Enlighten
Research publications by members of the University of Glasgow
home > services > Enlighten

The Q(2) dependence of dijet cross sections in gamma p interactions at HERA

Breitweg, J. et al. (2000) The Q(2) dependence of dijet cross sections in gamma p interactions at HERA. Physics Letters B, 479 (1-3). 37 -52. ISSN 0370-2693 (doi:10.1016/S0370-2693(00)00311-7)

[img] Audio
arxivredirect.html

7Kb

Abstract

The dependence of the photon structure on the photon virtuality, Q(2), is studied by measuring the reaction e(+) p - → e(+) + jet + jet + X at photon-proton centre-of-mass energies 134 lt W lt 223 GeV. Events have been selected in the Q(2) ranges approximate to 0 GeV2, 0.1-0.55 GeV2, and 1.5-4.5 GeV2, having two jets with transverse energy E-f(jet) gt 5.5 GeV in Ihe Final state. The dijet cross section has been measured as a Function of the fractional momentum of the photon participating in the hard process, x(gamma)(OBS). The ratio of the dijet cross section with x(gamma)(OBS) lt 0.75 to that with x(gamma)(OBS) gt 0.75 decreases as Q(2) increases. The data are compared with the predictions of NLO pQCD and leading-order Monte Carlo programs using various parton distribution functions of the photon. The measurements can be interpreted in terms of a resolved photon component that falls with Q(2) but remains present at values of Q(2) up to 4.5 GeV2. However, none of the models considered gives a good description of the data.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Saxon, Prof David and Bussey, Dr Peter and Doyle, Prof Anthony and Skillicorn, Prof Ian
Authors: Breitweg, J., Chekanov, S., Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Pellegrino, A., Repond, J., Stanek, R., Yoshida, R., Mattingly, M.C.K., Abbiendi, G., Anselmo, F., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Romeo, G.C., Castellini, G., Cifarelli, L., Cindolo, F., Contin, A., Coppola, N., Corradi, M., de Pasquale, S., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Pesci, A., Polini, A., Sartorelli, G., Garcia, Y.Z., Zichichi, A., Amelung, C., Bornheim, A., Brock, I., Coboken, K., Crittenden, J., Deffner, R., Hartmann, H., Heinloth, K., Hilger, E., Irrgang, P., Jakob, H.P., Kappes, A., Katz, U.F., Kerger, R., Paul, E., Schnurbusch, H., Stifutkin, A., Tandler, J., Voss, K.C., Weber, A., Wieber, H., Bailey, D.S., Barret, O., Brook, N.H., Foster, B., Heath, G.P., Heath, H.F., McFall, J.D., Piccioni, D., Rodrigues, E., Scott, J., Tapper, R.J., Capua, M., Mastroberardino, A., Schioppa, M., Susinno, G., Jeoung, H.Y., Kim, J.Y., Lee, J.H., Lim, I.T., Ma, K.J., Pac, M.Y., Caldwell, A., Liu, W., Liu, X., Mellado, B., Paganis, S., Sacchi, R., Sampson, S., Sciulli, F., Chwastowski, J., Eskreys, A., Figiel, J., Klimek, K., Olkiewicz, K., Piotrzkowski, K., Przybycien, M.B., Stopa, P., Zawiejski, L., Adamczyk, L., Bednarek, B., Jelen, K., Kisielewska, D., Kowal, A.M., Kowalski, T., Przybycien, M., Rulikowska-Zarebska, E., Suszycki, L., Szuba, D., Kotanski, A., Bauerdick, L.A.T., Behrens, U., Bienlein, J.K., Burgard, C., Desler, K., Drews, G., Fox-Murphy, A., Fricke, U., Goebel, F., Gottlicher, P., Graciani, R., Haas, T., Hain, W., Hartner, G.F., Hasell, D., Hebbel, K., Johnson, K.F., Kasemann, M., Koch, W., Kotz, U., Kowalski, H., Lindemann, L., Lohr, B., Martinez, M., Milite, M., Monteiro, T., Moritz, M., Notz, D., Pelucchi, F., Petrucci, M.C., Rohde, M., Saull, P.R.B., Savin, A.A., Schneekloth, U., Selonke, F., Sievers, M., Stonjek, S., Tassi, E., Wolf, G., Wollmer, U., Youngman, C., Zeuner, W., Coldewey, C., Grabosch, H.J., Viani, A.L.D., Meyer, A., Schlenstedt, S., Straub, P.B., Barbagli, G., Gallo, E., Pelfer, P., Maccarrone, G., Votano, L., Bamberger, A., Benen, A., Eisenhardt, S., Markun, P., Raach, P., Wolfle, S., Bussey, P.J., Doyle, A.T., Lee, S.W., Macdonald, N., McCance, G.J., Saxon, D.H., Sinclair, L.E., Skillicorn, I.O., Waugh, R., Bohnet, I., Gendner, N., Holm, U., Meyer-Larsen, A., Salehi, H., Wick, K., Dannheim, D., Garfagnini, A., Gialas, I., Gladilin, L.K., Kcira, D., Klanner, R., Lohrmann, E., Poelz, G., Zetsche, F., Goncalo, R., Long, K.R., Miller, D.B., Tapper, A.D., Walker, R., Mallik, U., Cloth, P., Filges, D., Ishii, T., Kuze, M., Nagano, K., Tokushuku, K., Yamada, S., Yamazaki, Y., Ahn, S.H., An, S.H., Hong, S.J., Lee, S.B., Nam, S.W., Park, S.K., Lim, H., Park, I.H., Son, D., Barreiro, F., Garcia, G., Glasman, C., Gonzalez, O., Labarga, L., del Peso, J., Redondo, I., Terron, J., Barbi, M., Corriveau, F., Hanna, D.S., Ochs, A., Padhi, S., Riveline, M., Stairs, D.G., Wing, M., Tsurugai, T., Bashkirov, V., Dolgoshein, B.A., Dementiev, R.K., Ermolov, P.F., Golubkov, Y.A., Katkov, I.I., Khein, L.A., Korotkova, N.A., Korzhavina, I.A., Kuzmin, V.A., Lukina, O.Y., Proskuryakov, A.S., Shcheglova, L.M., Solomin, A.N., Vlasov, N.N., Zotkin, S.A., Bokel, C., Botje, M., Brummer, N., Engelen, J., and Grijpink, S.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physics Letters B
Publisher:Elsevier BV
ISSN:0370-2693
ISSN (Online):1873-2445

University Staff: Request a correction | Enlighten Editors: Update this record

Downloads per month over past year

View more statistics