학술논문

Measurement of the ratio of prompt $\chi_{c}$ to $J/\psi$ production in $pp$ collisions at $\sqrt{s}=7$ TeV
Document Type
Working Paper
Author
LHCb CollaborationAaij, R.Beteta, C. AbellanAdeva, B.Adinolfi, M.Adrover, C.Affolder, A.Ajaltouni, Z.Albrecht, J.Alessio, F.Alexander, M.Ali, S.Alkhazov, G.Cartelle, P. AlvarezAlves Jr, A. A.Amato, S.Amhis, Y.Anderson, J.Appleby, R. B.Gutierrez, O. AquinesArchilli, F.Arrabito, L.Artamonov, A.Artuso, M.Aslanides, E.Auriemma, G.Bachmann, S.Back, J. J.Balagura, V.Baldini, W.Barlow, R. J.Barschel, C.Barsuk, S.Barter, W.Bates, A.Bauer, C.Bauer, Th.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.van 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. van denBressieux, J.Brett, D.Britsch, M.Britton, T.Brook, N. H.Brown, H.de Bruyn, K.Büchler-Germann, A.Burducea, I.Bursche, A.Buytaert, J.Cadeddu, S.Callot, O.Calvi, M.Gomez, M. CalvoCamboni, A.Campana, P.Carbone, A.Carboni, G.Cardinale, R.Cardini, A.Carson, L.Akiba, K. CarvalhoCasse, G.Cattaneo, M.Cauet, Ch.Charles, M.Charpentier, Ph.Chiapolini, N.Ciba, K.Vidal, X. CidCiezarek, G.Clarke, P. E. L.Clemencic, M.Cliff, H. V.Closier, J.Coca, C.Coco, V.Cogan, J.Collins, P.Comerma-Montells, A.Contu, A.Cook, A.Coombes, M.Corti, G.Couturier, B.Cowan, G. A.Currie, R.D'Ambrosio, C.David, P.David, P. N. Y.De Bonis, I.De Capua, S.De Cian, M.De Lorenzi, F.De Miranda, J. M.De Paula, L.De Simone, P.Decamp, D.Deckenhoff, M.Degaudenzi, H.Del Buono, L.Deplano, C.Derkach, D.Deschamps, O.Dettori, F.Dickens, J.Dijkstra, H.Batista, P. DinizBonal, F. DomingoDonleavy, S.Dordei, F.Suárez, A. DosilDossett, D.Dovbnya, A.Dupertuis, F.Dzhelyadin, R.Dziurda, A.Easo, S.Egede, U.Egorychev, V.Eidelman, S.van Eijk, D.Eisele, F.Eisenhardt, S.Ekelhof, R.Eklund, L.Elsasser, Ch.Elsby, D.Pereira, D. EsperanteFalabella, A.Färber, C.Fardell, G.Farinelli, C.Farry, S.Fave, V.Albor, V. FernandezFerro-Luzzi, M.Filippov, S.Fitzpatrick, C.Fontana, M.Fontanelli, F.Forty, R.Francisco, O.Frank, M.Frei, C.Frosini, M.Furcas, S.Torreira, A. GallasGalli, D.Gandelman, M.Gandini, P.Gao, Y.Garnier, J-C.Garofoli, J.Tico, J. GarraGarrido, L.Gascon, D.Gaspar, C.Gauld, R.Gauvin, N.Gersabeck, M.Gershon, T.Ghez, Ph.Gibson, V.Gligorov, V. V.Göbel, C.Golubkov, D.Golutvin, A.Gomes, A.Gordon, H.Gándara, M. GrabalosaDiaz, R. GracianiCardoso, L. A. GranadoGraugés, E.Graziani, G.Grecu, A.Greening, E.Gregson, S.Gui, B.Gushchin, E.Guz, Yu.Gys, T.Hadjivasiliou, C.Haefeli, G.Haen, C.Haines, S. C.Hampson, T.Hansmann-Menzemer, S.Harji, R.Harnew, N.Harrison, J.Harrison, P. F.Hartmann, T.He, J.Heijne, V.Hennessy, K.Henrard, P.Morata, J. A. Hernandovan 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.Hussein, M. JahjahJans, 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.Koopman, R. F.Koppenburg, P.Korolev, M.Kozlinskiy, A.Kravchuk, L.Kreplin, K.Kreps, M.Krocker, G.Krokovny, P.Kruse, F.Kruzelecki, K.Kucharczyk, M.Kudryavtsev, V.Kvaratskheliya, T.La 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. Levan Leerdam, J.Lees, J. -P.Lefèvre, R.Leflat, A.Lefrançois, J.Leroy, O.Lesiak, T.Li, L.Gioi, L. LiLieng, M.Liles, M.Lindner, R.Linn, C.Liu, B.Liu, G.von Loeben, J.Lopes, J. H.Asamar, E. LopezLopez-March, N.Lu, H.Luisier, J.Mac