Observation of charmonium pairs produced exclusively in pp collisions

Aaij, R. et al. (2014) Observation of charmonium pairs produced exclusively in pp collisions. Journal of Physics G: Nuclear and Particle Physics, 41, 115002. (doi: 10.1088/0954-3899/41/11/115002)

Abstract

A search is performed for the central exclusive production of pairs of charmonia produced in proton-proton collisions. Using data corresponding to an integrated luminosity of 3 fb−1 collected at centre-of-mass energies of 7 and 8 TeV, J Jψ ψ and J S ψψ (2 ) pairs are observed, which have been produced in the absence of any other activity inside the LHCb acceptance that is sensitive to charged particles in the pseudorapidity ranges (− − 3.5, 1.5) and (1.5, 5.0). Searches are also performed for pairs of P-wave charmonia and limits are set on their production. The cross-sections for these processes, where the dimeson system has a rapidity between 2.0 and 4.5, are measured to be 58 10(stat) 6(syst) pb, 63 (stat) 10(syst) pb, 237 pb, 69 nb, 45 pb, 141 pb, S S S J J J (2 ) 18 27 (2 ) (2 ) c0 c0 c1 c1 c2 c2 σ σ σ σ σ σ =± ± = ± < < < < ψ ψ ψψ ψ ψ χ χ χ χ χ χ − + where the upper limits are set at the 90% confidence level. The measured J ψJ ψ and J ψψ (2S) cross-sections are consistent with theoretical expectations.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Pappagallo, Dr Marco and Alexander, Dr Michael and Sail, Mr Paul and Spradlin, Dr Patrick and Ogilvy, Mr Stephen and Soler, Professor Paul and Borghi, Dr Silvia and Eklund, Prof Lars and Hynds, Dr Daniel
• Authors: Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. A., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Anderson, J., Andreassen, R., Andreotti, M., Andrews, J. E., Appleby, R. B., Gutierrez, O. A., Archilli, F., Artamonov, A., Artuso, M., Aslanides, E., Auriemma, G., Baalouch, M., Bachmann, S., Back, J. J., Badalov, A., Balagura, V., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Barter, W., Batozskaya, V., Bauer, T., Bay, A., Beddow, J., Bedeschi, F., Bediaga, I., Belogurov, S., Belous, K., Belyaev, I., Ben-Haim, E., Bencivenni, G., Benson, S., Benton, J., Berezhnoy, A., Bernet, R., Bettler, M. -O., van Beuzekom, M., Bien, A., Bifani, S., Bird, T., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blouw, J., Blusk, S., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Borsato, M., Bowcock, T. J. V., Bowen, E., Bozzi, C., Brambach, T., van den Brand, J., Bressieux, J., Brett, D., Britsch, M., Britton, T., Brook, N. H., Brown, H., Bursche, A., Busetto, G., Buytaert, J., Cadeddu, S., Calabrese, R., Callot, O., Calvi, M., Gomez, M. C., Camboni, A., Campana, P., Perez, D. C., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carranza-Mejia, H., Carson, L., Akiba, K. C., Casse, G., Garcia, L. C., Cattaneo, M., Cauet, C., Cenci, R., Charles, M., Charpentier, P., Cheung, S.-F., Chiapolini, N., Chrzaszcz, M., Ciba, K., Vidal, X. C., Ciezarek, G., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Cogneras, E., Collins, P., Comerma-Montells, A., Contu, A., Cook, A., Coombes, M., Coquereau, S., Corti, G., Couturier, B., Cowan, G. A., Craik, D. C., Torres, M. C., Cunliffe, S., Currie, R., D’Ambrosio, C., Dalseno, J., David, P., David, P. N. Y., Davis, A., De Bonis, I., De Bruyn, K., De Capua, S., De Cian, M., De Miranda, J. M., De Paula, L., De Silva, W., De