Measurement of J / ψ polarization in pp collisions at √(s)=7 TeV
R. Aaij,C. Abellan Beteta,B. Adeva,M. Adinolfi, C. Adrover,A. Affolder, Z. Ajaltouni,J. Albrecht,F. Alessio,M. Alexander,S. Ali, G. Alkhazov,P. Alvarez Cartelle,A. A. Alves Jr, S. Amato, S. Amerio,Y. Amhis,L. Anderlini,J. Anderson, R. Andreassen,R. B. Appleby,O. Aquines Gutierrez,F. Archilli, A. Artamonov,M. Artuso, E. Aslanides,G. Auriemma,S. Bachmann,J. J. Back,C. Baesso,V. Balagura,W. Baldini,R. J. Barlow,C. Barschel, S. Barsuk,W. Barter,Th. Bauer, A. Bay, J. Beddow,F. Bedeschi, I. Bediaga,S. Belogurov, K. Belous, I. Belyaev,E. Ben-Haim,M. Benayoun,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,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, I. Burducea, A. Bursche,G. Busetto, J. Buytaert,S. Cadeddu, 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. Castillo Garcia,M. Cattaneo,Ch. Cauet,M. Charles,Ph. Charpentier,P. Chen, 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, B. Couturier, G. A. Cowan,D. C. Craik,S. Cunliffe,R. Currie, C. D’Ambrosio,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, D. Derkach,O. Deschamps,F. Dettori,A. Di Canto, H. Dijkstra, M. Dogaru,S. Donleavy,F. Dordei,A. Dosil Suárez,D. Dossett,A. Dovbnya,F. Dupertuis, R. Dzhelyadin,A. Dziurda,A. Dzyuba,S. Easo,U. Egede, V. Egorychev,S. Eidelman,D. van Eijk,S. Eisenhardt, U. Eitschberger, R. Ekelhof, L. Eklund,I. El Rifai,Ch. Elsasser, D. Elsby, A. Falabella, C. Färber, G. Fardell, C. Farinelli,S. Farry,V. Fave, D. Ferguson,V. Fernandez Albor,F. Ferreira Rodrigues, M. Ferro-Luzzi,S. Filippov,M. Fiore,C. Fitzpatrick,M. Fontana, F. Fontanelli, R. Forty, O. Francisco, M. Frank, C. Frei,M. Frosini, S. Furcas,E. Furfaro,A. Gallas Torreira,D. Galli,M. Gandelman,P. Gandini, Y. Gao, J. Garofoli, P. Garosi,J. Garra Tico, L. Garrido, C. Gaspar,R. Gauld,E. Gersabeck,M. Gersabeck, T. Gershon,Ph. Ghez,V. Gibson,V. V. Gligorov, C. Göbel,D. Golubkov, A. Golutvin,A. Gomes,H. Gordon,C. Gotti,M. Grabalosa Gándara,R. Graciani Diaz,L. A. Granado Cardoso,E. Graugés, G. Graziani,A. Grecu,E. Greening,S. Gregson, O. Grünberg,B. Gui,E. Gushchin,Yu. Guz, T. Gys,C. Hadjivasiliou, G. Haefeli, C. Haen,S. C. Haines,S. Hall,T. Hampson, S. Hansmann-Menzemer,N. Harnew,S. T. Harnew, J. Harrison,T. Hartmann, J. He,V. Heijne,K. Hennessy, P. Henrard,J. A. Hernando Morata, E. van Herwijnen, A. Hicheur,E. Hicks, D. Hill,M. Hoballah,C. Hombach,P. Hopchev, W. Hulsbergen, P. Hunt, T. Huse,N. Hussain,D. Hutchcroft,D. Hynds, V. Iakovenko,M. Idzik,P. Ilten,R. Jacobsson,A. Jaeger,E. Jans, P. Jaton, F. Jing,M. John, D. Johnson,C. R. Jones,C. Joram, B. Jost, M. Kaballo,S. Kandybei, M. Karacson, T. M. Karbach,I. R. Kenyon,U. Kerzel,T. Ketel, A. Keune, B. Khanji,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, 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, L. Li Gioi,M. Liles,R. Lindner, C. Linn,B. Liu,G. Liu,S. Lohn, I. Longstaff,J. H. Lopes,E. Lopez Asamar,N. Lopez-March,H. Lu,D. Lucchesi,J. Luisier,H. Luo, F. Machefert, I. V. Machikhiliyan, F. Maciuc, O. Maev,S. Malde,G. Manca,G. Mancinelli,U. Marconi, R. Märki, J. Marks, G. Martellotti,A. Martens,A. Martín Sánchez,M. Martinelli,D. Martinez Santos,D. Martins Tostes, A. Martynov, A. Massafferri,R. Matev, Z. Mathe,C. Matteuzzi,E. Maurice, A. Mazurov,J. McCarthy, A. McNab,R. McNulty,B. Meadows, F. Meier,M. Meissner,M. Merk,D. A. Milanes, M.