Measurement of J/ψ production in pp collisions at $\sqrt{s}=2.76\;\mathrm{TeV}$

A Mazurov,D Elsby,S Easo,G Bencivenni,O Kochebina,A Romero Vidal,M Perrin-Terrin,J Rouvinet,O Grünberg,C Gaspar,W Witzeling,D Brett,S Roiser,A Puig Navarro,E Lopez Asamar,M Tresch,E Lanciotti,E Van Herwijnen,H Luo,C Parkes,A Zvyagin,E Santovetti,G Pessina,S Oggero,M Karacson,D Van Eijk,G Manca,M Frosini,F Dordei,M Seco,M T Tran,M Dogaru,M Kaballo,P Szczypka,S Hall,N Mangiafave,B Schmidt,V K Subbiah,S Monteil,M Sapunov,V Kudryavtsev,S C Haines,F Dupertuis,A Bates,G Valenti,E Picatoste Olloqui,T Hartmann,D Tonelli,D Pinci,D Dossett,M Zangoli,A Ukleja,J Bressieux,L Kravchuk,A Phan,D L Perego,E Thomas,M Van Beuzekom,G Polok,S Nisar,M Veltri,S Hansmann-Menzemer,G Passaleva,L Shekhtman,Ch Cauet,M Calvo Gomez,C Thomas,R Graciani Diaz,P Collins,B Storaci,U Eitschberger,J M Otalora Goicochea,M Gandelman,D Lambert,K Senderowska,N Neufeld,A Satta,P Schaack,A Kozlinskiy,L De Paula,J Wishahi,S Blusk,R Silva Coutinho,D Ferguson,S Ricciardi,T M Karbach,T Pilař,T Huse,G Auriemma,J Blouw,L Del Buono,D Websdale,H Brown,S A Wotton,D Voong,T Nikodem,F Polci,J Lefrançois,Y Li,M Schmelling,P Spradlin,F J P Soler,C Salzmann,F Fontanelli,E Teodorescu,F Maciuc,S Eidelman,M Meissner,G Penso,P De Simone,M Teklishyn,I Mous,A Falabella,F Kruse,J Panman,H Degaudenzi,T J V Bowcock,A Vorobyev,P Owen,A Palano,O Aquines Gutierrez,A Vollhardt,V Vorobyev,J Wicht,G Carboni,F Teubert,R Schwemmer,O Steinkamp,D Savrina,E Hicks,C Baesso,V Gibson,H Schindler,C Matteuzzi,J Marks,M Hoballah,P Jaton,R F Koopman,T Hampson,F Stagni,R Niet,D Martins Tostes,R Jacobsson,V Syropoulos,U Straumann,M Benayoun,K Müller,J Imong,G Fardell,M Deckenhoff,B Couturier,D Hynds,P Tsopelas,V Fave,J He,K Kreplin,M Merk,V Vagnoni,S Donleavy,V V Gligorov,S Cunliffe,F F Wilson,J Luisier,R Dzhelyadin,M Szczekowski,J Anderson,A Grecu,A Dovbnya,V Egorychev,B Muster,C Linn,J Prisciandaro,C Langenbruch,J Benton,V Obraztsov,A C Dos Reis,I Nasteva,P Perret,J M De Miranda,C Bozzi,G Krocker,A Adametz,L A Granado Cardoso,A A Alves,A Sciubba,S Swientek,G Graziani,M De Cian,N K Watson,O Okhrimenko,V Tisserand,P E L Clarke,A Sparkes,W De Silva,D Urner,A Zhokhov,S Gregson,G Sabatino,T Bird,S Stoica,R Mcnulty,O Maev,A Gallas Torreira,A Mac Raighne,N Chiapolini,F Xing,C Göbel,M Pappagallo,E Furfaro,S Playfer,K De Bruyn,J A Hernando Morata,S Kandybei,J Closier,A Pérez-Calero Yzquierdo,A Zhelezov,S Tolk,M Vesterinen,B Gui,M Ubeda Garcia,M Kucharczyk,B Souza De Paula,R B