Search for QCD-instanton induced events in deep inelastic ep scattering at HERA

Chekanov, S. et al. (2004) Search for QCD-instanton induced events in deep inelastic ep scattering at HERA. European Physical Journal C, 34(3), pp. 255-265. (doi: 10.1140/epjc/s2004-01735-3)

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Abstract

A search for QCD-instanton-induced events in deep inelastic ep scattering has been performed with the ZEUS detector at the HERA collider, using data corresponding to an integrated luminosity of 38 pb(-1). A kinematic range defined by cuts on the photon virtuality, Q(2) gt 120 GeV2, and on the Bjorken scaling variable, x gt 10(-3), has been investigated. The QCD- instanton induced events were modelled by the Monte Carlo generator QCDINS. A background-independent, conservative 95% confidence level upper limit for the instanton cross section of 26 pb is obtained, to be compared with the theoretically expected value of 8.9 pb.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ferrando, Dr James and Doyle, Professor Anthony and Saxon, Professor David and Bussey, Dr Peter
Authors: Chekanov, S., Derrick, M., Krakauer, D., Loizides, J.H., Magill, S., Miglioranzi, S., Musgrave, B., Repond, J., Yoshida, R., Mattingly, M.C.K., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Romeo, G.C., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., De Pasquale, S., Giusti, P., Iacobucci, G., Margotti, A., Montanari, A., Nania, R., Palmonari, F., Pesci, A., Sartorelli, G., Zichichi, A., Aghuzumtsyan, G., Bartsch, D., Brock, I., Goers, S., Hartmann, H., Hilger, E., Irrgang, P., Jakob, H.P., Kind, O., Meyer, U., Paul, E., Rautenberg, J., Renner, R., Stifutkin, A., Tandler, J., Voss, K.C., Wang, M., Weber, A., Bailey, D.S., Brook, N.H., Cole, J.E., Heath, G.P., Namsoo, T., Robins, S., Wing, M., Capua, M., 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., Ning, Y., Paganis, S., Ren, Z., Schmidke, W.B., Sciulli, F., Chwastowski, J., Eskreys, A., Figiel, J., Galas, A., Olkiewicz, K., Stopa, P., Zawiejski, L., Adamczyk, L., Bold, T., Grabowska-Bold, I., Kisielewska, D., Kowal, A.M., Kowal, M., Kowalski, T., Przybycien, M., Suszycki, L., Szuba, D., Szuba, J., Kotanski, A., Slominski, W., Adler, V., Behrens, U., Bloch, I., Borras, K., Chiochia, V., Dannheim, D., Drews, G., Fourletova, J., Fricke, U., Geiser, A., Gottlicher, P., Gutsche, O., Haas, T., Hain, W., Hillert, S., Kahle, B., Kotz, U., Kowalski, H., Kramberger, G., Labes, H., Lelas, D., Lim, H., Lohr, B., Mankel, R., Melzer-Pellmann, I.A., Nguyen, C.N., Notz, D., Nuncio-Quiroz, A.E., Polini, A., Raval, A., Rurua, L., Schneekloth, U., Stoesslein, U., Wolf, G., Youngman, C., Zeuner, W., Schlenstedt, S., Barbagli, G., Gallo, E., Genta, C., Pelfer, P.G., Bamberger, A., Benen, A., Karstens, F., Dobur, D., Vlasov, N.N., Bell, M., Bussey, P.J., Doyle, A.T., Ferrando, J., Hamilton, J., Hanlon, S., Saxon, D.H., Skillicorn, I.O., Gialas, I., Bodmann, B., Carli, T., Holm, U., Klimek, K., Krumnack, N., Lohrmann, E., Milite, M., Salehi, H., Schleper, P., Stonjek, S., Wick, K., Ziegler, A., Ziegler, A., Collins-Tooth, C., Foudas, C., Goncalo, R., Long, K.R., Tapper, A.D., Cloth, P., Filges, D., Kataoka, M., Nagano, K., Tokushuku, K., Yamada, S., Yamazaki, Y., Barakbaev, A.N., Boos, E.G., Pokrovskiy, N.S., Zhautykov, B.O., Son, D., Piotrzkowski, K., Barreiro, F., Glasman, C., Gonzalez, O., Labarga, L., del Peso, J., Tassi, E., Terron, J., Vazquez, M., Zambrana, M., Barbi, M., Corriveau, F., Gliga, S., Lainesse, J., Padhi, S., Stairs, D.G., Walsh, R., Tsurugai, T., Antonov, A., 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., Zotkin, S.A., Coppola, N., Grijpink, S., Koffeman, E., Kooijman, P., Maddox, E., Pellegrino, A., Schagen, S., Tiecke, H., Velthuis, J.J., Wiggers, L., de Wolf, E., Brummer, N., Bylsma, B., Durkin, L.S., Ling, T.Y., Cooper-Sarkar, A.M., Cottrell, A., Devenish, R.C.E., Foster, B., Grzelak, G., Gwenlan, C., Patel, S., Straub, P.B., Walczak, R., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., Dusini, S., Garfagnini, A., Limentani, S., Longhin, A., Parenti, A., Posocco, M., Stanco, L., Turcato, M., Heaphy, E.A., Metlica, F., and Oh, B.Y.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:European Physical Journal C
Publisher:Springer
ISSN:1434-6044
ISSN (Online):1434-6052

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