Observation of the Doubly Charmed Baryon Ξcc + +

(LHCb Collaboration)

doi:10.1103/PhysRevLett.119.112001

Observation of the Doubly Charmed Baryon Ξcc + +

(LHCb Collaboration)

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

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

Résumé

A highly significant structure is observed in the Λc+K-π+π+ mass spectrum, where the Λc+ baryon is reconstructed in the decay mode pK-π+. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξcc++. The difference between the masses of the Ξcc++ and Λc+ states is measured to be 1334.94±0.72(stat.)±0.27(syst.) MeV/c2, and the Ξcc++ mass is then determined to be 3621.40±0.72(stat.)±0.27(syst.)±0.14(Λc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Λc+ mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb-1, and confirmed in an additional sample of data collected at 8 TeV.

langue originale	Anglais
Numéro d'article	112001
journal	Physical Review Letters
Volume	119
Numéro de publication	11
Les DOIs	https://doi.org/10.1103/PhysRevLett.119.112001
état	Publié - 11 sept. 2017

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10.1103/PhysRevLett.119.112001

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@article{e6512b4ac7014eee923e52cb8494aa99,

title = "Observation of the Doubly Charmed Baryon Ξcc + +",

abstract = "A highly significant structure is observed in the Λc+K-π+π+ mass spectrum, where the Λc+ baryon is reconstructed in the decay mode pK-π+. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξcc++. The difference between the masses of the Ξcc++ and Λc+ states is measured to be 1334.94±0.72(stat.)±0.27(syst.) MeV/c2, and the Ξcc++ mass is then determined to be 3621.40±0.72(stat.)±0.27(syst.)±0.14(Λc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Λc+ mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb-1, and confirmed in an additional sample of data collected at 8 TeV.",

author = "\{(LHCb Collaboration)\} and R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. 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 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 I. Babuschkin and S. Bachmann and Back, \{J. J.\} and A. Badalov and C. Baesso and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, \{R. J.\} and C. Barschel and S. Barsuk and W. Barter and F. Baryshnikov and V. Batozskaya and V. Battista and A. Bay and L. Beaucourt and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2017 CERN, for the LHCb Collaboration.",

year = "2017",

month = sep,

day = "11",

doi = "10.1103/PhysRevLett.119.112001",

language = "English",

volume = "119",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "11",

}

TY - JOUR

T1 - Observation of the Doubly Charmed Baryon Ξcc + +

AU - (LHCb Collaboration)

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

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 - 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 - Babuschkin, I.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Baranov, A.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Baryshnikov, F.

AU - Batozskaya, V.

AU - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2017/9/11

Y1 - 2017/9/11

N2 - A highly significant structure is observed in the Λc+K-π+π+ mass spectrum, where the Λc+ baryon is reconstructed in the decay mode pK-π+. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξcc++. The difference between the masses of the Ξcc++ and Λc+ states is measured to be 1334.94±0.72(stat.)±0.27(syst.) MeV/c2, and the Ξcc++ mass is then determined to be 3621.40±0.72(stat.)±0.27(syst.)±0.14(Λc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Λc+ mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb-1, and confirmed in an additional sample of data collected at 8 TeV.

AB - A highly significant structure is observed in the Λc+K-π+π+ mass spectrum, where the Λc+ baryon is reconstructed in the decay mode pK-π+. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξcc++. The difference between the masses of the Ξcc++ and Λc+ states is measured to be 1334.94±0.72(stat.)±0.27(syst.) MeV/c2, and the Ξcc++ mass is then determined to be 3621.40±0.72(stat.)±0.27(syst.)±0.14(Λc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Λc+ mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb-1, and confirmed in an additional sample of data collected at 8 TeV.

UR - https://www.scopus.com/pages/publications/85029899616

U2 - 10.1103/PhysRevLett.119.112001

DO - 10.1103/PhysRevLett.119.112001

M3 - Article

C2 - 28949228

AN - SCOPUS:85029899616

SN - 0031-9007

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

M1 - 112001

ER -

Observation of the Doubly Charmed Baryon Ξcc + +

Résumé

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