Observation of a Resonant Structure near the Ds+ Ds- Threshold in the B+ → Ds+ Ds- K+ Decay

(LHCb Collaboration)

doi:10.1103/PhysRevLett.131.071901

Observation of a Resonant Structure near the Ds+ Ds- Threshold in the B+ → Ds+ Ds- K+ Decay

(LHCb Collaboration)

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University of Warwick
Physik-Institut der Universität Zürich
University of Liverpool
Universidade de Santiago de Compostela
University of Bristol
Clermont-Auvergne University
Sorbonne Université
University of Michigan, Ann Arbor
Sezione INFN di Milano
University of Cincinnati
University of Dortmund
European Organization for Nuclear Research
University of Glasgow
University of Barcelona
University of Manchester
University of Cambridge
Instituto de Biofisica da UFRJ
Université Paris-Saclay
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Sezione INFN di Ferrara
Syracuse University
University of Chinese Academy of Sciences
University of Heidelberg
Aix-Marseille Université
Ip Paris
ENAC-IIC-GEL
Centro Brasileiro de Pesquisas Fisicas
University of Florence
Imperial College London
RWTH Aachen University
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Scuola Normale Superiore di Pisa
Institute of High Energy Physics, Chinese Academy of Sciences
LNF-INFN
Universitat Ramon LLull - CSIC
University of Padova
Institute for Nuclear Physics
Wuhan University
University of Birmingham
Maastricht University
University of Ferrara
University of Maryland, College Park
Sezione INFN di Cagliari
South China Normal University
INFN Sezione di Milano-Bicocca
University of Milano-Bicocca
INFN Sezione di Bologna
University of Bologna
INFN Roma Tor Vergata
Sezione di Genova
University of Genoa
University of Oxford
Laboratoire de Physique des Particules
Tsinghua University
Institute of Nuclear Research, National Academy of Sciences in Ukraine
University of Edinburgh
Horia Hulubei National Institute of Physics and Nuclear Engineering
INFN Sezione di Bari
Massachusetts Institute of Technology
MST-8, Los Alamos National Laboratory
Universidad Nacional Autónoma de Honduras
Hunan University
State Key Laboratory of Nuclear Physics and Technology
ICS/University of Groningen
Università degli studi di Bari Aldo Moro
Universitá di Cagliari
Eötvös Loránd University
University College Dublin
INFN Sezione di Perugia
CCLRC Rutherford Appleton Laboratory
Monash University
University of Urbino Carlo Bo
Uppsala University
Agh University of Science and Technology Faculty of Computer Science
National Centre for Nuclear Research (NCBJ)
University of Rome “Tor Vergata”
Pontifícia Universidade Católica do Rio de Janeiro
Universidade de Brasília
Central China Normal University
University of Valencia
Kharkov Institute of Physics and Technology
Vrije Universiteit Amsterdam
University of Siena
Lanzhou University
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University of Milano
Iligan Institute of Technology (IIT)
University of Perugia
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University Bonn
Technische Universität München
Universidad Nacional de Colombia
University of Pisa
Università degli Studi della Basilicata
Max-Planck-Institut für Kernphysik
Universidad de Alcalá

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

Résumé

An amplitude analysis of the B+→Ds+Ds-K+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the Ds+Ds- invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width, and the quantum numbers of the structure are measured to be 3956±5±10 MeV, 43±13±8 MeV, and JPC=0++, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of cc¯ss¯ quarks. Evidence for an additional structure is found around 4140 MeV in the Ds+Ds- invariant mass, which might be caused either by a new resonance with the 0++ assignment or by a J/ψφ↔Ds+Ds- coupled-channel effect.

langue originale	Anglais
Numéro d'article	071901
journal	Physical Review Letters
Volume	131
Numéro de publication	7
Les DOIs	https://doi.org/10.1103/PhysRevLett.131.071901
état	Publié - 18 août 2023

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10.1103/PhysRevLett.131.071901

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@article{dcedc1c11c4a432a819d9e8f261fd7e3,

title = "Observation of a Resonant Structure near the Ds+ Ds- Threshold in the B+ → Ds+ Ds- K+ Decay",

abstract = "An amplitude analysis of the B+→Ds+Ds-K+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the Ds+Ds- invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width, and the quantum numbers of the structure are measured to be 3956±5±10 MeV, 43±13±8 MeV, and JPC=0++, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of cc¯ss¯ quarks. Evidence for an additional structure is found around 4140 MeV in the Ds+Ds- invariant mass, which might be caused either by a new resonance with the 0++ assignment or by a J/ψφ↔Ds+Ds- coupled-channel effect.",

author = "\{(LHCb Collaboration)\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudin{\'e}n and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and C. Agapopoulou and Aidala, \{C. A.\} and S. Aiola and Z. Ajaltouni and S. Akar and K. Akiba and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. and Z. Aliouche and \{Alvarez Cartelle\}, P. and R. Amalric and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and M. Andersson and A. Andreianov and M. Andreotti and D. Andreou and D. Ao and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and M. Bachmayer and Back, \{J. J.\} and A. Bailly-Reyre and \{Baladron Rodriguez\}, P. and V. Balagura and W. Baldini and \{Baptista De Souza Leite\}, J. and M. Barbetti and Barlow, \{R. J.\} and S. Barsuk and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2023 CERN. ",

year = "2023",

month = aug,

day = "18",

doi = "10.1103/PhysRevLett.131.071901",

language = "English",

volume = "131",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "7",

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T1 - Observation of a Resonant Structure near the Ds+ Ds- Threshold in the B+ → Ds+ Ds- K+ Decay

AU - (LHCb Collaboration)

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Aliouche, Z.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreianov, A.

AU - Andreotti, M.

AU - Andreou, D.

AU - Ao, D.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Bailly-Reyre, A.

AU - Baladron Rodriguez, P.

AU - Balagura, V.

AU - Baldini, W.

AU - Baptista De Souza Leite, J.

AU - Barbetti, M.

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2023/8/18

Y1 - 2023/8/18

N2 - An amplitude analysis of the B+→Ds+Ds-K+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the Ds+Ds- invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width, and the quantum numbers of the structure are measured to be 3956±5±10 MeV, 43±13±8 MeV, and JPC=0++, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of cc¯ss¯ quarks. Evidence for an additional structure is found around 4140 MeV in the Ds+Ds- invariant mass, which might be caused either by a new resonance with the 0++ assignment or by a J/ψφ↔Ds+Ds- coupled-channel effect.

AB - An amplitude analysis of the B+→Ds+Ds-K+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the Ds+Ds- invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width, and the quantum numbers of the structure are measured to be 3956±5±10 MeV, 43±13±8 MeV, and JPC=0++, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of cc¯ss¯ quarks. Evidence for an additional structure is found around 4140 MeV in the Ds+Ds- invariant mass, which might be caused either by a new resonance with the 0++ assignment or by a J/ψφ↔Ds+Ds- coupled-channel effect.

UR - https://www.scopus.com/pages/publications/85168818186

U2 - 10.1103/PhysRevLett.131.071901

DO - 10.1103/PhysRevLett.131.071901

M3 - Article

AN - SCOPUS:85168818186

SN - 0031-9007

VL - 131

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

M1 - 071901

ER -

Observation of a Resonant Structure near the Ds+ Ds- Threshold in the B+ → Ds+ Ds- K+ Decay

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