Simone, P., Decamp, D., Deckenhoff, M., Buono, L. D., Déléage, N., Derkach, D., Deschamps, O., Dettori, F., Canto, A. D., Dijkstra, H., Donleavy, S., Dordei, F., Dorosz, P., Suárez, A. D., Dossett, D., Dovbnya, A., Dupertuis, F., Durante, P., Dzhelyadin, R., Dziurda, A., Dzyuba, A., Easo, S., Egede, U., Egorychev, V., Eidelman, S., van Eijk, D., Eisenhardt, S., Eitschberger, U., Ekelhof, R., Eklund, L., Rifai, I. E., Elsasser, C., Falabella, A., Färber, C., Farinelli, C., Farry, S., Ferguson, D., Albor, V. F., Rodrigues, F. F., Ferro-Luzzi, M., Filippov, S., Fiore, M., Fiorini, M., Fitzpatrick, C., Fontana, M., Fontanelli, F., Forty, R., Francisco, O., Frank, M., Frei, C., Frosini, M., Furfaro, E., Torreira, A. G., Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garofoli, J., Garosi, P., Tico, J. G., Garrido, L., Gaspar, C., Gauld, R., Gersabeck, E., Gersabeck, M., Gershon, T., Ghez, P., Gianelle, A., Gibson, V., Giubega, L., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gordon, H., Gándara, M. G., Diaz, R. G., Cardoso, L. A. G., Graugés, E., Graziani, G., Grecu, A., Greening, E., Gregson, S., Griffith, P., Grillo, L., Grünberg, O., Gui, B., Gushchin, E., Guz, Y., Gys, T., Hadjivasiliou, C., Haefeli, G., Haen, C., Hafkenscheid, T. W., Haines, S. C., Hall, S., Hamilton, B., Hampson, T., Hansmann-Menzemer, S., Harnew, N., Harnew, S. T., Harrison, J., Hartmann, T., He, J., Head, T., Heijne, V., Hennessy, K., Henrard, P., Morata, J. A. H., van Herwijnen, E., Heß, M., Hicheur, A., Hill, D., Hoballah, M., Hombach, C., Hulsbergen, W., Hunt, P., Huse, T., Hussain, N., Hutchcroft, D., Hynds, D., Iakovenko, V., Idzik, M., Ilten, P., Jacobsson, R., Jaeger, A., Jans, E., Jaton, P., Jawahery, A., Jing, F., John, M., Johnson, D., Jones, C. R., Joram, C., Jost, B., Jurik, N., Kaballo, M., Kandybei, S., Kanso, W., Karacson, M., Karbach, T. M., Kenyon, I. R., Ketel, T., Khanji, B., Klaver, S., Kochebina, O., Komarov, I., Koopman, R. F., Koppenburg, P., Korolev, M., Kozlinskiy, A., Kravchuk, L., Kreplin, K., Kreps, M., Krocker, G., Krokovny, P., Kruse, F., Kucharczyk, M., Kudryavtsev, V., Kurek, K., Kvaratskheliya, T., Thi, V. N. L., Lacarrere, D., Lafferty, G., Lai, A., Lambert, D., Lambert, R. W., Lanciotti, E., Lanfranchi, G., Langenbruch, C., Latham, T., Lazzeroni, C., Le Gac, R., van Leerdam, J., Lees, J.-P., Lefèvre, R., Leflat, A., Lefrançois, J., Leo, S., Leroy, O., Lesiak, T., Leverington, B., Li, Y., Liles, M., Lindner, R., Linn, C., Lionetto, F., Liu, B., Liu, G., Lohn, S., Longstaff, I., Lopes, J. H., Lopez-March, N., Lowdon, P., Lu, H., Lucchesi, D., Luisier, J., Luo, H., Luppi, E., Lupton, O., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Malde, S., Manca, G., Mancinelli, G., Maratas, J., Marconi, U., Marino, P., Märki, R., Marks, J., Martellotti, G., Martens, A., Sánchez, A. M., Martinelli, M., Santos, D. M., Tostes, D. M., Massafferri, A., Matev, R., Mathe, Z., Matteuzzi, C., Mazurov, A., McCann, M., McCarthy, J., McNab, A., McNulty, R., McSkelly, B., Meadows, B., Meier, F., Meissner, M., Merk, M., Milanes, D. A., Minard, M.-N., Rodriguez, J. M., Monteil, S., Moran, D., Morandin, M., Morawski, P., Mordà, A., Morello, M. J., Mountain, R., Mous, I., Muheim, F., Müller, K., Muresan, R., Muryn, B., Muster, B., Naik, P., Nakada, T., Nandakumar, R., Nasteva, I., Needham, M., Neubert, S., Neufeld, N., Nguyen, A. D., Nguyen, T. D., Nguyen-Mau, C., Nicol, M., Niess, V., Niet, R., Nikitin, N., Nikodem, T., Novoselov, A., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Ogilvy, S., Okhrimenko, O., Oldeman, R., Onderwater, G., Orlandea, M., Goicochea, J. M. O., Owen, P., Oyanguren, A., Pal, B. K., Palano, A., