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Observation of a Narrow Pentaquark State, P_{c}(4312)
Aaij, R; Abellán Beteta, C; Adeva, B; Adinolfi, M; Aidala, C A; Ajaltouni, Z; Akar, S; Albicocco, P; Albrecht, J; Alessio, F; Alexander, M; Alfonso Albero, A; Alkhazov, G; Alvarez Cartelle, P; Alves, A A; Amato, S; Amhis, Y; An, L; Anderlini, L; Andreassi, G; Andreotti, M; Andrews, J E; Archilli, F; d'Argent, P; Arnau Romeu, J; Artamonov, A; Artuso, M; Arzymatov, K; Aslanides, E; Atzeni, M; Audurier, B; Bachmann, S; Back, J J; Baker, S; Balagura, V; Baldini, W; Baranov, A; Barlow, R J; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Batozskaya, V; Batsukh, B; Battig, A; Battista, V; Bay, A; Bedeschi, F; Bediaga, I; Beiter, A.
Afiliação
  • Aaij R; Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.
  • Abellán Beteta C; Physik-Institut, Universität Zürich, Zürich, Switzerland.
  • 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.
  • Aidala CA; University of Michigan, Ann Arbor, 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.
  • Albicocco P; INFN Laboratori Nazionali di Frascati, Frascati, Italy.
  • 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.
  • Alkhazov G; Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, Russia, St.Petersburg, Russia.
  • Alvarez Cartelle P; Imperial College London, London, United Kingdom.
  • Alves AA; Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
  • Amato S; Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
  • Amhis Y; LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France.
  • An L; INFN Sezione di Firenze, Firenze, Italy.
  • Anderlini L; INFN Sezione di Firenze, Firenze, Italy.
  • Andreassi G; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • Andreotti M; INFN Sezione di Ferrara, Ferrara, Italy.
  • Andrews JE; University of Maryland, College Park, Maryland, USA.
  • Archilli F; INFN Laboratori Nazionali di Frascati, Frascati, Italy.
  • d'Argent P; Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
  • Arnau Romeu J; Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France.
  • Artamonov A; Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia, Protvino, Russia.
  • Artuso M; Syracuse University, Syracuse, New York, USA.
  • Arzymatov K; Yandex School of Data Analysis, Moscow, Russia.
  • Aslanides E; Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France.
  • Atzeni M; Physik-Institut, Universität Zürich, Zürich, Switzerland.
  • Audurier B; INFN Sezione di Cagliari, Monserrato, Italy.
  • Bachmann S; Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
  • Back JJ; Department of Physics, University of Warwick, Coventry, United Kingdom.
  • Baker S; Imperial College London, London, United Kingdom.
  • Balagura V; LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France.
  • Baldini W; INFN Sezione di Ferrara, Ferrara, Italy.
  • Baranov A; European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  • Barlow RJ; Yandex School of Data Analysis, Moscow, Russia.
  • Barsuk S; School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
  • Barter W; LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France.
  • Bartolini M; Imperial College London, London, United Kingdom.
  • Baryshnikov F; INFN Sezione di Genova, Genova, Italy.
  • Batozskaya V; National University of Science and Technology "MISIS", Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia, Moscow, Russia].
  • Batsukh B; National Center for Nuclear Research (NCBJ), Warsaw, Poland.
  • Battig A; Syracuse University, Syracuse, New York, USA.
  • Battista V; Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
  • Bay A; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • Bedeschi F; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • Bediaga I; INFN Sezione di Pisa, Pisa, Italy.
  • Beiter A; Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
Phys Rev Lett ; 122(22): 222001, 2019 Jun 07.
Article em En | MEDLINE | ID: mdl-31283265
ABSTRACT
A narrow pentaquark state, P_{c}(4312)^{+}, decaying to J/ψp, is discovered with a statistical significance of 7.3σ in a data sample of Λ_{b}^{0}→J/ψpK^{-} decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. The P_{c}(4450)^{+} pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, P_{c}(4440)^{+} and P_{c}(4457)^{+}, where the statistical significance of this two-peak interpretation is 5.4σ. The proximity of the Σ_{c}^{+}D[over ¯]^{0} and Σ_{c}^{+}D[over ¯]^{*0} thresholds to the observed narrow peaks suggests that they play an important role in the dynamics of these states.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article