+π- decays

LHCb Collaboration

doi:10.1103/PhysRevD.102.051101

Search for CP violation and observation of P violation in Λb0 →pπ-π+π- decays

LHCb Collaboration

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University of Zurich
University of Liverpool
Universidade de Santiago de Compostela
University of Bristol
Clermont-Auvergne University
Syracuse University
University of Michigan, Ann Arbor
Sezione INFN di Milano
University of Cincinnati
LNF-INFN
University of Dortmund
European Organization for Nuclear Research
University of Glasgow
University of Barcelona
Petersburg Nuclear Physics Institute (PNPI)
Imperial College London
Instituto de Biofisica da UFRJ
Université Paris-Saclay
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
ENAC-IIC-GEL
Sezione INFN di Ferrara
University of Heidelberg
Aix-Marseille Université
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Yandex School of Data Analysis
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University of Warwick
University of Manchester
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National University of Science and Technology “MISIS”
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
National Centre for Nuclear Research (NCBJ)
Centro Brasileiro de Pesquisas Fisicas
University of Chinese Academy of Sciences
Sorbonne Université
RWTH Aachen University
Moscow State University
INFN
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University of Bologna
University of Cambridge
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University of Birmingham
University of Modena and Reggio Emilia
University of Oxford
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Massachusetts Institute of Technology
National Research University
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Novosibirsk State University
Tsinghua University
Wuhan University
University of Ferrara
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Universitat Ramon LLull - CSIC
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University of Pisa
LTHE (UMR 5564 CNRS/IRD/Université de Grenoble)
University of Edinburgh
Horia Hulubei National Institute of Physics and Nuclear Engineering
Universidad Nacional Autónoma de Honduras
MST-8, Los Alamos National Laboratory
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University of Rome “Tor Vergata”
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Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

A search for CP violation in the Λb0→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.

langue originale	Anglais
Numéro d'article	051101
journal	Physical Review D
Volume	102
Numéro de publication	5
Les DOIs	https://doi.org/10.1103/PhysRevD.102.051101
état	Publié - 8 sept. 2020

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10.1103/PhysRevD.102.051101

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@article{10ea15a338b74df6b546e3d50f11dbd9,

title = "Search for CP violation and observation of P violation in Λb0 →pπ-π+π- decays",

abstract = "A search for CP violation in the Λb0→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.",

author = "\{LHCb Collaboration\} and R. Aaij and Beteta, \{C. Abell{\'a}n\} and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and Aidala, \{C. A.\} and S. Aiola and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and Albero, \{A. Alfonso\} and G. Alkhazov and Cartelle, \{P. Alvarez\} and Alves, \{A. A.\} and S. Amato and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and F. Archilli and Romeu, \{J. Arnau\} and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, \{J. J.\} and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, \{R. J.\} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and G. Bassi and V. Batozskaya and B. Batsukh and A. Battig and V. Battista and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2020 CERN.",

year = "2020",

month = sep,

day = "8",

doi = "10.1103/PhysRevD.102.051101",

language = "English",

volume = "102",

journal = "Physical Review D",

issn = "2470-0010",

number = "5",

}

TY - JOUR

T1 - Search for CP violation and observation of P violation in Λb0 →pπ-π+π- decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Beteta, C. Abellán

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Albero, A. Alfonso

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Archilli, F.

AU - Romeu, J. Arnau

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Baranov, A.

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Bassi, G.

AU - Batozskaya, V.

AU - Batsukh, B.

AU - Battig, A.

AU - Battista, V.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2020/9/8

Y1 - 2020/9/8

N2 - A search for CP violation in the Λb0→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.

AB - A search for CP violation in the Λb0→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.

U2 - 10.1103/PhysRevD.102.051101

DO - 10.1103/PhysRevD.102.051101

M3 - Article

AN - SCOPUS:85092700861

SN - 2470-0010

VL - 102

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 051101

ER -

Search for CP violation and observation of P violation in Λb0 →pπ-π+π- decays

Résumé

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