Measurement of charged particle multiplicities in pp collisions at √s=7 TeV in the forward region

Aaij, R. et al. (2012) Measurement of charged particle multiplicities in pp collisions at √s=7 TeV in the forward region. European Physical Journal C, 72(1947), (doi: 10.1140/epjc/s10052-012-1947-8)

Abstract

Charged particle production in proton-proton collisions is studied with the LHCb detector at a centre-of-mass energy of s√=7 TeV in different intervals of pseudorapidity η. Charged particles are reconstructed close to the interaction region in the vertex detector, which provides high reconstruction efficiency in the η ranges −2.5<η<−2.0 and 2.0<η<4.5. The data were taken with a minimum bias trigger, only requiring one or more reconstructed tracks in the vertex detector. By selecting an event sample with at least one track with a transverse momentum greater than 1 GeV/c a hard QCD subsample is investigated. Several event generators are compared with the data; none are able to describe fully the multiplicity distributions or the charged particle density distribution as a function of η. In general, the models underestimate charged particle production.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Pappagallo, Dr Marco and Alexander, Dr Michael and Spradlin, Dr Patrick and MacRaighne, Dr Aaron and Rodrigues, Dr Eduardo and Bates, Mrs Alison and Soler, Professor Paul and Borghi, Dr Silvia and Plackett, Dr Richard and Eklund, Prof Lars
• Authors: Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amhis, Y., Anderson, J., Appleby, R. B., Aquines Gutierrez, O., Archilli, F., Arrabito, L., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Bachmann, S., Back, J. J., Bailey, D. S., Balagura, V., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Bates, A., Bauer, C., Bauer, T., Bay, A., Bediaga, I., Belogurov, S., Belous, K., Belyaev, I., Ben-Haim, E., Benayoun, M., Bencivenni, G., Benson, S., Benton, J., Bernet, R., Bettler, M.-O., Beuzekom, M., Bien, A., Bifani, S., Bird, T., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blanks, C., Blouw, J., Blusk, S., Bobrov, A., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Bowcock, T. J. V., Bozzi, C., Brambach, T., Brand, J., Bressieux, J., Brett, D., Britsch, M., Britton, T., Brook, N. H., Brown, H., Büchler-Germann, A., Burducea, I., Bursche, A., Buytaert, J., Cadeddu, S., Callot, O., Calvi, M., Calvo Gomez, M., Camboni, A., Campana, P., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carson, L., Carvalho Akiba, K., Casse, G., Cattaneo, M., Cauet, C., Charles, M., Charpentier, P., Chiapolini, N., Ciba, K., Cid Vidal, X., Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Collins, P., Comerma-Montells, A., Constantin, F., Conti, G., Contu, A., Cook, A., Coombes, M., Corti, G., Cowan, G. A., Currie, R., D’Almagne, B., D’Ambrosio, C., David, P., David, P. N. Y., Bonis, I., Capua, S., Cian, M., Lorenzi, F., Miranda, J. M., Paula, L., Simone, P., Decamp, D., Deckenhoff, M., Degaudenzi, H., Deissenroth, M., Buono, L., Deplano, C., Derkach, D., Deschamps, O., Dettori, F., Dickens, J., Dijkstra, H., Diniz Batista, P., Domingo Bonal, F., Donleavy, S., Dordei, F., Dosil Suárez, A., Dossett, D., Dovbnya, A., Dupertuis, F., Dzhelyadin, R., Dziurda, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., Eijk, D., Eisele, F., Eisenhardt, S., Ekelhof, R., Eklund, L., Elsasser, C., Elsby, D., Esperante Pereira, D., Estève, L., Falabella, A., Fanchini, E., Färber, C., Fardell, G., Farinelli, C., Farry, S., Fave, V., Fernandez Albor, V., Ferro-Luzzi, M., Filippov, S., Fitzpatrick, C., Fontana, M., Fontanelli, F., Forty, R., Frank, M., Frei, C., Frosini, M., Furcas, S., Gallas Torreira, A., Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garnier, J.-C., Garofoli, J., Garra Tico, J., Garrido, L., Gascon, D., Gaspar, C., Gauvin, N., Gersabeck, M., Gershon, T., Ghez, P., Gibson, V., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gordon, H., Grabalosa Gándara, M., Graciani Diaz, R., Granado Cardoso, L. A., Graugés, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Gui, B., Gushchin, E., Guz, Y., Gys, T., Haefeli, G., Haen, C., Haines, S. C., Hampson, T., Hansmann-Menzemer, S., Harji, R., Harnew, N., Harrison, J., Harrison, P. F., He, J., Heijne, V., Hennessy, K., Henrard, P., Hernando Morata, J. A., Herwijnen, E., Hicks, E., Holubyev, K., Hopchev, P., Hulsbergen, W., Hunt, P., Huse, T., Huston, R. S., Hutchcroft, D., Hynds, D., Iakovenko, V., Ilten, P., Imong, J., Jacobsson, R., Jaeger, A., Jahjah Hussein, M., Jans, E., Jansen, F., Jaton, P., Jean-Marie, B., Jing, F., John, M., Johnson, D., Jones, C. R., Jost, B., Kaballo, M., Kandybei, S., Karacson, M., Karbach, T. M., Keaveney, J., Kenyon, I. R., Kerzel, U., Ketel, T., Keune, A., Khanji, B., Kim, Y. M., Knecht, M., Koppenburg, P., Kozlinskiy, A., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., Krokovny, P., Kruse, F., Kruzelecki, K., Kucharczyk, M., Kvaratskheliya, T., Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lambert, R. W., Lanciotti, E., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Gac, R., Leerdam, J., Lees, J.