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Prompt Λ +c production in pPb collisions at \( \sqrt{s_{\mathrm{NN}}}=5.02 \) TeV
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  • Regular Article - Experimental Physics
  • Open Access
  • Published: 15 February 2019

Prompt Λ +c production in pPb collisions at \( \sqrt{s_{\mathrm{NN}}}=5.02 \) TeV

  • The LHCb collaboration,
  • R. Aaij27,
  • B. Adeva41,
  • M. Adinolfi48,
  • C. A. Aidala74,
  • Z. Ajaltouni5,
  • S. Akar59,
  • P. Albicocco18,
  • J. Albrecht10,
  • F. Alessio42,
  • M. Alexander53,
  • A. Alfonso Albero40,
  • S. Ali27,
  • G. Alkhazov33,
  • P. Alvarez Cartelle55,
  • A. A. Alves Jr41,
  • S. Amato2,
  • S. Amerio23,
  • Y. Amhis7,
  • L. An3,
  • L. Anderlini17,
  • G. Andreassi43,
  • M. Andreotti16,82,
  • J. E. Andrews60,
  • R. B. Appleby56,
  • F. Archilli27,
  • P. d’Argent12,
  • J. Arnau Romeu6,
  • A. Artamonov39,
  • M. Artuso61,
  • K. Arzymatov37,
  • E. Aslanides6,
  • M. Atzeni44,
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Journal of High Energy Physics volume 2019, Article number: 102 (2019) Cite this article

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Abstract

The prompt production of Λ +c baryons is studied in proton-lead collisions collected with the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of 1.58 nb−1 recorded at a nucleon-nucleon centre-of-mass energy of \( \sqrt{s_{\mathrm{NN}}}=5.02 \) TeV. Measurements of the differential cross-section and the forwardbackward production ratio are reported for Λ +c baryons with transverse momenta in the range 2 < pT < 10 GeV/c and rapidities in the ranges 1.5 < y∗ < 4.0 and −4.5 < y∗ < −2.5 in the nucleon-nucleon centre-of-mass system. The ratio of cross-sections of Λ +c baryons and D0 mesons is also reported. The results are compared with next-to-leading order calculations that use nuclear parton distribution functions.

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  1. Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil

    I. Bediaga, M. Cruz Torres, J. M. De Miranda, A. Gomes, A. Massafferri, J. Molina Rodriguez, A. C. dos Reis, l. Soares Lavra & R. Tourinho Jadallah Aoude

  2. Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil

    S. Amato, K. Carvalho Akiba, F. Da Cunha Marinho, L. De Paula, F. Ferreira Rodrigues, M. Gandelman, A. Hicheur, J. H. Lopes, I. Nasteva, J. M. Otalora Goicochea, E. Polycarpo, C. Potterat, M. S. Rangel, L. Silva de Oliveira & B. Souza De Paula

  3. Center for High Energy Physics, Tsinghua University, Beijing, China

    L. An, C. Chen, A. Davis, Y. Gan, Y. Gao, C. Gu, F. Jiang, T. Li, X. Liu, Z. Ren, J. Sun, Z. Tang, M. Wang, A. Xu, Z. Xu, Z. Yang, L. Zhang, W. C. Zhang & X. Zhu

  4. Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France

    M. Chefdeville, D. Decamp, Ph. Ghez, J. F. Marchand, M.-N. Minard, B. Pietrzyk, M. Reboud, S. T’Jampens, E. Tournefier & Z. Xu

  5. Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France

    Z. Ajaltouni, E. Cogneras, O. Deschamps, G. Gazzoni, C. Hadjivasiliou, M. Kozeiha, R. Lefèvre, J. Maratas, S. Monteil, P. Perret, B. Quintana, V. Tisserand & M. Vernet

  6. Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France

    J. Arnau Romeu, E. Aslanides, J. Cogan, D. Gerstel, R. Le Gac, O. Leroy, G. Mancinelli, M. Martin, C. Meaux, A. B. Morris, J. Serrano, A. Tayduganov & A. Tsaregorodtsev

