Author: "SCHNEEKLOTH, U" / Database: Supplemental Index - Searchworks@Jio Institute Digital Library Search Results

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51 results on '"SCHNEEKLOTH, U"'

1. Three-jet production in diffractive deep inelastic scattering at HERA

Author: Chekanov, S., Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Pellegrino, A., Repond, J., Yoshida, R., Mattingly, M.C.K., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., 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., Brock, I., Goers, S., Hartmann, H., Hilger, E., Irrgang, P., Jakob, H.-P., Kappes, A., Katz, U.F., Kerger, R., Kind, O., Paul, E., Rautenberg, J., Schnurbusch, H., Stifutkin, A., Tandler, J., Voss, K.C., Weber, A., Wieber, H., 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., 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., Helbich, M., 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., Przybycień, M.B., Stopa, P., Zawiejski, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowal, A.M., Kowal, M., Kowalski, T., Mindur, B., Przybycień, M., Rulikowska-Zarȩbska, E., Suszycki, L., Szuba, D., Kotański, A., Bauerdick, L.A.T., Behrens, U., Borras, K., Chiochia, V., Crittenden, J., Dannheim, D., Desler, K., Drews, G., Fox-Murphy, A., Fricke, U., Geiser, A., Goebel, F., Göttlicher, P., Graciani, R., Haas, T., Hain, W., Hartner, G.F., Hebbel, K., Hillert, S., Koch, W., Kötz, U., Kowalski, H., Labes, H., Löhr, B., Mankel, R., Martens, J., Martı́nez, M., Milite, M., Moritz, M., Notz, D., Petrucci, M.C., Polini, A., Schneekloth, U., Selonke, F., Stonjek, S., Wolf, G., Wollmer, U., Whitmore, J.J., Wichmann, R., Youngman, C., Zeuner, W., Coldewey, C., Lopez-Duran Viani, A., Meyer, A., Schlenstedt, S., Barbagli, G., Gallo, E., Pelfer, P.G., Bamberger, A., Benen, A., Coppola, N., Markun, P., Raach, H., Wölfle, S., Bell, M., Bussey, P.J., Doyle, A.T., Glasman, C., Lee, S.W., Lupi, A., McCance, G.J., Saxon, D.H., Skillicorn, I.O., Bodmann, B., Gendner, N., Holm, U., Salehi, H., Wick, K., Yildirim, A., Ziegler, A., Carli, T., Garfagnini, A., Gialas, I., Lohrmann, E., Foudas, C., Gonçalo, 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., Ahn, S.H., Lee, S.B., Park, S.K., Lim, H., Son, D., Barreiro, F., Garcı́a, G., González, O., Labarga, L., del Peso, J., Redondo, I., Terrón, J., Vázquez, M., Barbi, M., Bertolin, A., Corriveau, F., Ochs, A., Padhi, S., Stairs, D.G., Tsurugai, T., Antonov, A., Bashkirov, V., Danilov, P., Dolgoshein, B.A., Gladkov, D., Sosnovtsev, V., Suchkov, S., Dementiev, R.K., Ermolov, P.F., Golubkov, Yu.A., Katkov, I.I., Khein, L.A., Korotkova, N.A., Korzhavina, I.A., Kuzmin, V.A., Levchenko, B.B., Lukina, O.Yu., Proskuryakov, A.S., Shcheglova, L.M., Solomin, A.N., Vlasov, N.N., Zotkin, S.A., Bokel, C., Engelen, J., Grijpink, S., Maddox, E., Koffeman, E., Kooijman, P., Schagen, S., Tassi, E., Tiecke, H., Tuning, N., Velthuis, J.J., Wiggers, L., de Wolf, E., Brümmer, N., Bylsma, B., Durkin, L.S., Gilmore, J., Ginsburg, C.M., Kim, C.L., Ling, T.Y., Boogert, S., Cooper-Sarkar, A.M., Devenish, R.C.E., Ferrando, J., Große-Knetter, J., Matsushita, T., Rigby, M., Ruske, O., Sutton, M.R., Walczak, R., Brugnera, R., Carlin, R., Dal Corso, F., Dusini, S., Limentani, S., Longhin, A., Parenti, A., Posocco, M., Stanco, L., Turcato, M., Adamczyk, L., Iannotti, L., Oh, B.Y., Saull, P.R.B., Toothacker, W.S., Iga, Y., D'Agostini, G., Marini, G., Nigro, A., Cormack, C., Hart, J.C., McCubbin, N.A., Epperson, D., Heusch, C., Sadrozinski, H.F.-W., Seiden, A., Williams, D.C., Park, I.H., Pavel, N., Abramowicz, H., Dagan, S., Gabareen, A., Kananov, S., Kreisel, A., Levy, A., Abe, T., Fusayasu, T., Kohno, T., Umemori, K., Yamashita, T., Hamatsu, R., Hirose, T., Inuzuka, M., Kitamura, S., Matsuzawa, K., Nishimura, T., Arneodo, M., Cartiglia, N., Cirio, R., Costa, M., Ferrero, M.I., Maselli, S., Monaco, V., Peroni, C., Ruspa, M., Sacchi, R., Solano, A., Staiano, A., Bailey, D.C., Fagerstroem, C.