-P., Lefèvre, R., Leflat, A., Lefrançois, J., Leroy, O., Lesiak, T., Li, L., Li Gioi, L., Lieng, M., Liles, M., Lindner, R., Linn, C., Liu, B., Liu, G., Lopes, J. H., Lopez Asamar, E., Lopez-March, N., Lu, H., Luisier, J., MacRaighne, A., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Magnin, J., Malde, S., Mamunur, R. M. D., Manca, G., Mancinelli, G., Mangiafave, N., Marconi, U., Märki, R., Marks, J., Martellotti, G., Martens, A., Martin, L., Martín Sánchez, A., Martinez Santos, D., Massafferri, A., Mathe, Z., Matteuzzi, C., Matveev, M., Maurice, E., Maynard, B., Mazurov, A., McGregor, G., McNulty, R., Mclean, C., Meissner, M., Merk, M., Merkel, J., Messi, R., Miglioranzi, S., Milanes, D. A., Minard, M.-N., Molina Rodriguez, J., Monteil, S., Moran, D., Morawski, P., Mountain, R., Mous, I., Muheim, F., Müller, K., Muresan, R., Muryn, B., Muster, B., Musy, M., Mylroie-Smith, J., Naik, P., Nakada, T., Nandakumar, R., Nasteva, I., Nedos, M., Needham, M., Neufeld, N., Nguyen-Mau, C., Nicol, M., Niess, V., Nikitin, N., Nomerotski, A., Novoselov, A., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Ogilvy, S., Okhrimenko, O., Oldeman, R., Orlandea, M., Otalora Goicochea, J. M., Owen, P., Pal, K., Palacios, J., Palano, A., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Paterson, S. K., Patrick, G. N., Patrignani, C., Pavel-Nicorescu, C., Pazos Alvarez, A., Pellegrino, A., Penso, G., Pepe Altarelli, M., Perazzini, S., Perego, D. L., Perez Trigo, E., Pérez-Calero Yzquierdo, A., Perret, P., Perrin-Terrin, M., Pessina, G., Petrella, A., Petrolini, A., Phan, A., Picatoste Olloqui, E., Pie Valls, B., Pietrzyk, B., Pilař, T., Pinci, D., Plackett, R., Playfer, S., Plo Casasus, M., Polok, G., Poluektov, A., Polycarpo, E., Popov, D., Popovici, B., Potterat, C., Powell, A., Pree, T., Prisciandaro, J., Pugatch, V., Puig Navarro, A., Qian, W., Rademacker, J. H., Rakotomiaramanana, B., Rangel, M. S., Raniuk, I., Raven, G., Redford, S., Reid, M. M., Reis, A. C., Ricciardi, S., Rinnert, K., Roa Romero, D. A., Robbe, P., Rodrigues, E., Rodrigues, F., Rodriguez Perez, P., Rogers, G. J., Roiser, S., Romanovsky, V., Rosello, M., Rouvinet, J., Ruf, T., Ruiz, H., Sabatino, G., Saborido Silva, J. J., Sagidova, N., Sail, P., Saitta, B., Salzmann, C., Sannino, M., Santacesaria, R., Santamarina Rios, C., Santinelli, R., Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savrie, M., Savrina, D., Schaack, P., Schiller, M., Schleich, S., Schlupp, M., Schmelling, M., Schmidt, B., Schneider, O., Schopper, A., Schune, M.-H., Schwemmer, R., Sciascia, B., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Sepp, I., Serra, N., Serrano, J., Seyfert, P., Shao, B., Shapkin, M., Shapoval, I., Shatalov, P., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, O., Shevchenko, V., Shires, A., Silva Coutinho, R., Skwarnicki, T., Smith, A. C., Smith, N. A., Smith, E., Sobczak, K., Soler, F.J.P., Solomin, A., Soomro, F., Souza De Paula, B., Spaan, B., Sparkes, A., Spradlin, P., Stagni, F., Stahl, S., Steinkamp, O., Stoica, S., Stone, S., Storaci, B., Straticiuc, M., Straumann, U., Subbiah, V. K., Swientek, S., Szczekowski, M., Szczypka, P., Szumlak, T., T’Jampens, S., Teodorescu, E., Teubert, F., Thomas, C., Thomas, E., Tilburg, J., Tisserand, V., Tobin, M., Topp-Joergensen, S., Torr, N., Tournefier, E., Tran, M. T., Tsaregorodtsev, A., Tuning, N., Ubeda Garcia, M., Ukleja, A., Urquijo, P., Uwer, U., Vagnoni, V., Valenti, G., Vazquez Gomez, R., Vazquez Regueiro, P., Vecchi, S., Velthuis, J. J., Veltri, M., Viaud, B., Videau, I., Vilasis-Cardona, X., Visniakov, J., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Voss, H., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Webber, A. D., Websdale, D., Whitehead, M., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wishahi, J., Witek, M., Witzeling, W., Wotton, S. A., Wyllie, K., Xie, Y., Xing, F., Xing, Z., Yang, Z., Young, R., Yushchenko, O., Zavertyaev, M., Zhang, F., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhong, L., Zverev, E., and Zvyagin, A.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: European Physical Journal C
• Publisher: Springer
• ISSN: 1434-6044
• ISSN (Online): 1434-6052
• Copyright Holders: Copyright © 2012 CERN, for the benefit of the LHCb collaboration
• First Published: First published in European Physical Journal C 72:1947
• Publisher Policy: Reproduced under Creative Commons License