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    Y. Amhis, V. Balagura, S. Barsuk, F. Bossu, D. Chamont, J. A. B. Coelho, F. Desse, F. Fleuret, J. Lefrançois, V. Lisovskyi, F. Machefert, C. Marin Benito, E. Maurice, V. Renaudin, P. Robbe, M. H. Schune, A. Usachov, M. Winn, G. Wormser & Y. Zhang

  8. LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

    E. Ben-Haim, E. Bertholet, P. Billoir, M. Charles, L. Del Buono, G. Dujany, V. V. Gligorov, A. Mogini, F. Polci, R. Quagliani, F. Reiss, A. Robert, E. S. Sepulveda & D. Y. Tou

  9. I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany

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  10. Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

    J. Albrecht, A. Birnkraut, M. Demmer, U. Eitschberger, R. Ekelhof, L. Gavardi, K. Heinicke, A. Heister, P. Ibis, P. Mackowiak, F. Meier, T. Mombächer, A. Mödden, J. Müller, V. Müller, R. Niet, S. Reichert, M. Schellenberg, T. Schmelzer, A. Seuthe, B. Spaan, H. Stevens, T. Tekampe & J. Wishahi

  11. Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany

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  12. Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany

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  26. INFN Sezione di Roma La Sapienza, Roma, Italy

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  27. Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands

    R. Aaij, S. Ali, F. Archilli, L. J. Bel, S. Benson, M. van Beuzekom, E. Dall’Occo, L. Dufour, S. Esen, M. Féo Pereira Rivello Carvalho, E. Govorkova, R. Greim, W. Hulsbergen, D. Hynds, E. Jans, P. Koppenburg, I. Kostiuk, M. Merk, M. Mulder, A. Pellegrino, C. Sanchez Gras, J. van Tilburg, N. Tuning, M. van Veghel, M. Veronesi, A. Vitkovskiy, J. A. de Vries & C. Vázquez Sierra

  28. Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands

    T. Ketel, G. Raven & V. Syropoulos

  29. Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland

    J. Bhom, J. Brodzicka, A. Dziurda, W. Kucewicz, M. Kucharczyk, T. Lesiak, B. Malecki, A. Ossowska, M. Pikies & M. Witek

  30. AGH - University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland

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  31. National Center for Nuclear Research (NCBJ), Warsaw, Poland

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  32. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania

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  33. Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia

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  34. Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia

    I. Belyaev, A. Danilina, V. Egorychev, D. Golubkov, T. Kvaratskheliya, D. Pereima, D. Savrina & A. Semennikov

  35. Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia

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  36. Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia

    S. Filippov, E. Gushchin & L. Kravchuk

  37. Yandex School of Data Analysis, Moscow, Russia

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  38. Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia

    A. Bondar, S. Eidelman, P. Krokovny, V. Kudryavtsev, T. Maltsev, L. Shekhtman & V. Vorobyev

  39. Institute for High Energy Physics (IHEP), Protvino, Russia

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    A. Alfonso Albero, M. Calvo Gomez, A. Camboni, S. Coquereau, L. Garrido, D. Gascon, R. Graciani Diaz, E. Graugés & X. Vilasis-Cardona

  41. Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

    B. Adeva, A. A. Alves Jr, O. Boente Garcia, M. Borsato, V. Chobanova, X. Cid Vidal, A. Dosil Suárez, A. Fernandez Prieto, A. Gallas Torreira, B. Garcia Plana, M. Lucio Martinez, D. Martinez Santos, M. Plo Casasus, J. Prisciandaro, M. Ramos Pernas, A. Romero Vidal, J. J. Saborido Silva, B. Sanmartin Sedes, C. Santamarina Rios, P. Vazquez Regueiro & M. Vieites Diaz