-P., Galea, R., Koop, T., Levman, G.M., Martin, J.F., Mirea, A., Sabetfakhri, A., Butterworth, J.M, Gwenlan, C., Hall-Wilton, R., Hayes, M.E., Heaphy, E.A., Jones, T.W., Lane, J.B., Lightwood, M.S., West, B.J., Ciborowski, J., Ciesielski, R., Grzelak, G., Nowak, R.J., Pawlak, J.M., Smalska, B., Tymieniecka, T., Ukleja, J., Zakrzewski, J.A., Żarnecki, A.F., Adamus, M., Plucinski, P., Sztuk, J., Deppe, O., Eisenberg, Y., Gladilin, L.K., Hochman, D., Karshon, U., Breitweg, J., Chapin, D., Cross, R., Kçira, D., Lammers, S., Reeder, D.D., Savin, A.A., Smith, W.H., Deshpande, A., Dhawan, S., Hughes, V.W., Straub, P.B., Bhadra, S., Catterall, C.D., Frisken, W.R., Khakzad, M., and Menary, S.
Abstract: Three-jet production in the reaction ep→eXphas been studied with the ZEUS detector at HERA using an integrated luminosity of 42.74 pb−1.The data were measured in the kinematic region 5
Published: 2001
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2. Measurement of the diffractive structure function in deep inelastic scattering at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Geitz, G., Grothe, M., Hartmann, H., Heinloth, H., Hilger, E., Jakob, H. -P., Katz, U. F., Mari, S. M., Mass, A., Mengel, S., Mollen, J., Paul, E., Rembser, Ch., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, H. F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O'Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarębska, E., Suszycki, L., Zając, J., Kotański, A., Przybycień, M., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D. J., Glasman, C., Göttlicher, P., Große-Knetter, J., Gutjahr, B., Haas, T., Hain, W., Hasell, D., Heßling, H., Iga, Y., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voß, T., Westphal, D., Wolf, G., Youngman, C., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mattingly, M. C. K., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Söldner-Rembold, S., Schroeder, J., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Fleck, J. I., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. Y. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Zhang, Y., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Fernandez, J. P., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Trocóniz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., St.Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Yu. A., Kobrin, V. D., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J. D., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Hubbard, B., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Bandyopadhyay, D., Benard, F., Brkic, M., Crombie, M. B., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. -P., Frisken, W. R., Furutani, K. M., Khakzad, M., and Schmidke, W. B.
Abstract: This paper presents an analysis of the inclusive properties of diffractive deep inelastic scattering events produced inep interactions at HERA. The events are characterised by a rapidity gap between the outgoing proton system and the remaining hadronic system. Inclusive distributions are presented and compared with Monte Carlo models for diffractive processes. The data are consistent with models where the pomeron structure function has a hard and a soft contribution. The diffractive structure function is measured as a function ofxP, the momentum fraction lost by the proton, of ß, the momentum fraction of the struck quark with respect toxP, and ofQ2 in the range 6.3·10-4P <10-2, 0.1<ß<0.8 and 82<100 GeV2. The dependence is consistent with the formxP wherea=1.30±0.08(stat)-0.14+0.08(sys) in all bins of ß andQ2. In the measuredQ2 range, the diffractive structure function approximately scales withQ2 at fixed ß. In an Ingelman-Schlein type model, where commonly used pomeron flux factor normalisations are assumed, it is found that the quarks within the pomeron do not saturate the momentum sum rule.