Raighne, 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.Sánchez, A. MartínMartinelli, M.Santos, D. MartinezMassafferri, A.Mathe, Z.Matteuzzi, C.Matveev, M.Maurice, E.Maynard, B.Mazurov, A.McGregor, G.McNulty, R.Meissner, M.Merk, M.Merkel, J.Miglioranzi, S.Milanes, D. A.Minard, M. -N.Rodriguez, J. MolinaMonteil, S.Moran, D.Morawski, P.Mountain, R.Mous, I.Muheim, F.Müller, K.Muresan, R.Muryn, B.Muster, B.Mylroie-Smith, J.Naik, P.Nakada, T.Nandakumar, R.Nasteva, I.Needham, M.Neufeld, N.Nguyen, A. D.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.Goicochea, J. M. OtaloraOwen, 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.Alvarez, A. PazosPellegrino, A.Penso, G.Altarelli, M. PepePerazzini, S.Perego, D. L.Trigo, E. PerezYzquierdo, A. Pérez-CaleroPerret, P.Perrin-Terrin, M.Pessina, G.Petrolini, A.Phan, A.Olloqui, E. PicatosteValls, B. PiePietrzyk, B.Pilař, T.Pinci, D.Plackett, R.Playfer, S.Casasus, M. PloPolok, G.Poluektov, A.Polycarpo, E.Popov, D.Popovici, B.Potterat, C.Powell, A.Prisciandaro, J.Pugatch, V.Navarro, A. PuigQian, W.Rademacker, J. H.Rakotomiaramanana, B.Rangel, M. S.Raniuk, I.Raven, G.Redford, S.Reid, M. M.Reis, A. C. dosRicciardi, S.Richards, A.Rinnert, K.Romero, D. A. RoaRobbe, P.Rodrigues, E.Rodrigues, F.Perez, P. RodriguezRogers, G. J.Roiser, S.Romanovsky, V.Rosello, M.Rouvinet, J.Ruf, T.Ruiz, H.Sabatino, G.Silva, J. J. SaboridoSagidova, N.Sail, P.Saitta, B.Salzmann, C.Sannino, M.Santacesaria, R.Rios, C. SantamarinaSantinelli, 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.Shapkin, M.Shapoval, I.Shatalov, P.Shcheglov, Y.Shears, T.Shekhtman, L.Shevchenko, O.Shevchenko, V.Shires, A.Coutinho, R. SilvaSkwarnicki, T.Smith, N. A.Smith, E.Sobczak, K.Soler, F. J. P.Solomin, A.Soomro, F.De Paula, B. SouzaSpaan, 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.van Tilburg, J.Tisserand, V.Tobin, M.Topp-Joergensen, S.Torr, N.Tournefier, E.Tourneur, S.Tran, M. T.Tsaregorodtsev, A.Tuning, N.Garcia, M. UbedaUkleja, A.Urquijo, P.Uwer, U.Vagnoni, V.Valenti, G.Gomez, R. VazquezRegueiro, P. VazquezVecchi, S.Velthuis, J. J.Veltri, M.Viaud, B.Videau, I.Vieira, D.Vilasis-Cardona, X.Visniakov, J.Vollhardt, A.Volyanskyy, D.Voong, D.Vorobyev, A.Voss, H.Waldi, R.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.Zangoli, M.Zavertyaev, M.Zhang, F.Zhang, L.Zhang, W. C.Zhang, Y.Zhelezov, A.Zhong, L.Zvyagin, A.
Source
Physics Letters B 718 (2012), pp. 431-440
Subject
High Energy Physics - Experiment
Language
Abstract
The prompt production of charmonium $\chi_{c}$ and $J/\psi$ states is studied in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=7$ TeV at the Large Hadron Collider. The $\chi_{c}$ and $J/\psi$ mesons are identified through their decays $\chi_{c}\rightarrow J/\psi \gamma$ and $J/\psi\rightarrow \mu^+\mu^-$ using 36 pb$^{-1}$ of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for $\chi_{c}$ and $J/\psi$, $\sigma (\chi_{c}\rightarrow J/\psi \gamma)/ \sigma (J/\psi)$, is determined as a function of the $J/\psi$ transverse momentum in the range $2 < p_{\mathrm T}^{J/\psi} < 15$ GeV/$c$. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low $p_{\mathrm T}^{J/\psi}$ region.
Comment: Published version