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Observation of a J/ψΛ Resonance Consistent with a Strange Pentaquark Candidate in B
Aaij, R; Abdelmotteleb, A S W; Abellan Beteta, C; Abudinén, F; Ackernley, T; Adeva, B; Adinolfi, M; Adlarson, P; Afsharnia, H; Agapopoulou, C; Aidala, C A; Ajaltouni, Z; Akar, S; Akiba, K; Albrecht, J; Alessio, F; Alexander, M; Alfonso Albero, A; Aliouche, Z; Alvarez Cartelle, P; Amalric, R; Amato, S; Amey, J L; Amhis, Y; An, L; Anderlini, L; Andersson, M; Andreianov, A; Andreotti, M; Andreou, D; Ao, D; Archilli, F; Artamonov, A; Artuso, M; Aslanides, E; Atzeni, M; Audurier, B; Bachmann, S; Bachmayer, M; Back, J J; Bailly-Reyre, A; Baladron Rodriguez, P; Balagura, V; Baldini, W; Baptista de Souza Leite, J; Barbetti, M; Barlow, R J; Barsuk, S; Barter, W; Bartolini, M.
Afiliación
  • Aaij R; Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.
  • Abdelmotteleb ASW; Department of Physics, University of Warwick, Coventry, United Kingdom.
  • Abellan Beteta C; Physik-Institut, Universität Zürich, Zürich, Switzerland.
  • Abudinén F; Department of Physics, University of Warwick, Coventry, United Kingdom.
  • Ackernley T; Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom.
  • Adeva B; Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
  • Adinolfi M; H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom.
  • Adlarson P; Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden (associated with School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom).
  • Afsharnia H; Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
  • Agapopoulou C; LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.
  • Aidala CA; University of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA).
  • Ajaltouni Z; Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
  • Akar S; University of Cincinnati, Cincinnati, Ohio, USA.
  • Akiba K; Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.
  • Albrecht J; Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
  • Alessio F; European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  • Alexander M; School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Alfonso Albero A; ICCUB, Universitat de Barcelona, Barcelona, Spain.
  • Aliouche Z; Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
  • Alvarez Cartelle P; Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
  • Amalric R; LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.
  • Amato S; Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
  • Amey JL; H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom.
  • Amhis Y; Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France.
  • An L; European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  • Anderlini L; European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  • Andersson M; INFN Sezione di Firenze, Firenze, Italy.
  • Andreianov A; Physik-Institut, Universität Zürich, Zürich, Switzerland.
  • Andreotti M; Affiliated with an institute covered by a cooperation agreement with CERN.
  • Andreou D; INFN Sezione di Ferrara, Ferrara, Italy.
  • Ao D; Syracuse University, Syracuse, New York, USA.
  • Archilli F; University of Chinese Academy of Sciences, Beijing, China.
  • Artamonov A; Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
  • Artuso M; Affiliated with an institute covered by a cooperation agreement with CERN.
  • Aslanides E; Syracuse University, Syracuse, New York, USA.
  • Atzeni M; Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France.
  • Audurier B; Physik-Institut, Universität Zürich, Zürich, Switzerland.
  • Bachmann S; Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France.
  • Bachmayer M; Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
  • Back JJ; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • Bailly-Reyre A; Department of Physics, University of Warwick, Coventry, United Kingdom.
  • Baladron Rodriguez P; LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.
  • Balagura V; Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
  • Baldini W; Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France.
  • Baptista de Souza Leite J; INFN Sezione di Ferrara, Ferrara, Italy.
  • Barbetti M; Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
  • Barlow RJ; INFN Sezione di Firenze, Firenze, Italy.
  • Barsuk S; Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
  • Barter W; Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France.
  • Bartolini M; Imperial College London, London, United Kingdom.
Phys Rev Lett ; 131(3): 031901, 2023 Jul 21.
Article en En | MEDLINE | ID: mdl-37540878
ABSTRACT
An amplitude analysis of B^{-}→J/ψΛp[over ¯] decays is performed using 4400 signal candidates selected on a data sample of pp collisions recorded at center-of-mass energies of 7, 8, and 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 9 fb^{-1}. A narrow resonance in the J/ψΛ system, consistent with a pentaquark candidate with strangeness, is observed with high significance. The mass and the width of this new state are measured to be 4338.2±0.7±0.4 MeV and 7.0±1.2±1.3 MeV, where the first uncertainty is statistical and the second systematic. The spin is determined to be 1/2 and negative parity is preferred. Because of the small Q-value of the reaction, the most precise single measurement of the B^{-} mass to date, 5279.44±0.05±0.07 MeV, is obtained.
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Países Bajos
Texto completo
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XML
PubMed Links
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Países Bajos