  42. European Organization for Nuclear Research (CERN), Geneva, Switzerland

    F. Alessio, I. Belyaev, F. Betti, M. P. Blago, S. Borghi, C. Bozzi, M. Brodski, J. Buytaert, W. Byczynski, D. H. Campora Perez, M. Cattaneo, Ph. Charpentier, S.-G. Chitic, M. Chrzaszcz, G. Ciezarek, M. Clemencic, J. Closier, V. Coco, P. Collins, T. Colombo, G. Coombs, G. Corti, B. Couturier, C. D’Ambrosio, O. De Aguiar Francisco, K. De Bruyn, A. Di Canto, H. Dijkstra, F. Dordei, M. Dorigo, P. Durante, D. Fazzini, P. Fernandez Declara, M. Ferro-Luzzi, M. Fontana, R. Forty, M. Frank, C. Frei, W. Funk, C. Färber, C. Gaspar, L. A. Granado Cardoso, L. Gruber, Yu. Guz, T. Gys, C. Haen, C. Hasse, M. Hatch, E. van Herwijnen, R. Jacobsson, D. Johnson, C. Joram, B. Jost, M. Karacson, T. Kvaratskheliya, D. Lacarrere, F. Lemaitre, R. Lindner, O. Lupton, O. Maev, M. Martinelli, R. Matev, Z. Mathe, M. McCann, D. Müller, N. Neufeld, N. S. Nolte, M. Palutan, G. Passaleva, A. Pearce, M. Pepe Altarelli, S. Perazzini, J. Pinzino, F. Pisani, S. Ponce, M. Ravonel Salzgeber, M. Roehrken, S. Roiser, T. Ruf, H. Schindler, B. Schmidt, A. Schopper, R. Schwemmer, A. Sergi, P. Seyfert, F. Stagni, S. Stahl, F. Teubert, E. Thomas, S. Tolk, N. Tuning, A. Valassi, S. Valat, R. Vazquez Gomez, J. V. Viana Barbosa, B. Voneki, F. F. Wilson & K. Wyllie

  43. Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

    G. Andreassi, V. Battista, A. Bay, V. Bellee, F. Blanc, M. De Cian, L. Ferreira Lopes, C. Fitzpatrick, S. Gianì, O. G. Girard, G. Haefeli, P. H. Hopchev, C. Khurewathanakul, A. K. Kuonen, V. Macko, M. Marinangeli, P. Marino, B. Maurin, T. Nakada, T. Nanut, T. D. Nguyen, C. Nguyen-Mau, P. R. Pais, L. Pescatore, G. Pietrzyk, F. Redi, A. B. Rodrigues, O. Schneider, M. Schubiger, P. Stefko, M. E. Stramaglia & M. T. Tran

  44. Physik-Institut, Universität Zürich, Zürich, Switzerland

    M. Atzeni, R. Bernet, C. Betancourt, Ia. Bezshyiko, A. Buonaura, J. García Pardiñas, E. Graverini, D. Lancierini, F. Lionetto, A. Mauri, K. Müller, P. Owen, A. Puig Navarro, N. Serra, R. Silva Coutinho, O. Steinkamp, B. Storaci, U. Straumann, A. Vollhardt, Z. Wang & A. Weiden

  45. NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

    A. Dovbnya & S. Kandybei

  46. Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine

    S. Koliiev & V. Pugatch

  47. University of Birmingham, Birmingham, United Kingdom

    S. Bifani, R. Calladine, G. Chatzikonstantinidis, N. Farley, P. Ilten, C. Lazzeroni, A. Mazurov, J. Plews, D. Popov, A. Sergi, N. K. Watson, T. Williams & K. A. Zarebski

  48. H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom

    M. Adinolfi, S. Bhasin, E. Buchanan, M. G. Chapman, J. Dalseno, S. T. Harnew, J. M. Kariuki, S. Maddrell-Mander, P. Naik, K. Petridis, G. J. Pomery, E. Price, C. Prouve, J. H. Rademacker, S. Richards & J. J. Velthuis

  49. Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

    M. O. Bettler, H. V. Cliff, B. Delaney, J. Garra Tico, V. Gibson, S. C. Haines, C. R. Jones, F. Keizer, M. Kenzie, G. H. Lovell, J. G. Smeaton, A. Trisovic, A. Tully, M. Vitti, D. R. Ward, I. Williams & S. A. Wotton

  50. Department of Physics, University of Warwick, Coventry, United Kingdom

    J. J. Back, T. Blake, A. Brossa Gonzalo, C. M. Costa Sobral, A. Crocombe, T. Gershon, M. Kreps, T. Latham, D. Loh, A. Mathad, E. Millard, A. Poluektov & J. Wicht