-N. Minard,J. Molina Rodriguez,S. Monteil,D. Moran, P. Morawski,M. J. Morello, R. Mountain,I. Mous,F. Muheim, K. Müller, R. Muresan, B. Muryn,B. Muster,P. Naik,T. Nakada,R. Nandakumar,I. Nasteva,M. Needham,N. Neufeld,A. D. Nguyen,T. D. Nguyen, C. Nguyen-Mau,M. Nicol,V. Niess, R. Niet, N. Nikitin, T. Nikodem,A. Nomerotski, A. Novoselov,A. Oblakowska-Mucha,V. Obraztsov, S. Oggero,S. Ogilvy, O. Okhrimenko, R. Oldeman,M. Orlandea,J. M. Otalora Goicochea,P. Owen, A. Oyanguren, B. K. Pal,A. Palano,M. Palutan, J. Panman, A. Papanestis,M. Pappagallo,C. Parkes,C. J. Parkinson,G. Passaleva, G. D. Patel, M. Patel,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,K. Petridis,A. Petrolini,A. Phan,E. Picatoste Olloqui,B. Pietrzyk, T. Pilař,D. Pinci, S. Playfer,M. Plo Casasus,F. Polci,G. Polok,A. Poluektov, E. Polycarpo,D. Popov,B. Popovici,C. Potterat, A. Powell,J. Prisciandaro,A. Pritchard, C. Prouve,V. Pugatch,A. Puig Navarro,G. Punzi, W. Qian, J. H. Rademacker,B. Rakotomiaramanana, M. S. Rangel,I. Raniuk,N. Rauschmayr,G. Raven,S. Redford,M. M. Reid, A. C. dos Reis,S. Ricciardi,A. Richards,K. Rinnert,V. Rives Molina,D. A. Roa Romero, P. Robbe,E. Rodrigues,P. Rodriguez Perez, S. Roiser,V. Romanovsky, A. Romero Vidal, J. Rouvinet,T. Ruf,F. Ruffini,H. Ruiz,P. Ruiz Valls,G. Sabatino,J. J. Saborido Silva, N. Sagidova, P. Sail,B. Saitta,C. Salzmann,B. Sanmartin Sedes, M. Sannino,R. Santacesaria,C. Santamarina Rios,E. Santovetti,M. Sapunov,A. Sarti,C. Satriano,A. Satta, M. Savrie, D. Savrina,P. Schaack,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, P. Shatalov,Y. Shcheglov,T. Shears,L. Shekhtman,O. Shevchenko, V. Shevchenko,A. Shires,R. Silva Coutinho,T. Skwarnicki,N. A. Smith,E. Smith,M. Smith,M. D. Sokoloff,F. J. P. Soler, F. Soomro,D. Souza,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,V. K. Subbiah, S. Swientek,V. Syropoulos, M. Szczekowski, P. Szczypka,T. Szumlak, S. T’Jampens,M. Teklishyn,E. Teodorescu, F. Teubert,C. Thomas,E. Thomas,J. van Tilburg,V. Tisserand,M. Tobin, S. Tolk,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, D. Urner, U. Uwer,V. Vagnoni, G. Valenti,R. Vazquez Gomez,P. Vazquez Regueiro,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, R. Waldi, 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. Wishahi,M. Witek,S. A. Wotton, S. Wright,S. Wu, K. Wyllie,Y. Xie,Z. Xing,Z. Yang,R. Young,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（2013）
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摘要
n angular analysis of the decay J / ψ → μ + μ − is performed to measure the polarization of prompt J / ψ mesons produced in pp collisions at √(s)=7 TeV . The dataset corresponds to an integrated luminosity of 0.37 fb −1 collected with the LHCb detector. The measurement is presented as a function of transverse momentum, p T , and rapidity, y , of the J / ψ meson, in the kinematic region 2< p T <15 GeV/ c and 2.0< y <4.5.
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关键词
Transverse Momentum,Systematic Uncertainty,Polarization Axis,Polarization Parameter,Primary Vertex
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