Measurement of charged particle multiplicities and densities in $$$$ collisions at $$\sqrt{s}=7\;$$s=7TeV in the forward region
The LHCb Collaboration, R. Aaij,B. Adeva,M. Adinolfi,A. Affolder, Z. Ajaltouni,J. Albrecht, F. Alessio,M. Alexander, S. Ali, G. Alkhazov,P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis,L. Anderlini, J. Anderson,R. Andreassen, M. Andreotti, J. E. Andrews, R. B. Appleby,O. Aquines Gutierrez,F. Archilli, A. Artamonov,M. Artuso, E. Aslanides, G. Auriemma,M. Baalouch,S. Bachmann, J. J. Back,A. Badalov,V. Balagura, W. Baldini,R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya,Th. Bauer, A. Bay, J. Beddow, F. Bedeschi, I. Bediaga,S. Belogurov, K. Belous,I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson,J. Benton, A. Berezhnoy, R. Bernet,M.-O. Bettler,M. van Beuzekom,A. Bien,S. Bifani, T. Bird,A. Bizzeti,P. M. Bjørnstad,T. Blake, F. Blanc,J. Blouw,S. Blusk,V. Bocci,A. Bondar, N. Bondar,W. Bonivento,S. Borghi,A. Borgia,M. Borsato,T. J. V. Bowcock,E. Bowen, C. Bozzi,T. Brambach,J. vanden Brand,J. Bressieux,D. Brett, M. Britsch,T. Britton,N. H. Brook,H. Brown, A. Bursche,G. Busetto,J. Buytaert, S. Cadeddu,R. Calabrese,O. Callot, M. Calvi,M. Calvo Gomez, A. Camboni, P. Campana,D. Campora Perez,A. Carbone,G. Carboni,R. Cardinale, A. Cardini,H. Carranza-Mejia,L. Carson, K. Carvalho Akiba, G. Casse,L. Cassina,L. Castillo Garcia,M. Cattaneo,Ch. Cauet,R. Cenci, M. Charles,Ph. Charpentier,S.-F. Cheung,N. Chiapolini, M. Chrzaszcz,K. Ciba,X. Cid Vidal, G. Ciezarek, P. E. L. Clarke, M. Clemencic, H. V. Cliff, J. Closier,C. Coca,V. Coco, J. Cogan,E. Cogneras,P. Collins, A. Comerma-Montells,A. Contu,A. Cook,M. Coombes,S. Coquereau,G. Corti, I. Counts, B. Couturier, G. A. Cowan,D. C. Craik,M. Cruz Torres,S. Cunliffe, R. Currie, C. D’Ambrosio,J. Dalseno,P. David,P. N. Y. David,A. Davis, I. De Bonis, K. De Bruyn,S. De Capua,M. De Cian,J. M. De Miranda, L. De Paula,W. De Silva, P. De Simone, D. Decamp,M. Deckenhoff, L. Del Buono,N. Déléage, D. Derkach,O. Deschamps,F. Dettori,A. Di Canto, H. Dijkstra,S. Donleavy,F. Dordei,M. Dorigo,P. Dorosz,A. Dosil Suárez,D. Dossett, A. Dovbnya,F. Dupertuis,P. Durante,R. Dzhelyadin,A. Dziurda,A. Dzyuba,S. Easo,U. Egede, V. Egorychev,S. Eidelman,S. Eisenhardt, U. Eitschberger, R. Ekelhof,L. Eklund,I. El Rifai,Ch. Elsasser,S. Esen, A. Falabella, C. Färber,C. Farinelli, S. Farry,D. Ferguson,V. Fernandez Albor,F. Ferreira Rodrigues, M. Ferro-Luzzi,S. Filippov,M. Fiore, M. Fiorini,C. Fitzpatrick,M. Fontana,F. Fontanelli, R. Forty, O. Francisco, M. Frank,C. Frei,M. Frosini, J. Fu,E. Furfaro,A. Gallas Torreira,D. Galli, M. Gandelman,P. Gandini, Y. Gao,J. Garofoli,J. Garra Tico,L. Garrido,C. Gaspar,R. Gauld,L. Gavardi,E. Gersabeck,M. Gersabeck, T. Gershon, Ph. Ghez,A. Gianelle,S. Giani, V. Gibson, L. Giubega,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,E. Greening,S. Gregson,P. Griffith, L. Grillo, O. Grünberg,B. Gui,E. Gushchin,Yu. Guz,T. Gys, C. Hadjivasiliou, G. Haefeli, C. Haen,T. W. Hafkenscheid, S. C. Haines,S. Hall,B. Hamilton,T. Hampson, S. Hansmann-Menzemer, N. Harnew,S. T. Harnew,J. Harrison,T. Hartmann,J. He,T. Head,V. Heijne,K. Hennessy, P. Henrard,L. Henry,J. A. Hernando