Appleby,G N Patrick,G Corti,G D Patel,G J Rogers,J Mccarthy,A Papanestis,I Sepp,M Palutan,C Voß,J Garofoli,P Hunt,V Rives Molina,S Topp-Joergensen,D Wiedner,V Shevchenko,C Potterat,J Van Leerdam,A D Nguyen,A Dosil Suárez,P Campana,C Coca,L Li Gioi,G Lanfranchi,R Santacesaria,D A Roa Romero,A Schopper,B Spaan,M Needham,S Farry,E Jans,N Tuning,R W Lambert,P Naik,E Bowen,J Harrison,P Henrard,W Bonivento,R Lindner,O Yushchenko,H V Cliff,S Wright,L Zhong,B Pietrzyk,O Callot,G Alkhazov,F Jansen,M Coombes,V Bocci,M Straticiuc,S Belogurov,S Malde,V Fernandez Albor,Y Shcheglov,M Patel,H Voss,J Van Tilburg,D Galli,C Farinelli,M Shapkin,A Massafferri,S Perazzini,C Adrover,Z Xing,R Ekelhof,M Matveev,C Lazzeroni,F Machefert,L Carson,T Gys,B K Pal,A Borgia,L Wiggers,R Vazquez Gomez,A Dzyuba,A Richards,E Greening,T Britton,B Rakotomiaramanana,C Satriano,S Ali,Ph Charpentier,A Novoselov,A Bay,R Nandakumar,H Ruiz,T D Nguyen,S Schleich,X Cid Vidal,E Rodrigues,B Viaud,R J Barlow,I Raniuk,D Volyanskyy,R Andreassen,S T Harnew,P Sail,M.-N Minard,B Popovici,Yu Guz,E Polycarpo,I Komarov,A Bobrov,A Semennikov,S Vecchi,W Baldini,M M Reid,O Schneider,X Yuan,C Fitzpatrick,A Jaeger,R Le Gac,J J Back,I De Bonis,A Martín Sánchez,A Lai,I Shapoval,R Gauld,J Serrano,C Barschel,C Deplano,E Gushchin,U Uwer,B Jost,N Torr,A Di Canto,A Tsaregorodtsev,U Kerzel,R Lefèvre,F Blanc,C Hadjivasiliou,S Redford,P Alvarez Cartelle,R Mountain,P Garosi,A Gomes,K Belous,E Tournefier,T Ruf,F Ferreira Rodrigues,F Muheim,M Britsch,M Tobin,M Pepe Altarelli,S Filippov,I El Rifai,Y Zhang,J Von Loeben,F Domingo Bonal,C Hombach,N H Brook,R Wallace,A Leflat,C R Jones,V Heijne,A Keune,G Haefeli,D R Ward,G Mancinelli,B Sanmartin Sedes,A Shires,A Cook,V Niess,N Hussain,J H Lopes,D Vieira,S Furcas,R Märki,S Tourneur,R Currie,C Färber,H Carranza-Mejia,K Carvalho Akiba,S Wandernoth,M Nicol,R Matev,E Ben-Haim,I R Kenyon,I Burducea,M D Sokoloff,A Petrolini,P Krokovny,Th Bauer,W Qian,C Blanks,T Brambach,C Haen,P M Bjørnstad,U Egede,G Martellotti,A Martens,G Ciezarek,U Marconi,N Rauschmayr,G Veneziano,M S Rangel,S Ogilvy,A Contu,M Liles,K Wyllie,M Grabalosa Gándara,V N La Thi,I V Machikhiliyan,F Soomro,C Pavel-Nicorescu,Ph Ghez,M Schlupp,A Bursche,B Muryn,M Witek,P Seyfert,A D Webber,A Golutvin,P Morawski,T Kvaratskheliya,M Orlandea,V Romanovsky,A Dziurda,N Sagidova,D Souza,E Cogneras,C Patrignani,A Büchler-Germann,A Powell,S De Capua,K Ciba,G Raven,J Beddow,P Gandini,D Popov,A Bizzeti,Ch Elsässer ,Z Máthé ,A Comerma-Montells,S Wu,P