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Model-Independent Evidence for J/ψp Contributions to Λb0J/ψpK Decays

R. Aaij39, C. Abellán Beteta41, B. Adeva38, M. Adinolfi47, Z. Ajaltouni5, S. Akar6, J. Albrecht10, F. Alessio39, M. Alexander52 et al. (LHCb Collaboration)

M. Alexander52, S. Ali42, G. Alkhazov31, P. Alvarez Cartelle54, A. A. Alves, Jr.58, S. Amato2, S. Amerio23, Y. Amhis7, L. An3,40, L. Anderlini18, G. Andreassi40, M. Andreotti17,g, J. E. Andrews59, R. B. Appleby55, O. Aquines Gutierrez11, F. Archilli39, P. d’Argent12, A. Artamonov36, M. Artuso60, E. Aslanides6, G. Auriemma26,n, M. Baalouch5, S. Bachmann12, J. J. Back49, A. Badalov37, C. Baesso61, S. Baker54, W. Baldini17, R. J. Barlow55, C. Barschel39, S. Barsuk7, W. Barter39, V. Batozskaya29, V. Battista40, A. Bay40, L. Beaucourt4, J. Beddow52, F. Bedeschi24, I. Bediaga1, L. J. Bel42, V. Bellee40, N. Belloli21,k, I. Belyaev32, E. Ben-Haim8, G. Bencivenni19, S. Benson39, J. Benton47, A. Berezhnoy33, R. Bernet41, A. Bertolin23, F. Betti15, M.-O. Bettler39, M. van Beuzekom42, S. Bifani46, P. Billoir8, T. Bird55, A. Birnkraut10, A. Bizzeti18,i, T. Blake49, F. Blanc40, J. Blouw11, S. Blusk60, V. Bocci26, A. Bondar35, N. Bondar31,39, W. Bonivento16, A. Borgheresi21,k, S. Borghi55, M. Borisyak67, M. Borsato38, M. Boubdir9, T. J. V. Bowcock53, E. Bowen41, C. Bozzi17,39, S. Braun12, M. Britsch12, T. Britton60, J. Brodzicka55, E. Buchanan47, C. Burr55, A. Bursche2, J. Buytaert39, S. Cadeddu16, R. Calabrese17,g, M. Calvi21,k, M. Calvo Gomez37,p, P. Campana19, D. Campora Perez39, L. Capriotti55, A. Carbone15,e, G. Carboni25,l, R. Cardinale20,j, A. Cardini16, P. Carniti21,k, L. Carson51, K. Carvalho Akiba2, G. Casse53, L. Cassina21,k, L. Castillo Garcia40, M. Cattaneo39, Ch. Cauet10, G. Cavallero20, R. Cenci24,t, M. Charles8, Ph. Charpentier39, G. Chatzikonstantinidis46, M. Chefdeville4, S. Chen55, S.-F. Cheung56, V. Chobanova38, M. Chrzaszcz41,27, X. Cid Vidal39, G. Ciezarek42, P. E. L. Clarke51, M. Clemencic39, H. V. Cliff48, J. Closier39, V. Coco58, J. Cogan6, E. Cogneras5, V. Cogoni16,f, L. Cojocariu30, G. Collazuol23,r, P. Collins39, A. Comerma-Montells12, A. Contu39, A. Cook47, S. Coquereau8, G. Corti39, M. Corvo17,g, B. Couturier39, G. A. Cowan51, D. C. Craik51, A. Crocombe49, M. Cruz Torres61, S. Cunliffe54, R. Currie54, C. D’Ambrosio39, E. Dall’Occo42, J. Dalseno47, P. N. Y. David42, A. Davis58, O. De Aguiar Francisco2, K. De Bruyn6, S. De Capua55, M. De Cian12, J. M. De Miranda1, L. De Paula2, P. De Simone19, C.-T. Dean52, D. Decamp4, M. Deckenhoff10, L. Del Buono8, N. Déléage4, M. Demmer10, A. Dendek28, D. Derkach67, O. Deschamps5, F. Dettori39, B. Dey22, A. Di Canto39, H. Dijkstra39, F. Dordei39, M. Dorigo40, A. Dosil Suárez38, A. Dovbnya44, K. Dreimanis53, L. Dufour42, G. Dujany55, K. Dungs39, P. Durante39, R. Dzhelyadin36, A. Dziurda39, A. Dzyuba31, S. Easo50,39, U. Egede54, V. Egorychev32, S. Eidelman35, S. Eisenhardt51, U. Eitschberger10, R. Ekelhof10, L. Eklund52, I. El Rifai5, Ch. Elsasser41, S. Ely60, S. Esen12, H. M. Evans48, T. Evans56, A. Falabella15, C. Färber39, N. Farley46, S. Farry53, R. Fay53, D. Fazzini21,k, D. Ferguson51, V. Fernandez Albor38, F. Ferrari15,39, F. Ferreira Rodrigues1, M. Ferro-Luzzi39, S. 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Skidmore47, T. Skwarnicki60, E. Smith54, I. T. Smith51, J. Smith48, M. Smith55, H. Snoek42, M. D. Sokoloff58, F. J. P. Soler52, F. Soomro40, D. Souza47, B. Souza De Paula2, B. Spaan10, P. Spradlin52, S. Sridharan39, F. Stagni39, M. Stahl12, S. Stahl39, S. Stefkova54, O. Steinkamp41, O. Stenyakin36, S. Stevenson56, S. Stoica30, S. Stone60, B. Storaci41, S. Stracka24,t, M. Straticiuc30, U. Straumann41, L. Sun58, W. Sutcliffe54, K. Swientek28, S. Swientek10, V. Syropoulos43, M. Szczekowski29, T. Szumlak28, S. T’Jampens4, A. Tayduganov6, T. Tekampe10, G. Tellarini17,g, F. Teubert39, C. Thomas56, E. Thomas39, J. van Tilburg42, V. Tisserand4, M. Tobin40, S. Tolk43, L. Tomassetti17,g, D. Tonelli39, S. Topp-Joergensen56, E. Tournefier4, S. Tourneur40, K. Trabelsi40, M. Traill52, M. T. Tran40, M. Tresch41, A. Trisovic39, A. Tsaregorodtsev6, P. Tsopelas42, N. Tuning42,39, A. Ukleja29, A. Ustyuzhanin67,66, U. Uwer12, C. Vacca16,39,f, V. Vagnoni15,39, S. Valat39, G. Valenti15, A. Vallier7, R. 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  • 1Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
  • 2Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
  • 3Center for High Energy Physics, Tsinghua University, Beijing, China
  • 4LAPP, Université Savoie Mont-Blanc, CNRS/IN2P3, Annecy-Le-Vieux, France