Morata,E. van Herwijnen, M. Heß,A. Hicheur, D. Hill,M. Hoballah,C. Hombach,W. Hulsbergen,P. Hunt,N. Hussain,D. Hutchcroft, D. Hynds,V. Iakovenko,M. Idzik,P. Ilten, R. Jacobsson,A. Jaeger,E. Jans,P. Jaton, A. Jawahery,F. Jing, M. John,D. Johnson,C. R. Jones, C. Joram, B. Jost,N. Jurik,M. Kaballo,S. Kandybei,W. Kanso, M. Karacson,T. M. Karbach, M. Kelsey, I. R. Kenyon, T. Ketel, B. Khanji, C. Khurewathanakul,S. Klaver,O. Kochebina,I. Komarov,R. F. Koopman,P. Koppenburg,M. Korolev,A. Kozlinskiy, L. Kravchuk,K. Kreplin,M. Kreps,G. Krocker, P. Krokovny,F. Kruse, M. Kucharczyk,V. Kudryavtsev,K. Kurek, 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,C. Lazzeroni,R. Le Gac,J. van Leerdam, J.-P. Lees,R. Lefèvre, A. Leflat, J. Lefrançois,S. Leo,O. Leroy,T. Lesiak, B. Leverington, Y. Li,M. Liles, R. Lindner, C. Linn,F. Lionetto, B. Liu,G. Liu,S. Lohn, I. Longstaff, J. H. Lopes,N. Lopez-March, P. Lowdon,H. Lu,D. Lucchesi,J. Luisier,H. Luo,E. Luppi,O. Lupton, F. Machefert,I. V. Machikhiliyan, F. Maciuc, O. Maev,S. Malde,G. Manca,G. Mancinelli,M. Manzali,J. Maratas, U. Marconi,P. Marino,R. Märki,J. Marks, G. Martellotti,A. Martens,A. Martín Sánchez, M. Martinelli,D. Martinez Santos, F. Martinez Vidal,D. Martins Tostes,A. Massafferri,R. Matev, Z. Mathe,C. Matteuzzi, A. Mazurov,M. McCann,J. McCarthy,A. McNab,R. McNulty,B. McSkelly, B. Meadows, F. Meier,M. Meissner,M. Merk, D. A. Milanes, M.-N. Minard,J. Molina Rodriguez,S. Monteil,D. Moran,M. Morandin,P. Morawski,A. Mordà,M. J. Morello, R. Mountain, F. Muheim,K. Müller,R. Muresan,B. Muryn, B. Muster, P. Naik,T. Nakada,R. Nandakumar,I. Nasteva,M. Needham, N. Neri,S. Neubert, N. Neufeld,A. D. Nguyen, T. D. Nguyen, C. Nguyen-Mau,M. Nicol,V. Niess, R. Niet, N. Nikitin,T. Nikodem,A. Novoselov, A. Oblakowska-Mucha,V. Obraztsov,S. Oggero, S. Ogilvy,O. Okhrimenko, R. Oldeman,G. Onderwater,M. Orlandea, J. M. Otalora Goicochea,P. Owen,A. Oyanguren,B. K. Pal,A. Palano,F. Palombo, M. Palutan,J. Panman, A. Papanestis, M. Pappagallo,L. Pappalardo,C. Parkes,C. J. Parkinson, G. Passaleva, G. D. Patel,M. Patel, C. Patrignani,C. Pavel-Nicorescu,A. Pazos Alvarez,A. Pearce,A. Pellegrino,G. Penso,M. Pepe Altarelli,S. Perazzini,E. Perez Trigo, P. Perret,M. Perrin-Terrin,L. Pescatore,E. Pesen, G. Pessina, K. Petridis,A. Petrolini,E. Picatoste Olloqui, B. Pietrzyk,T. Pilař,D. Pinci,A. Pistone,S. Playfer,M. Plo Casasus, F. Polci,G. Polok,A. Poluektov, E. Polycarpo, A. Popov, D. Popov,B. Popovici,C. Potterat,A. Powell,J. Prisciandaro,A. Pritchard, C. Prouve,V. Pugatch,A. Puig Navarro,G. Punzi, W. Qian, B. Rachwal,J. H. Rademacker,B. Rakotomiaramanana,M. Rama, M. S. Rangel, I. Raniuk,N. Rauschmayr,G. Raven,S. Redford,S. Reichert, M. M. Reid,A. C. dos Reis,S. Ricciardi,A. Richards, K. Rinnert,V. Rives Molina,D. A. Roa Romero,P. Robbe, D. A. Roberts, A. B. Rodrigues,E. Rodrigues,P. Rodriguez Perez, S. Roiser,V. Romanovsky,A. Romero Vidal,M. Rotondo,J. Rouvinet,T. Ruf,F. Ruffini,H. Ruiz,P. Ruiz Valls,G. Sabatino,J. J. Saborido Silva, N. Sagidova,P. Sail, B. Saitta, V. Salustino Guimaraes,B. Sanmartin Sedes,R. Santacesaria,C. Santamarina Rios,E. Santovetti,M. Sapunov,A. Sarti,C. Satriano, A. Satta,M. Savrie, D. Savrina,M. Schiller,H. Schindler,M. Schlupp,M. Schmelling,B. Schmidt,O. Schneider,A. Schopper, M.