Measurement of the Q(2) and energy dependence of diffractive interactions at HERA

Chekanov, S. et al. (2002) Measurement of the Q(2) and energy dependence of diffractive interactions at HERA. European Physical Journal C, 25(2), 169 -187. (doi:10.1007/s10052-002-1003-1)

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Abstract

Diffractive dissociation of virtual photons, gamma*p → Xp, has beer, studied ill ep interactions with the ZEUS detector at HERA. The data cover photon virtualities 0.17 lt Q(2) lt 0.70 GeV and 3 lt Q(2) lt 80 GeV2 with 3 lt M-X lt 38 GeV, where M-X is the mass of the hadronic final state. Diffractive events were selected by two methods: the first required the detection of the scattered proton in the ZEUS leading proton spectrometer (LPS); the second was based on the distribution of M-X. The integrated luminosities of the low- and high-Q(2) samples used in the LPS-based analysis are similar or equal to 0.9 pb(-1) and similar or equal to 3.3 pb(-1), respectively. The sample used for the M-X-based analysis corresponds to an integrated luminosity of similar or equal to 6.2 pb(-1). The dependence of the diffractive cross section on W, the virtual photon-proton centre-of-mass energy. and on Q(2) is studied. In the low-Q(2) range, the energy dependence is compatible with Regge theory and is used to determine the intercept of the Pomeron trajectory. The W dependence of the diffractive cross section exhibits no significant change from the low-Q(2) to the high- Q(2) region. In the low-Q range, little Q(2) dependence is found, a significantly different behaviour from the rapidly falling cross section measured for Q(2) gt 3 GeV2. The ratio of the diffractive to the virtual photon-proton total cross sect ion is studied as a function of W and Q(2). Comparisons are made with a model based oil perturbative QCD.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Saxon, Professor David and Collins-Tooth, Dr Christopher and Bussey, Dr Peter and Doyle, Professor Anthony and Skillicorn, Professor Ian
Authors: Chekanov, S., Krakauer, D., Magill, S., Musgrave, B., Pellegrino, A., Repond, J., Yoshida, R., Mattingly, M.C.K., Antonioli, P., Anzivino, G., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Romeo, G.C., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., de Pasquale, S., Giusti, P., Iacobucci, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Pesci, A., Sartorelli, G., Garcia, Y.Z., Zichichi, A., Aghuzumtsyan, G., Bartsch, D., Brock, I., Crittenden, J., Goers, S., Hartmann, H., Hilger, E., Irrgang, P., Jakob, H.P., Kappes, A., Katz, U.F., Kerger, R., Kind, O., Paul, E., Rautenberg, J., Renner, R., Schnurbusch, H., Stifutkin, A., Tandler, J., Voss, K.C., Weber, A., Bailey, D.S., Brook, N.H., Cole, J.E., Foster, B., Heath, G.P., Heath, H.F., Robins, S., Rodrigues, E., Scott, J., Tapper, R.J., Wing, M., Ayad, R., Capua, M., Iannotti, L., Mastroberardino, A., Schioppa, M., Susinno, G., Kim, J.Y., Kim, Y.K., Lee, J.H., Lim, I.T., Pac, M.Y., Caldwell, A., Helbich, M., Liu, X., Mellado, B., Paganis, S., Schmidke, W.B., Sciulli, F., Chwastowski, J., Eskreys, A., Figiel, J., Olkiewicz, K., Przybycien, M.B., Stopa, P., Zawiejski, L., Bednarek, B., Grabowska-Bold, I., Jelen, K., Kisielewska, D., Kowal, A.M., Kowal, M., Kowalski, T., Mindur, B., Przybycien, M., Rulikowska-Zarebska, E., Suszycki, L., Szuba, D., Szuba, J., Kotanski, A., Slominski, W., Bauerdick, L.A.T., Behrens, U., Borras, K., Chiochia, V., Dannheim, D., Derrick, M., Drews, G., Fourletova, J., Fox-Murphy, A., Fricke, U., Geiser, A., Goebel, F., Gottlicher, P., Gussche, O., Haas, T., Hain, W., Hartner, G.F., Hillert, S., Kotz, U., Kowalski, H., Labes, H., Lelas, D., Lohr, B., Mankel, R., Martinez, M., Moritz, M., Notz, D., Pellmann, I.A., Petrucci, M.C., Polini, A., Schneekloth, U., Selonke, F., Surrow, B., Wessoleck, H., Wichmann, R., Wolf, G., Youngman, C., Zeuner, W., Viani, A.L.D., Meyer, A., Schlenstedt, S., Barbagli, G., Gallo, E., Genta, C., Pelfer, P.G., Bamberger, A., Benen, A., Coppola, N., Markun, P., Raach, H., Wolfle, S., Bell, M., Bussey, P.J., Doyle, A.T., Glasman, C., Hanlon, S., Lee, S.W., Lupi, A., McGance, G.J., Saxon, D.H., Skillicorn, I.O., Gialas, I., Bodmann, B., Carli, T., Holm, U., Klimek, K., Lohrmann, E., Milite, M., Salehi, H., Stonjek, S., Wicks, K., Ziegler, A., Ziegler, A., Collins-Tooth, C., Foudas, C., Goncalo, R., Long, K.R., Metlica, F., Miller, D.B., Tapper, A.D., Walker, R., Cloth, P., Filges, D., Kuze, M., Nagano, K., Tokushuku, K., Yamada, S., Yamazaki, Y., Barakbaev, A.N., Boos, E.G., Pokrovskiy, N.S., Zhautykov, B.O., Lim, H., Son, D., Barreiro, F., Gonzalez, O., Labarga, L., del Peso, J., Redondo, I., Terron, J., Vazquez, M., Barbi, M., Bertolin, A., Corriveau, F., Ochs, A., Padhi, S., Stairs, D.G., St Laurent, M., Tsurugai, T., Antonov, A., Bashkirov, V., Danilov, P., Dolgoshein, B.A., Gladkov, D., Sosnovtsev, V., Suchkov, S., Dementiev, R.K., Ermolov, P.F., Golubkov, Y.A., Katkov, I.I., Khein, L.A., Korzhavina, I.A., Kuzmin, V.A., Levchenko, B.B., Lukina, O.Y., Proskuryakov, A.S., Shcheglova, L.M., Vlasov, N.N., Zotkin, S.A., Bokel, C., Engelen, J., Grijpink, S., Koffeman, E., Kooijman, P., Maddox, E., Schagen, S., Tassi, E., Tiecke, H., Tunin, N., Velthuis, J.J., Wiggers, L., de Wolf, E., Brummer, N., Bylsma, B., Durkin, L.S., Gilmore, J., Ginsburg, C.M., and Kim, C.L.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:European Physical Journal C
ISSN:1434-6044

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