  51. STFC Rutherford Appleton Laboratory, Didcot, United Kingdom

    S. Easo, R. Nandakumar, A. Papanestis, S. Ricciardi & F. F. Wilson

  52. School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom

    L. Carson, P. E. L. Clarke, G. A. Cowan, R. Currie, S. Eisenhardt, E. Gabriel, S. Gambetta, K. Gizdov, F. Muheim, M. Needham, M. Pappagallo, S. Petrucci, S. Playfer, I. T. Smith & J. B. Zonneveld

  53. School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom

    M. Alexander, J. Beddow, D. Bobulska, C. T. Dean, L. Douglas, L. Eklund, S. Karodia, I. Longstaff, M. Schiller, F. J. P. Soler, P. Spradlin & M. Traill

  54. Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom

    T. J. V. Bowcock, G. Casse, F. Dettori, K. Dreimanis, S. Farry, V. Franco Lima, T. Harrison, K. Hennessy, D. Hutchcroft, P. J. Marshall, J. V. Mead, K. Rinnert, T. Shears, H. M. Wark & L. E. Yeomans

  55. Imperial College London, London, United Kingdom

    P. Alvarez Cartelle, S. Baker, U. Egede, A. Golutvin, M. Hecker, T. Humair, F. Kress, M. McCann, M. Patel, M. Smith, S. Stefkova, M. J. Tilley & D. Websdale

  56. School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

    R. B. Appleby, R. J. Barlow, W. Barter, S. Borghi, C. Burr, L. Capriotti, S. De Capua, D. Dutta, E. Gersabeck, M. Gersabeck, L. Grillo, R. Hidalgo Charman, M. Hilton, G. Lafferty, K. Maguire, A. McNab, D. Murray, C. Parkes, G. Sarpis & M. R. J. Williams

  57. Department of Physics, University of Oxford, Oxford, United Kingdom

    M. Bjørn, B. R. Gruberg Cazon, T. Hadavizadeh, T. H. Hancock, N. Harnew, D. Hill, J. Jalocha, M. John, N. Jurik, S. Malde, C. H. Murphy, A. Nandi, M. Pili, H. Pullen, A. Rollings, G. Veneziano, M. Vesterinen & G. Wilkinson

  58. Massachusetts Institute of Technology, Cambridge, MA, United States

    T. Boettcher, D. C. Craik, C. Weisser & M. Williams

  59. University of Cincinnati, Cincinnati, OH, United States

    S. Akar, T. Evans, Z. C. Huard, B. Meadows, E. Rodrigues, H. F. Schreiner & M. D. Sokoloff

  60. University of Maryland, College Park, MD, United States

    J. E. Andrews, B. Hamilton, A. Jawahery, W. Parker, J. Wimberley & Z. Yang

  61. Syracuse University, Syracuse, NY, United States

    M. Artuso, B. Batsukh, A. Beiter, S. Blusk, S. Ely, M. Kelsey, K. E. Kim, Z. Li, X. Liang, R. Mountain, I. Polyakov, M. S. Rudolph, T. Skwarnicki, S. Stone, A. Venkateswaran, J. Wang, M. Wilkinson, Y. Yao & X. Yuan

  62. Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil

    C. Göbel & V. Salustino Guimaraes

  63. University of Chinese Academy of Sciences, Beijing, China

    N. Beliy, J. He, W. Huang, P.-R. Li, X. Lyu, W. Qian, J. Qin, M. Saur, M. Szymanski, D. Vieira, Q. Xu & Y. Zheng

  64. School of Physics and Technology, Wuhan University, Wuhan, China

    H. Cai & L. Sun

  65. Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China

    B. Dey, W. Hu, Y. Wang, D. Xiao, Y. Xie, M. Xu, H. Yin, J. Yu & D. Zhang

  66. Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia

    D. A. Milanes, I. A. Monroy & J. A. Rodriguez Lopez

  67. Institut für Physik, Universität Rostock, Rostock, Germany

    O. Grünberg, M. Heß, N. Meinert, H. Viemann & R. Waldi

  68. Van Swinderen Institute, University of Groningen, Groningen, Netherlands

    C. J. G. Onderwater

  69. National Research Centre Kurchatov Institute, Moscow, Russia

    T. Likhomanenko, A. Malinin, O. Morgunova, A. Nogay, A. Petrov & V. Shevchenko

  70. National University of Science and Technology “MISIS”, Moscow, Russia

    F. Baryshnikov, S. Didenko, A. Golutvin, N. Polukhina & E. Shmanin

  71. National Research Tomsk Polytechnic University, Tomsk, Russia

    G. Panshin, S. Strokov & A. Vagner

  72. Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia - CSIC, Valencia, Spain

