Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays

LHCb Collaboration

doi:10.1103/PhysRevLett.117.082003

Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays

LHCb Collaboration

European Organization for Nuclear Research
University of Zurich
University Santiago de Compostela
University of Bristol
Clermont-Auvergne University
Aix Marseille Université
University of Dortmund
University of Glasgow
Science Park 105
Petersburg Nuclear Physics Institute (PNPI)
Imperial College London
University of Cincinnati
Instituto de Biofisica da UFRJ
INFN
Laboratoire de l'Accélérateur Linéaire
ENAC-IIC-GEL
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Sezione INFN di Ferrara
Universidade Federal Do Triângulo Mineiro (UFTM)
University of Maryland, College Park
University of Manchester
Max-Planck-Institut für Kernphysik
Centro Brasileiro de Pesquisas Fisicas
University of Heidelberg
Kurchatov Institute
Syracuse University
Sezione di Roma
University of Rome
University of Warwick
University of Barcelona
Pontifícia Universidade Católica do Rio de Janeiro
National Centre for Nuclear Research (NCBJ)
Université Savoie Mont Blanc
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Hanoi University of Science
INFN Sezione di Milano-Bicocca
Università degli Studi della Basilicata
Institute for Theoretical and Experimental Physics
Universités Paris VI and VII
LNF-INFN
Moscow State University
University of Birmingham
University of Urbino Carlo Bo
Massachusetts Institute of Technology
Novosibirsk State University
Sezione INFN di Cagliari
Yandex School of Data Analysis
RWTH Aachen University
University of Liverpool
University of Ferrara
INFN Sezione di Bologna
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Università degli studi di Bari Aldo Moro
Sezione di Genova
University of Milano
University of Edinburgh
University of Rome “Tor Vergata”
University of Oxford
Institute for Nuclear Physics
University of Cambridge
Scuola Normale Superiore di Pisa
Horia Hulubei National Institute of Physics and Nuclear Engineering
University of Milano-Bicocca
Sezione INFN di Milano
Kharkov Institute of Physics and Technology
CCLRC Rutherford Appleton Laboratory
Institute for Nuclear Research of the Russian Academy of Sciences
Agh University of Science and Technology Faculty of Computer Science
University of Padova
Tsinghua University
Universität Rostock
Vrije Universiteit Amsterdam
Institute of Nuclear Research, National Academy of Sciences in Ukraine
Universitá di Cagliari
Kurchatov Institute
University of Chinese Academy of Sciences
University of Valencia
University College Dublin
Universidad Nacional de Colombia
University of Genoa
ICS/University of Groningen
INFN Sezione di Bari
Ip Paris
University of Bologna
University of Modena and Reggio Emilia
University of Pisa
Central China Normal University
Universitat Ramon LLull - CSIC

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

A full amplitude analysis of Λb0→J/ψpπ- decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb-1. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N→pπ-, either the Pc(4380)+ and Pc(4450)+→J/ψp states, previously observed in Λb0→J/ψpK- decays, or the Zc(4200)-→J/ψπ- state, previously reported in B0→J/ψK+π- decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the Pc(4380)+ and Pc(4450)+ production rates expected from their previous observation taking account of Cabibbo suppression.

langue originale	Anglais
Numéro d'article	082003
journal	Physical Review Letters
Volume	117
Numéro de publication	8
Les DOIs	https://doi.org/10.1103/PhysRevLett.117.082003
état	Publié - 18 août 2016
Modification externe	Oui

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10.1103/PhysRevLett.117.082003

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@article{307d16b373f0421f82da735a757f99d1,

title = "Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays",

abstract = "A full amplitude analysis of Λb0→J/ψpπ- decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb-1. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N→pπ-, either the Pc(4380)+ and Pc(4450)+→J/ψp states, previously observed in Λb0→J/ψpK- decays, or the Zc(4200)-→J/ψπ- state, previously reported in B0→J/ψK+π- decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the Pc(4380)+ and Pc(4450)+ production rates expected from their previous observation taking account of Cabibbo suppression.",

author = "\{LHCb Collaboration\} and R. Aaij and \{Abell{\'a}n Beteta\}, C. and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and \{Alvarez Cartelle\}, P. and Alves, \{A. A.\} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, \{J. E.\} and Appleby, \{R. B.\} and \{Aquines Gutierrez\}, O. and F. Archilli and P. D'Argent and \{Arnau Romeu\}, J. and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and Back, \{J. J.\} and A. Badalov and C. Baesso and W. Baldini and Barlow, \{R. J.\} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and V. Battista and A. Bay and L. Beaucourt and J. Beddow and F. Bedeschi and I. Bediaga and Bel, \{L. J.\} and V. Bellee and F. Fleuret",

note = "Publisher Copyright: {\textcopyright} 2016 CERN.",

year = "2016",

month = aug,

day = "18",

doi = "10.1103/PhysRevLett.117.082003",

language = "English",

volume = "117",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "8",

}

TY - JOUR

T1 - Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - D'Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Batozskaya, V.

AU - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Bel, L. J.

AU - Bellee, V.

AU - Fleuret, F.

PY - 2016/8/18

Y1 - 2016/8/18

N2 - A full amplitude analysis of Λb0→J/ψpπ- decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb-1. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N→pπ-, either the Pc(4380)+ and Pc(4450)+→J/ψp states, previously observed in Λb0→J/ψpK- decays, or the Zc(4200)-→J/ψπ- state, previously reported in B0→J/ψK+π- decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the Pc(4380)+ and Pc(4450)+ production rates expected from their previous observation taking account of Cabibbo suppression.

AB - A full amplitude analysis of Λb0→J/ψpπ- decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb-1. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N→pπ-, either the Pc(4380)+ and Pc(4450)+→J/ψp states, previously observed in Λb0→J/ψpK- decays, or the Zc(4200)-→J/ψπ- state, previously reported in B0→J/ψK+π- decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the Pc(4380)+ and Pc(4450)+ production rates expected from their previous observation taking account of Cabibbo suppression.

U2 - 10.1103/PhysRevLett.117.082003

DO - 10.1103/PhysRevLett.117.082003

M3 - Article

AN - SCOPUS:84985034404

SN - 0031-9007

VL - 117

JO - Physical Review Letters

JF - Physical Review Letters

IS - 8

M1 - 082003

ER -

Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays

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