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Measurement of V0 production ratios in pp collisions at s√ = 0.9 and 7TeV

  • R. Aaij
  • , B. Adeva
  • , M. Adinolfi
  • , C. Adrover
  • , A. Affolder
  • , Z. Ajaltouni
  • , J. Albrecht
  • , F. Alessio
  • , M. Alexander
  • , G. Alkhazov
  • , P. Alvarez Cartelle
  • , A. A. Alves
  • , S. Amato
  • , Y. Amhis
  • , J. Anderson
  • , R. B. Appleby
  • , O. Aquines Gutierrez
  • , L. Arrabito
  • , A. Artamonov
  • , M. Artuso
  • E. Aslanides, G. Auriemma, S. Bachmann, J. J. Back, D. S. Bailey, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, A. Bates, C. Bauer, T. Bauer, A. Bay, I. Bediaga, K. Belous, I. Belyaev, E. Ben-Haim, M. Benayoun, G. Bencivenni, S. Benson, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, C. Blanks, J. Blouw, S. Blusk, A. Bobrov, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, T. J.V. Bowcock, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, S. Brisbane, M. Britsch, T. Britton, N. H. Brook, A. Büchler-Germann, I. Burducea, A. Bursche, J. Buytaert, S. Cadeddu, J. M.Caicedo Carvajal, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, L. Carson, K. Carvalho Akiba, G. Casse, M. Cattaneo, M. Charles, P. Charpentier, N. Chiapolini, X. Cid Vidal, G. Ciezarek, P. E.L. Clarke, M. Clemencic, H. V. Cliff, J. Closier, C. Coca, V. Coco, J. Cogan, P. Collins, F. Constantin, G. Conti, A. Contu, M. Coombes, G. Corti, G. A. Cowan, R. Currie, B. D'Almagne, C. D'Ambrosio, P. David, I. De Bonis, S. De Capua, M. De Cian, F. De Lorenzi, J. M. De Miranda, L. De Paula, P. De Simone, D. Decamp, M. Deckenhoff, H. Degaudenzi, M. Deissenroth, L. Del Buono, C. Deplano, O. Deschamps, F. Dettori, J. Dickens, H. Dijkstra, P. Diniz Batista, D. Dossett, A. Dovbnya, F. Dupertuis, R. Dzhelyadin, C. Eames, S. Easo, U. Egede, V. Egorychev, S. Eidelman, D. Van Eijk, F. Eisele, S. Eisenhardt, R. Ekelhof, L. Eklund, C. Elsasser, D. G. D'Enterria, D. Esperante Pereira, L. Estève, A. Falabella, E. Fanchini, C. Färber, G. Fardell, C. Farinelli, S. Farry, V. Fave, V. Fernandez Albor, M. Ferro-Luzzi, S. Filippov, C. Fitzpatrick, M. Fontana, F. Fontanelli, R. Forty, M. Frank, C. Frei, M. Frosini, S. Furcas, A. Gallas Torreira, D. Galli, M. Gandelman, P. Gandini, Y. Gao, J. C. Garnier, J. Garofoli, J. Garra Tico, L. Garrido, C. Gaspar, N. Gauvin, M. Gersabeck, T. Gershon, P. Ghez, V. Gibson, V. V. Gligorov, C. Göbel, D. Golubkov, A. Golutvin, A. Gomes, H. Gordon, M. Grabalosa Gándara, R. Graciani Diaz, L. A.Granado Cardoso, E. Graugés, G. Graziani, A. Grecu, S. Gregson, B. Gui, E. Gushchin, Y. Guz, T. Gys, G. Haefeli, C. Haen, S. C. Haines, T. Hampson, S. Hansmann-Menzemer, R. Harji, N. Harnew, J. Harrison, P. F. Harrison, J. He, V. Heijne, K. Hennessy, P. Henrard, J. A.Hernando Morata, E. Van Herwijnen, W. Hofmann, K. Holubyev, P. Hopchev, W. Hulsbergen, P. Hunt, T. Huse, R. S. Huston, D. Hutchcroft, D. Hynds, V. Iakovenko, P. Ilten, J. Imong, R. Jacobsson, A. Jaeger, M. Jahjah Hussein, E. Jans, F. Jansen, P. Jaton, B. Jean-Marie, F. Jing, M. John, D. Johnson, C. R. Jones, B. Jost, S. Kandybei, M. Karacson, T. M. Karbach, J. Keaveney, U. Kerzel, T. Ketel, A. Keune, B. Khanji, Y. M. Kim, M. Knecht, S. Koblitz, P. Koppenburg, A. Kozlinskiy, L. Kravchuk, K. Kreplin, M. Kreps, G. Krocker, P. Krokovny, F. Kruse, K. Kruzelecki, M. Kucharczyk, S. Kukulak, R. Kumar, T. Kvaratskheliya, V. N. La