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Pappalardo, L., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Patrignani, C., Pavel-Nicorescu, C., Alvarez, A. P., Pearce, A., Pellegrino, A., Penso, G., Altarelli, M. P., Perazzini, S., Trigo, E. P., Perret, P., Perrin-Terrin, M., Pescatore, L., Pesen, E., Pessina, G., Petridis, K., Petrolini, A., Olloqui, E. P., Pietrzyk, B., Pilař, T., Pinci, D., Pistone, A., Playfer, S., Casasus, M. P., Polci, F., Polok, G., Poluektov, A., Polycarpo, E., Popov, A., Popov, D., Popovici, B., Potterat, C., Powell, A., Prisciandaro, J., Pritchard, A., Prouve, C., Pugatch, V., Navarro, A. P., Punzi, G., Qian, W., Rachwal, B., Rademacker, J. H., Rakotomiaramanana, B., Rama, M., Rangel, M. S., Raniuk, I., Rauschmayr, N., Raven, G., Redford, S., Reichert, S., Reid, M. M., Reis, A. C. d., Ricciardi, S., Richards, A., Rinnert, K., Molina, V. R., Romero, D. A. R., Robbe, P., Roberts, D. A., Rodrigues, A. B., Rodrigues, E., Perez, P. R., Roiser, S., Romanovsky, V., Vidal, A. R., Rotondo, M., Rouvinet, J., Ruf, T., Ruffini, F., Ruiz, H., Valls, P. R., Sabatino, G., Silva, J. J. S., Sagidova, N., Sail, P., Saitta, B., Guimaraes, V. S., Sedes, B. S., Santacesaria, R., Rios, C. S., Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savrie, M., Savrina, D., Schiller, M., Schindler, H., 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., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, O., Shevchenko, V., Shires, A., Coutinho, R. S., Simi, G., Sirendi, M., Skidmore, N., Skwarnicki, T., Smith, N. A., Smith, E., Smith, E., Smith, J., Smith, M., Sokoloff, M. D., Soler, F.J.P., Soomro, F., Souza, D., De Paula, B. S., Spaan, B., Sparkes, A., Spradlin, P., Stagni, F., Stahl, S., Steinkamp, O., Stevenson, S., Stoica, S., Stone, S., Storaci, B., Stracka, S., Straticiuc, M., Straumann, U., Stroili, R., Subbiah, V. K., Sun, L., Sutcliffe, W., Swientek, S., Syropoulos, V., Szczekowski, M., Szczypka, P., Szilard, D., Szumlak, T., T’Jampens, S., Teklishyn, M., Tellarini, G., Teodorescu, E., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Tolk, S., Tomassetti, L., Tonelli, D., Topp-Joergensen, S., Torr, N., Tournefier, E., Tourneur, S., Tran, M. T., Tresch, M., Tsaregorodtsev, A., Tsopelas, P., Tuning, N., Garcia, M. U., Ukleja, A., Ustyuzhanin, A., Uwer, U., Vagnoni, V., Valenti, G., Vallier, A., Gomez, R. V., Regueiro, P. V., Sierra, C. V., Vecchi, S., Velthuis, J. J., Veltri, M., Veneziano, G., Vesterinen, M., Viaud, B., Vieira, D., Vilasis-Cardona, X., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, V., Voß, C., Voss, H., de Vries, J. A., Waldi, R., Wallace, C., Wallace, R., Wandernoth, S., Wang, J., Ward, D. R., Watson, N. K., Webber, A. D., Websdale, D., Whitehead, M., Wicht, J., Wiechczynski, J., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wimberley, J., Wishahi, J., Wislicki, W., Witek, M., Wormser, G., Wotton, S. A., Wright, S., Wu, S., Wyllie, K., Xie, Y., Xing, Z., Yang, Z., Yuan, X., Yushchenko, O., Zangoli, M., Zavertyaev, M., Zhang, F., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhokhov, A., Zhong, L., and Zvyagin, A.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Journal of Physics G: Nuclear and Particle Physics
• Publisher: IOP Publishing
• ISSN: 0954-3899
• ISSN (Online): 1361-6471
• Copyright Holders: Copyright © 2014 CERN on behalf of the LHCb Collaboration.
• First Published: First published in Journal of Physics G: Nuclear and Particle Physics 41:115002
• Publisher Policy: Reproduced under a Creative Commons License