  • 5Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France
  • 6CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
  • 7LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
  • 8LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
  • 9I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany
  • 10Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
  • 11Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
  • 12Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
  • 13School of Physics, University College Dublin, Dublin, Ireland
  • 14Sezione INFN di Bari, Bari, Italy
  • 15Sezione INFN di Bologna, Bologna, Italy
  • 16Sezione INFN di Cagliari, Cagliari, Italy
  • 17Sezione INFN di Ferrara, Ferrara, Italy
  • 18Sezione INFN di Firenze, Firenze, Italy
  • 19Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
  • 20Sezione INFN di Genova, Genova, Italy
  • 21Sezione INFN di Milano Bicocca, Milano, Italy
  • 22Sezione INFN di Milano, Milano, Italy
  • 23Sezione INFN di Padova, Padova, Italy
  • 24Sezione INFN di Pisa, Pisa, Italy
  • 25Sezione INFN di Roma Tor Vergata, Roma, Italy
  • 26Sezione INFN di Roma La Sapienza, Roma, Italy
  • 27Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
  • 28AGH, University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland
  • 29National Center for Nuclear Research (NCBJ), Warsaw, Poland
  • 30Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
  • 31Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
  • 32Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
  • 33Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
  • 34Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia
  • 35Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia
  • 36Institute for High Energy Physics (IHEP), Protvino, Russia
  • 37Universitat de Barcelona, Barcelona, Spain
  • 38Universidad de Santiago de Compostela, Santiago de Compostela, Spain
  • 39European Organization for Nuclear Research (CERN), Geneva, Switzerland
  • 40Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
  • 41Physik-Institut, Universität Zürich, Zürich, Switzerland
  • 42Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands
  • 43Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands
  • 44NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
  • 45Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
  • 46University of Birmingham, Birmingham, United Kingdom
  • 47H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
  • 48Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
  • 49Department of Physics, University of Warwick, Coventry, United Kingdom
  • 50STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
  • 51School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
  • 52School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
  • 53Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
  • 54Imperial College London, London, United Kingdom
  • 55School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
  • 56Department of Physics, University of Oxford, Oxford, United Kingdom
  • 57Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
  • 58University of Cincinnati, Cincinnati, Ohio, USA
  • 59University of Maryland, College Park, Maryland, USA
  • 60Syracuse University, Syracuse, New York, USA
  • 61Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil [associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil]
  • 62University of Chinese Academy of Sciences, Beijing, China [associated with Center for High Energy Physics, Tsinghua University, Beijing, China]
  • 63Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China [associated with Center for High Energy Physics, Tsinghua University, Beijing, China]
  • 64Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia [associated with LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France]
  • 65Institut für Physik, Universität Rostock, Rostock, Germany [associated with Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany]
  • 66National Research Centre Kurchatov Institute, Moscow, Russia [associated with Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia]
  • 67Yandex School of Data Analysis, Moscow, Russia [associated with Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia]
  • 68Instituto de Fisica Corpuscular (IFIC), Universitat de Valencia-CSIC, Valencia, Spain [associated with Universitat de Barcelona, Barcelona, Spain]
  • 69Van Swinderen Institute, University of Groningen, Groningen, Netherlands [associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands]