Thi, D. Lacarrere, G. Lafferty, A. Lai, D. Lambert, R. W. Lambert, E. Lanciotti, G. Lanfranchi, C. Langenbruch, T. Latham, R. Le Gac, J. Van Leerdam, J. P. Lees, R. Lefèvre, A. Leflat, J. Lefranccois, O. Leroy, T. Lesiak, L. Li, Y. Y. Li, L. Li Gioi, M. Lieng, R. Lindner, C. Linn, B. Liu, G. Liu, J. H. Lopes, E. Lopez Asamar, N. Lopez-March, J. Luisier, F. Machefert, I. V. Machikhiliyan, F. Maciuc, O. Maev, J. Magnin, S. Malde, R. M.D. Mamunur, G. Manca, G. Mancinelli, N. Mangiafave, U. Marconi, R. Märki, J. Marks, G. Martellotti, A. Martens, L. Martin, A. Martín Sánchez, D. Martinez Santos, A. Massafferri, Z. Mathe, C. Matteuzzi, M. Matveev, E. Maurice, B. Maynard, A. Mazurov, G. McGregor, R. McNulty, C. Mclean, M. Meissner, M. Merk, J. Merke, R. Messi, S. Miglioranzi, D. A. Milanes, M. N. Minard, S. Monteil, D. Moran, P. Morawski, J. V. Morris, R. Mountain, I. Mous, F. Muheim, K. Müller, R. Muresan, B. Muryn, M. Musy, P. Naik, T. Nakada, R. Nandakumar, J. Nardulli, I. Nasteva, M. Nedos, M. Needham, N. Neufeld, C. Nguyen-Mau, M. Nicol, S. Nies, V. Niess, N. Nikitin, A. Oblakowska-Mucha, V. Obraztsov, S. Oggero, S. Ogilvy, O. Okhrimenko, R. Oldeman, M. Orlandea, J. M.Otalora Goicochea, P. Owen, B. Pal, J. Palacios, M. Palutan, J. Panman, A. Papanestis, M. Pappagallo, C. Parkes, C. J. Parkinson, G. Passaleva, G. D. Patel, M. Patel, S. K. Paterson, G. N. Patrick, C. Patrignani, C. Pavel-Nicorescu, A. Pazos Alvarez, A. Pellegrino, G. Penso, M. Pepe Altarelli, S. Perazzini, D. L. Perego, E. Perez Trigo, A. Pérez Calero Yzquierdo, P. Perret, M. Perrin-Terrin, G. Pessina, A. Petrella, A. Petrolini, B. Pie Valls, B. Pietrzyk, T. Pilar, D. Pinci, R. Plackett, S. Playfer, M. Plo Casasus, G. Polok, A. Poluektov, E. Polycarpo, D. Popov, B. Popovici, C. Potterat, A. Powell, T. Du Pree, J. Prisciandaro, V. Pugatch, A. Puig Navarro, W. Qian, J. H. Rademacker, B. Rakotomiaramanana, I. Raniuk, G. Raven, S. Redford, M. M. Reid, A. C. Dos Reis, S. Ricciardi, K. Rinnert, D. A.Roa Romero, P. Robbe, E. Rodrigues, F. Rodrigues, P. Rodriguez Perez, G. J. Rogers, V. Romanovsky, J. Rouvinet, T. Ruf, H. Ruiz, G. Sabatino, J. J.Saborido Silva, N. Sagidova, P. Sail, B. Saitta, C. Salzmann, M. Sannino, R. Santacesaria, R. Santinelli, E. Santovetti, M. Sapunov, A. Sarti, C. Satriano, A. Satta, M. Savrie, D. Savrina, P. Schaack, M. Schiller, S. Schleich, M. Schmelling, B. Schmidt, O. Schneider, A. Schopper, M. H. Schune, R. Schwemmer, A. Sciubba, M. Seco, A. Semennikov, K. Senderowska, I. Sepp, N. Serra, J. Serrano, P. Seyfert, B. Shao, M. Shapkin, I. Shapoval, P. Shatalov, Y. Shcheglov, T. Shears, L. Shekhtman, O. Shevchenko, V. Shevchenko, A. Shires, R. Silva Coutinho, H. P. Skottowe, T. Skwarnicki, A. C. Smith, N. A. Smith, K. Sobczak, F. J.P. Soler, A. Solomin, F. Soomro, B. Souza De Paula, B. Spaan, A. Sparkes, P. Spradlin, F. Stagni, S. Stahl, O. Steinkamp, S. Stoica, S. Stone, B. Storaci, M. Straticiuc, U. Straumann, N. Styles, S. Swientek, M. Szczekowski, P. Szczypka, T. Szumlak, S. T'Jampens, E. Teodorescu, F. Teubert, C. Thomas, E. Thomas, J. Van Tilburg, V. Tisserand, M. Tobin, S. Topp-Joergensen, M. T. Tran, A. Tsaregorodtsev, N. Tuning, A. Ukleja, P. Urquijo, U. Uwer, V. Vagnoni, G. Valenti, R. Vazquez Gomez, P. Vazquez Regueiro, S. Vecchi, J. J. Velthuis, M. Veltri, K. Vervink, B. Viaud, I. Videau, X. Vilasis-Cardona, J. Visniakov, A. Vollhardt, D. Voong, A. Vorobyev, H. Voss, K. Wacker, S. Wandernoth, J. Wang, D. R. Ward, A. D. Webber, D. Websdale, M. Whitehead, D. Wiedner, L. Wiggers, G. Wilkinson, M. P. Williams, M. Williams, F. F. Wilson, J. Wishahi, M. Witek, W. Witzeling, S. A. Wotton, K. Wyllie, Y. Xie, F. Xing, Z. Yang, R. Young, O. Yushchenko, M. Zavertyaev, L. Zhang, W. C. Zhang, Y. Zhang, A. Zhelezov, L. Zhong, E. Zverev, A. Zvyagin