Rodríguez Pérez ,T Latham,В Яковенко ,M Schiller,M Calvi,R Waldi,T Skwarnicki,O Deschamps,N López-March ,M Gersabeck,A Poluektov,M O Bettler ,P H Hopchev ,R Oldeman,C J Parkinson,L Anderlini,M Pló Casasús ,G Liu,G Casse,S Bachmann,J Albrecht,E Aslanides,M Whitehead,A Obłąkowska-Mucha ,C D’Ambrosio,S Amato,P Chen,A Cardini,E Graugés,F Zhang,S Stahl,N Harnew,S Stone,B Saitta,L Zhang,F Jing,M John,J H Rademacker,N Serra,M Frank,L Eklund,P Koppenburg,T Blake,P David,H A Gordon ,R Mureşan ,H Dijkstra,A Pellegrino,P Vázquez Regueiro ,V Balagura,M Charles,D Golubkov,N Nikitin,Y Amhis,S Borghi,H Lu,M Adinolfi,G Cowan ,A Bondar,C Nguyen-Mau,N Bondar,J Dickens,B Sciascia,F Archilli,E Pérez Trigo ,M P Williams,A Berezhnoy,C Frei,T Gershon,V Coco,B Khanji,J Van Den Brand,V Pugatch,G D Lafferty ,M Alexander,F Meier,T Shears,R Aaij,Z Ajaltouni,M Williams,P F Harrison,F Dettori,M Artuso,S Bifani,K Rinnert,D Décamp ,P Diniz Batista,A Affolder,M Zavertyaev,I Belyaev,S Benson,Z Yang,R Cardinale,M Smith,D Moran,А Артамонов ,S Cadeddu,D Hutchcroft,S Eisenhardt,A Nomerotski,E Maurice,S T’Jampens,Д Деркач ,I Bediaga,A Sarti,P Robbe,X Vilasis‐Cardona ,A Pazos Álvarez ,M Ferro‐Luzzi ,G Wilkinson,K Sobczak,M Martinelli,D Johnson,M H Schune ,T Nakada,D Martínez Santos ,C Santamarina Ríos ,M Clemencic,F Alessio,P Ilten,O Francisco,E Smith,L M Garcia Martin ,B Liu,О Shevchenko ,J Cogan,D A Milanés ,R Bernet,K Petridis,B Meadows,A Bień ,R Forty,K Hennessy,W Barter,П Б Шаталов ,J J Saborido Silva,J P Lees ,C Abellán Beteta ,Ll Garrido ,W C Zhang,T Ketel,D Hill,N Smith ,M Sannino,M Cattaneo,J Molina Rodriguez,M Chrząszcz ,M Fontana,J J Velthuis,E Gersabeck,S Barsuk,D C Craik ,O Leroy,B Adeva,A Carbone,Y Gao,J Wang,D Lacarrère ,M Kreps,R Young,J Buytaert,W Hulsbergen,Y Xie,M Savrié ,J Garra Ticó ,М Королев ,T Szumlak,A Camboni

doi:10.1007/jhep02(2013)041

Abstract

Abstract The production of J/ψ mesons is studied with the LHCb detector using data from pp collisions at $\sqrt{s}=2.76$ TeV corresponding to an integrated luminosity of 71 nb−1. The differential cross-section for inclusive J/ψ production is measured as a function of its transverse momentum p T. The cross-section in the fiducial region 0 < p T < 12 GeV/c and rapidity 2.0 < $y$ < 4.5 is measured to be 5.6 ± 0.1 (stat) ± 0.4 (syst) μb, with the assumption of unpolarised J/ψ production. The fraction of J/ψ production from b-hadron decays is measured to be (7.1 ± 0.6 (stat) ± 0.7 (syst))%.

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