  • *Full author list given at the end of the article.
  • Deceased.
  • aUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba-MG, Brazil.
  • bLaboratoire Leprince-Ringuet, Palaiseau, France.
  • cP.N. Lebedev Physical Institute, Russian Academy of Science (LPI RAS), Moscow, Russia.
  • dUniversità di Bari, Bari, Italy.
  • eUniversità di Bologna, Bologna, Italy.
  • fUniversità di Cagliari, Cagliari, Italy.
  • gUniversità di Ferrara, Ferrara, Italy.
  • hUniversità di Urbino, Urbino, Italy.
  • iUniversità di Modena e Reggio Emilia, Modena, Italy.
  • jUniversità di Genova, Genova, Italy.
  • kUniversità di Milano Bicocca, Milano, Italy.
  • lUniversità di Roma Tor Vergata, Roma, Italy.
  • mUniversità di Roma La Sapienza, Roma, Italy.
  • nUniversità della Basilicata, Potenza, Italy.
  • oAGH, University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland.
  • pLIFAELS, La Salle, Universitat Ramon Llull, Barcelona, Spain.
  • qHanoi University of Science, Hanoi, Vietnam.
  • rUniversità di Padova, Padova, Italy.
  • sUniversità di Pisa, Pisa, Italy.
  • tScuola Normale Superiore, Pisa, Italy.
  • uUniversità degli Studi di Milano, Milano, Italy.

Phys. Rev. Lett. 117, 082002 – Published 18 August, 2016

DOI: https://doi.org/10.1103/PhysRevLett.117.082002

Abstract

The data sample of Λb0J/ψpK decays acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3fb1, is inspected for the presence of J/ψp or J/ψK contributions with minimal assumptions about Kp contributions. It is demonstrated at more than nine standard deviations that Λb0J/ψpK decays cannot be described with Kp contributions alone, and that J/ψp contributions play a dominant role in this incompatibility. These model-independent results support the previously obtained model-dependent evidence for Pc+J/ψp charmonium-pentaquark states in the same data sample.

Physics Subject Headings (PhySH)

Synopsis

Pentaquark Discovery Confirmed

Published 18 August, 2016

New results from the LHCb experiment confirm the 2015 discovery that quarks can combine into groups of five.

See more in Physics

See Also

Evidence for Exotic Hadron Contributions to Λb0J/ψpπ Decays

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 117, 082003 (2016)

Article Text

Supplemental Material

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