  • National Institute for Subatomic Physics
  • University of Santiago de Compostela
  • University of Bristol
  • Aix-Marseille Université
  • University of Liverpool
  • Université Clermont Auvergne
  • CERN
  • University of Glasgow
  • Nuclear Physics Institute
  • National Institute for Nuclear Physics
  • Universidade Federal do Rio de Janeiro
  • Swiss Federal Institute of Technology Lausanne
  • University of Zurich
  • University of Manchester
  • Max Planck Institute for Nuclear Physics
  • IN2P3-CNRS
  • Institute for High Energy Physics of National Research Centre ‘Kurchatov Institute’
  • Syracuse University
  • University of Basilicata
  • Heidelberg University 
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Université Paris-Sud
  • University of Cambridge
  • Centro Brasileiro de Pesquisas Físicas
  • Université Pierre et Marie Curie
  • University of Edinburgh
  • University College Dublin
  • University of Modena and Reggio Emilia
  • Imperial College London
  • Novosibirsk State University
  • TU Dortmund University
  • Vrije Universiteit Amsterdam
  • University of Oxford
  • Horia Hulubei National Institute of Physics and Nuclear Engineering
  • University of Milan - Bicocca
  • University of Barcelona
  • Ramon Llull University
  • University of Rome Tor Vergata
  • University of Genoa
  • Université Savoie Mont Blanc
  • University of Cagliari
  • University of Warwick
  • NASU - Kharkov Institute of Physics and Technology
  • Rutherford Appleton Laboratory
  • ICREA
  • University of Ferrara
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • University of Florence
  • University of Bologna
  • Tsinghua University
  • Pontifícia Universidade Católica do Rio de Janeiro
  • NASU - Institute of Nuclear Research
  • Polish Academy of Sciences
  • Lomonosov Moscow State University
  • Faculty of Physics and Applied Computer Science
  • Vietnam National University, Hanoi
  • University of Bari
  • University of Rome La Sapienza
  • Andrzej Soltan Institute for Nuclear Studies
  • University of Urbino
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The Ā/A and Ā/K0S production ratios are measured by the LHCb detector from 0.3 nb-1 of pp collisions delivered by the LHC at s√ = 0.9TeV and 1.8 nb-1 at s√ = 7TeV. Both ratios are presented as a function of transverse momentum, pT, and rapidity, y, in the ranges 0.15 < pT < 2.50GeV/c and 2.0 < y < 4.5. Results at the two energies are in good agreement as a function of rapidity loss, Δy = ybeam - y, and are consistent with previous measurements. The ratio Ā/A, measuring the transport of baryon number from the collision into the detector, is smaller in data than predicted in simulation, particularly at high rapidity. The ratio Ā/K0 S , measuring the baryon-to-meson suppression in strange quark hadronisation, is significantly larger than expected.

Original languageEnglish
Article number34
JournalJournal of High Energy Physics
Volume2011
Issue number8
DOIs
StatePublished - 2011

Keywords

  • Hadron-hadron scattering

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