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arxiv: 1402.4430 · v2 · submitted 2014-02-18 · ✦ hep-ex

Recognition: unknown

Measurement of charged particle multiplicities and densities in pp collisions at sqrt{s}=7\;TeV in the forward region

R. Aaij , B. Adeva , M. Adinolfi , A. Affolder , Z. Ajaltouni , J. Albrecht , F. Alessio , M. Alexander
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S. Ali G. Alkhazov P. Alvarez Cartelle A.A. Alves Jr 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. Bj{\o}rnstad 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. van den 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. D\'el\'eage D. Derkach O. Deschamps F. Dettori A. Di Canto H. Dijkstra S. Donleavy F. Dordei M. Dorigo P. Dorosz A. Dosil Su\'arez 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. F\"arber 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. G\"obel D. Golubkov A. Golutvin A. Gomes H. Gordon M. Grabalosa G\'andara R. Graciani Diaz L.A. Granado Cardoso E. Graug\'es G. Graziani A. Grecu E. Greening S. Gregson P. Griffith L. Grillo O. Gr\"unberg 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. He\ss 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. Lef\`evre A. Leflat J. Lefran\c{c}ois 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. M\"arki J. Marks G. Martellotti A. Martens A. Mart\'in S\'anchez 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. Mord\`a M.J. Morello R. Mountain F. Muheim K. M\"uller 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. Pila\v{r} 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 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. V\'azquez 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. Vo\ss 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 (LHCb collaboration)
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classification ✦ hep-ex
keywords chargedforwardparticlecollisionsdownkinematicmomentamultiplicities
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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 down to $2\;$GeV/$c$ and transverse momenta down to $0.2\;$GeV/$c$. The measurements are performed using minimum-bias 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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