    L. M. Garcia Martin, L. Henry, F. Martinez Vidal, A. Oyanguren, C. Remon Alepuz, J. Ruiz Vidal & C. Sanchez Mayordomo

  73. University of Michigan, Ann Arbor, United States

    C. A. Aidala

  74. Los Alamos National Laboratory (LANL), Los Alamos, United States

    C. L. Da Silva & J. M. Durham

  75. Universidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brazil

    A. Gomes

  76. Laboratoire Leprince-Ringuet, Palaiseau, France

    V. Balagura, F. Fleuret & E. Maurice

  77. P.N. Lebedev Physical Institute, Russian Academy of Science (LPI RAS), Moscow, Russia

    N. Polukhina & M. Zavertyaev

  78. Università di Bari, Bari, Italy

    M. De Serio & S. Simone

  79. Università di Bologna, Bologna, Italy

    A. Carbone, D. Galli & C. Patrignani

  80. Università di Cagliari, Cagliari, Italy

    G. Manca, R. Oldeman & B. Saitta

  81. Università di Ferrara, Ferrara, Italy

    M. Andreotti, R. Calabrese, M. Corvo, M. Fiorini, E. Luppi, L. Minzoni, L. L. Pappalardo & L. Tomassetti

  82. Università di Genova, Genova, Italy

    R. Cardinale, G. Cavallero, F. Fontanelli & A. Petrolini

  83. Università di Milano Bicocca, Milano, Italy

    N. Belloli, M. Calvi, P. Carniti, D. Fazzini & C. Gotti

  84. Università di Roma Tor Vergata, Roma, Italy

    E. Santovetti

  85. Università di Roma La Sapienza, Roma, Italy

    A. Sarti & A. Sciubba

  86. AGH - University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland

    W. Kucewicz

  87. LIFAELS, La Salle, Universitat Ramon Llull, Barcelona, Spain

    M. Calvo Gomez, A. Camboni & X. Vilasis-Cardona

  88. Hanoi University of Science, Hanoi, Vietnam

    C. Nguyen-Mau

  89. Università di Padova, Padova, Italy

    D. Lucchesi & G. Simi

  90. Università di Pisa, Pisa, Italy

    R. Cenci, G. Punzi & S. Stracka

  91. Università degli Studi di Milano, Milano, Italy

    J. Fu, D. Marangotto, A. Merli & M. Petruzzo

  92. Università di Urbino, Urbino, Italy

    M. Veltri

  93. Università della Basilicata, Potenza, Italy

    C. Satriano

  94. Scuola Normale Superiore, Pisa, Italy

    M. J. Morello & T. Pajero

  95. Università di Modena e Reggio Emilia, Modena, Italy

    A. Bizzeti

  96. MSU - Iligan Institute of Technology (MSU-IIT), Iligan, Philippines

    J. Maratas

  97. Novosibirsk State University, Novosibirsk, Russia

    A. Bondar, S. Eidelman, P. Krokovny, V. Kudryavtsev, T. Maltsev, L. Shekhtman & V. Vorobyev

  98. Sezione INFN di Trieste, Trieste, Italy

    M. Dorigo

  99. Escuela Agrícola Panamericana, San Antonio de Oriente, Honduras

    J. Molina Rodriguez

  100. School of Physics and Information Technology, Shaanxi Normal University (SNNU), Xi’an, China

    W. C. Zhang

  101. Physics and Micro Electronic College, Hunan University, Changsha City, China

    J. Yu

  102. National Research University Higher School of Economics, Moscow, Russia

    F. Ratnikov

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