Elastic and Proton-Dissociative Photoproduction of J/psi Mesons at HERA

Cross sections for elastic and proton-dissociative photoproduction of J/psi mesons are measured with the H1 detector in positron-proton collisions at HERA. The data were collected at $ep$ centre-of-mass energies sqrt{s} approx 318 GeV and sqrt{s} approx 225 GeV, corresponding to integrated luminosit...

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Detalles Bibliográficos
Autores principales: Alexa, C., Andreev, V., Baghdasaryan, A., Baghdasaryan, S., Bartel, W., Begzsuren, K., Belousov, A., Belov, P., Boudry, V., Bozovic-Jelisavcic, I., Brandt, G., Brinkmann, M., Brisson, V., Britzger, D., Buniatyan, A., Bylinkin, A., Bystritskaya, L., Campbell, A.J., Cantun Avila, K.B., Ceccopieri, F., Cerny, K., Chekelian, V., Contreras, J.G., Cvach, J., Dainton, J.B., Daum, K., De Wolf, E.A., Diaconu, C., Dobre, M., Dodonov, V., Dossanov, A., Eckerlin, G., Egli, S., Elsen, E., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fischer, D.J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Gouzevitch, M., Grab, C., Grebenyuk, A., Greenshaw, T., Grindhammer, G., Habib, S., Haidt, D., Henderson, R.C.W., Hennekemper, E., Herbst, M., Herrera, G., Hildebrandt, M., Hiller, K.H., Hladky, J., Hoffmann, D., Horisberger, R., Hreus, T., Huber, F., Jacquet, M., Janssen, X., Jonsson, L., Jung, H., Kapichine, M., Kiesling, C., Klein, M., Kleinwort, C., Kogler, R., Kostka, P., Kramer, M., Kretzschmar, J., Kruger, K., Landon, M.P.J., Lange, W., Laycock, P., Lebedev, A., Levonian, S., Lipka, K., List, B., List, J., Lobodzinski, B., Lopez-Fernandez, R., Lubimov, V., Malinovski, E., Martyn, H.U., Maxfield, S.J., Mehta, A., Meyer, A.B., Meyer, H., Meyer, J., Mikocki, S., Milcewicz-Mika, I., Morozov, A., Morris, J.V., Muller, K., Naumann, Th., Newman, P.R., Niebuhr, C., Nikitin, D., Nowak, G., Nowak, K., Olsson, J.E., Ozerov, D., Pahl, P., Palichik, V., Pandurovic, M., Pascaud, C., Patel, G.D., Perez, E., Petrukhin, A., Picuric, I., Pirumov, H., Pitzl, D., Placakyte, R., Pokorny, B., Polifka, R., Radescu, V., Raicevic, N., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J.E., Rusakov, S., Salek, D., Sankey, D.P.C., Sauter, M., Sauvan, E., Schmitt, S., Schoeffel, L., Schoning, A., Schultz-Coulon, H.C., Sefkow, F., Shushkevich, S., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Stoicea, G., Straumann, U., Sykora, T., Thompson, P.D., Traynor, D., Truol, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Valkarova, A., Vallee, C., Van Mechelen, P., Vazdik, Y., Wegener, D., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Z., Zlebcik, R., Zohrabyan, H., Zomer, F.
Lenguaje:eng
Publicado: 2013
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-013-2466-y
http://cds.cern.ch/record/1543138
Descripción
Sumario:Cross sections for elastic and proton-dissociative photoproduction of J/psi mesons are measured with the H1 detector in positron-proton collisions at HERA. The data were collected at $ep$ centre-of-mass energies sqrt{s} approx 318 GeV and sqrt{s} approx 225 GeV, corresponding to integrated luminosities of L = 130 pb^{-1} and L = 10.8 pb^{-1}, respectively. The cross sections are measured as a function of the photon-proton centre-of-mass energy in the range 25< Wgp < 110 GeV. Differential cross sections $\mathrm{d}\sigma / \mathrm{d}t$, where $t$ is the squared four-momentum transfer at the proton vertex, are measured in the range $|t| < 1.2 \, \gevsq$ for the elastic process and $|t| < 8 \, \gevsq$ for proton dissociation. The results are compared to other measurements. The $\Wgp$ and $t$-dependences are parametrised using phenomenological fits.

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