-H. Schune, R. Schwemmer,B. Sciascia, A. Sciubba,M. Seco, A. Semennikov,K. Senderowska, I. Sepp,N. Serra,J. Serrano,P. Seyfert, M. Shapkin,I. Shapoval, Y. Shcheglov,T. Shears, L. Shekhtman,O. Shevchenko, V. Shevchenko,A. Shires,R. Silva Coutinho,G. Simi, M. Sirendi, N. Skidmore, T. Skwarnicki,N. A. Smith,E. Smith,E. Smith,J. Smith,M. Smith,H. Snoek, M. D. Sokoloff,F. J. P. Soler,F. Soomro,D. Souza, B. Souza De Paula, B. Spaan,A. Sparkes,F. Spinella,P. Spradlin, F. Stagni,S. Stahl,O. Steinkamp,S. Stevenson,S. Stoica,S. Stone,B. Storaci,S. Stracka,M. Straticiuc, U. Straumann,R. Stroili,V. K. Subbiah,L. Sun,W. Sutcliffe, S. Swientek,V. Syropoulos, M. Szczekowski, P. Szczypka,D. Szilard,T. Szumlak, S. T’Jampens,M. Teklishyn, G. Tellarini,E. Teodorescu, F. Teubert, C. Thomas,E. Thomas,J. van Tilburg,V. Tisserand,M. Tobin, S. Tolk,L. Tomassetti,D. Tonelli,S. Topp-Joergensen,N. Torr, E. Tournefier,S. Tourneur, M. T. Tran,M. Tresch,A. Tsaregorodtsev,P. Tsopelas,N. Tuning,M. Ubeda Garcia,A. Ukleja,A. Ustyuzhanin, U. Uwer,V. Vagnoni, G. Valenti,A. Vallier,R. Vazquez Gomez,P. Vazquez Regueiro,C. Vázquez Sierra,S. Vecchi,J. J. Velthuis,M. Veltri,G. Veneziano,M. Vesterinen, B. Viaud, D. Vieira, X. Vilasis-Cardona, A. Vollhardt,D. Volyanskyy,D. Voong,A. Vorobyev,V. Vorobyev, C. Voß,H. Voss,J. A. de Vries, R. Waldi,C. Wallace,R. Wallace,S. Wandernoth,J. Wang,D. R. Ward,N. K. Watson,A. D. Webber,D. Websdale,M. Whitehead, J. Wicht,J. Wiechczynski, D. Wiedner,L. Wiggers,G. Wilkinson,M. P. Williams,M. Williams,F. F. Wilson,J. Wimberley, J. Wishahi,W. Wislicki,M. Witek,G. Wormser, S. A. Wotton,S. Wright, S. Wu,K. Wyllie, Y. Xie,Z. Xing,Z. Yang,X. Yuan, O. Yushchenko,M. Zangoli, M. Zavertyaev,F. Zhang, L. Zhang,W. C. Zhang, Y. Zhang, A. Zhelezov,A. Zhokhov,L. Zhong,A. Zvyagin
European Physical Journal C（2014）
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摘要
Charged particle multiplicities are studied in proton–proton collisions in the forward region at a centre-of-mass energy of \(\sqrt{s} = 7\;\)TeV with data collected by the LHCb detector. The forward spectrometer allows access to a kinematic range of \(2.0<\eta <4.8\) in pseudorapidity, momenta greater than \(2\;\text{ GeV/ }c\) and transverse momenta greater than \(0.2\;\text{ GeV/ }c\). The measurements are performed using events with at least one charged particle in the kinematic acceptance. The results are presented as functions of pseudorapidity and transverse momentum and are compared to predictions from several Monte Carlo event generators.
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关键词
Large Hadron Collider,Systematic Uncertainty,Multiplicity Distribution,Particle Multiplicity,Track Reconstruction
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