Measurement of open beauty production in photoproduction at HERA

Breitweg, J. et al. (2001) Measurement of open beauty production in photoproduction at HERA. European Physical Journal C, 18(4), 625 -637. (doi: 10.1007/s100520100571)

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Abstract

The production and semi-leptonic decay of heavy quarks have been studied in the photoproduction process e/sup +/p to e/sup +/+dijet+e/sup -/+X with the ZEUS detector at HERA using an integrated luminosity of 38.5 pb/sup -1/. Events with photon-proton centre-of-mass energies, W/sub gamma p/, between 134 and 269 GeV and a photon virtuality, Q/sup 2/, less than 1 GeV/sup 2/ were selected requiring at least two jets of transverse energy E/sub T//sup jet1(2)/ gt 7(6) GeV and an electron in the final state. The electrons were identified by employing the ionisation energy loss measurement. The contribution of beauty quarks was determined using the transverse momentum of the electron relative to the axis of the closest jet, p/sub T//sup rol/. The data, after background subtraction, were fit with a Monte Carlo simulation including beauty and charm decays. The measured beauty cross section was extrapolated to the parton level with the b quark restricted to the region of transverse momentum p/sub T//sup b/ gt p/sub T//sup min/=5 GeV and pseudorapidity | eta /sup b/| lt 2. The extrapolated cross section is 1.6+or-0.4 (stat.)/sub -0.5//sup +0.3/(syst.)/sub -0.4//sup +0.2/(ext.) nb. The result is compared to a perturbative QCD calculation performed to next-to-leading order.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Skillicorn, Professor Ian and Doyle, Professor Anthony and Saxon, Professor David and Bussey, Dr Peter
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., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Bruni, A., Bruni, G., Cara Romeo, G., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., de Pasquale, S., Giusti, P., Iacobucci, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Pesci, A., Sartorelli, G., Zichichi, A., Aghuzumtsyan, G., Amelung, C., Brock, I., Coboken, K., Goers, S., Hartmann, H., Heinloth, K., Hilger, E., Irrgang, P., Jakob, H.P., Kappes, A., Katz, U.F., Kerger, R., Kind, O., Paul, E., Rauterberg, J., Schnurbusch, H., Stifutkin, A., Tandler, J., Voss, K.C., Weber, A., Wieber, H., Bailey, D.S., Barret, O., Brook, N.H., Cole, J.E., Foster, B., Heath, G.P., Heath, H.F., Robins, S., 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., Cadwell, A., Liu, W., Liu, X., Mellado, B., Paganis, S., Sampson, S., Schmidke, W.B., Sciulli, F., Chwastowski, J., Eskreys, A., Figiel, J., Klimek, K., Olkiewicz, K., Piotrzkowski, K., Przybycien, M.B., Stopa, P., Zawiejski, L., Bednarek, B., Jelen, K., Kisielewska, D., Kowal, A.M., Kowalski, T., Przybcien, M., Rulikowska-Zarebska, E., Suszycki, L., Szuba, D., Kotanski, A., Bauerdick, L.A.T., Behrens, U., Bienlein, J.K., Borras, K., Chiochia, V., Crittenden, J., Dannheim, D., Desler, K., Drews, G., Fox-Murphy, A., Fricke, U., Goebel, F., Gottlicher, P., Graciani, R., Haas, T., Hain, W., Hartner, G.F., Hebbel, K., Hillert, S., Koch, W., Kotz, U., Kowalski, H., Labes, H., Lohr, B., Mankel, R., Martens, J., Martinez, M., Milite, M., Mortiz, M., Notz, D., Petrucci, M.C., Polini, A., Rohde, M., Savin, A.A., Schneekloth, U., Selonke, F., Sievers, M., Stonjek, S., Wolf, G., Wollmer, U., Youngman, C., Zeuner, W., Coldewey, C., Lopez-Duran Viani, A., Meyer, A., Schlenstedt, S., Straub, P.B., Barbagli, E., Gallo, E., Parent, A., Pelfer, P.G., Bamberger, A., Benen, A., Coppola, N., Eisenhardt, S., Markun, P., Raach, H., Wolfle, S., Bussey, P.J., Bell, M., Doyle, A.T., Glasman, C., Lee, S.W., Lupi, A., Macdonald, N., McCance, G.J., Saxon, D.H., Sinclair, L.E., Skillicorn, I.O., Waugh, R., Bodmann, B., Gendner, N., Holm, U., Salehi, H., Wick, K., Yildirim, A., Carli, T., Garfagnini, A., Geiser, A., Gialas, I., Kcira, D., Klanner, R., Lohrmann, E., Goncalo, R., Long, K.R., Miller, D.B., Tapper, A.D., Walker, R., Cloth, P., Filges, D., Ishii, T., Kuze, M., Nagano, K., Tokushuku, K., Yamada, S., Yamazaki, Y., Barakbaev, A.N., Boos, E.G., Pokrovskiy, N.S., Zhautykov, B.O., Ahn, S., Lee, S.B., Park, S.K., Lim, H., Son, D., Barreiro, F., Garcia, G., Gonzalez, O., Labarga, L., del Peso, J., Redondo, I., Terron, J., Vasquez, M., Barbi, M., Corriveau, F., Padhi, S., Stairs, D.G., Wing, M., Tsurugai, T., Antonov, A., Bashkirov, V., Danilov, M., Dolgoshein, B.A., Gladkov, D., Sosnovtsev, V., Suchkov, S., Dementiev, R.K., Ermolov, P.F., Golubkov, Y., Katkov, I.I., Khein, L.A., Korotkova, N.A., Korzhavina, I.A., Kuzmin, V.A., Lukina, O.Y., Proskuryakov, A.S., Schleglova, L.M., Solomin, A.N., Vlasov, N.N., Zotkin, S.A., Bokel, C., Botje, M., Brummer, N., Engelen, J., Grijpink, S., Koffeman, E., Kooijman, P., Schagen, S., Sighem, A.v., Tassi, E., Tiecke, H., and Tuning, N.
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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