Published: 1995
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3. Measurement of total and partial photon proton cross sections at 180 GeV center of mass energy

Author: Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Repond, J., Schlereth, J., Stanek, R., Talaga, R. L., Thron, J., Arzarello, F., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Romeo, G. Cara, Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Ciralli, F., Contin, A., D'Auria, S., Del Papa, C., Frasconi, F., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Maccarrone, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Feld, L., Frey, A., Geerts, M., Geitz, G., Hartmann, H., Haun, D., Heinloth, K., Hilger, E., Jakob, H. -P., Katz, U. F., Kramarczyk, S., Mass, A., Mengel, S., Mollen, J., Paul, E., Rembser, Ch., Schattevoy, R., Schneider, J. -L., Schramm, D., Wedemeyer, R., Cassidy, A., Cussans, D. G., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, H. F., Lancaster, M., Llewellyn, T. J., Morgado, C. J. S., O'Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Gialas, I., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Eskreys, K., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarębska, E., Suszycki, L., Zaj⇓c, J., Kędzierski, T., Kotański, A., Przybycień, M., Bauerdick, L. A. T., Behrens, U., Bienlein, J. K., Böttcher, S., Coldewey, C., Drews, G., Flasiński, M., Fleck, I., Gilkinson, D. J., Göttlicher, P., Gutjahr, B., Haas, T., Hagge, L., Hain, W., Hasell, D., Heßling, H., Hultschig, H., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Kröger, W., Krüger, J., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Rohde, M., Roldán, J., Schneekloth, U., Schroeder, J., Schulz, W., Selonke, F., Stiliaris, E., Tsurugai, T., Vogel, W., Westphal, D., Wolf, G., Youngman, C., Grabosch, H. J., Leich, A., Meyer, A., Rethfeldt, C., Schlenstedt, S., Barbagli, G., Nuti, M., Pelfer, P., Anzivino, G., De Pasquale, S., Qian, S., Votano, L., Bamberger, A., Freidhof, A., Poser, T., Söldner-Rembold, S., Theisen, G., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Forbes, J. R., Jamieson, V. A., Raine, C., Saxon, D. H., Stavrianakou, M., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Kammerlocher, H., Krebs, B., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Fürtjes, A., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Terron, J., Zetsche, F., Bacon, T. C., Beuselinck, R., Butterworth, I., Gallo, E., Harris, V. L., Long, K. R., Miller, D. B., Prinias, A., Sedgbeer, J. K., Vorvolakos, A., Whitfield, A., Bienz, T., Kreutzmann, H., Mallik, U., McCliment, E., Roco, M., Wang, M. Z., Cloth, P., Filges, D., An, S. H., Hong, S. M., Kim, C. O., Kim, T. Y., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., del Peso, J., Puga, J., de Trocóniz, J. F., Ikraiam, F., Mayer, J. K., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Mitchell, J. W., Patel, P. M., Sinclair, L. E., Stairs, D. G., Laurent, M. St., Ullmann, R., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Y. A., Kobrin, V. D., Kuzmin, V. A., Kuznetsov, E. N., Savin, A. A., Solomin, A. N., Voronin, A. G., Zotov, N. P., Bentyelsen, S., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Jong, P., de Kamps, M., Kooijman, P., Kruse, A., O'Dell, V., Tenner, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D., Blair, G. A., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Harnew, N., Khatri, T., Luffman, P., Nash, J., Roocroft, N. C., Uijterwaal, H., Walczak, R., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Gasparini, F., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D'Agostini, G., Guida, M., Iori, M., Mari, S. M., Marini, G., Mattioli, M., Nigro, A., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Cartiglia, N., Heusch, C., Van Hook, M., Hubbard, B., Lockman, W., Sadrozinski, H. F. -W., Seiden, A., Zer-Zion, D., Biltzinger, J., Seifert, R. J., Walenta, A. H., Zech, G., Abramowicz, H., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nagira, T., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nagayama, S., Nakamitsu, Y., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bandyopadhyay, D., Benard, F., Bhadra, S., Brkic, M., Crombie, M. B., Gingrich, D. M., Hartner, G. F., Levman, G. M., Martin, J. F., Orr, R. S., Sampson, C. R., Teuscher, R. J., Bullock, F. W., Catterall, C. D., Giddings, J. C., Jones, T. W., Khan, A. M., Lane, J. B., Makkar, P. L., Shaw, D., Shulman, J., Blankenship, K., Kochocki, J., Lu, B., Mo, L. W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Glasman, C., Karshon, U., Revel, D., Shapira, A., Ali, I., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Frisken, W. R., Furutani, K. M., and Iga, Y.
Abstract: Photon proton cross sections for elastic light vector meson production, sel?p, inelastic diffractive production, snd?p, non-diffractive production, sd?p, as well as the total cross section, stot?p, have been measured at an average ?p center of mass energy of 180 GeV with the ZEUS detector at HERA. The resulting values are sel?p = 18 ± 7 µb, sd?p = 33 ± 8 µb, snd?p = 91 ± 11 µb, and stot?p 143 ± 17 µb, where the errors include statistical and systematic errors added in quadrature.
Published: 1994
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4. A search for excited fermions in electron-proton collisions at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Repond, J., Schlereth, J., Stanek, R., Talaga, R. L., Thron, J., Arzarello, F., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Romeo, G. Cara, Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Ciralli, F., Contin, A., D'Auria, S., Frasconi, F., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Garcia, Y. Zamora, Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckart, M., Feld, L., Frey, A., Geerts, M., Geitz, G., Grothe, M., Hartmann, H., Haun, D., Heinloth, K., Hilger, E., Jakob, H. -P., Katz, U. F., Mari, S. M., Mass, A., Mengel, S., Mollen, J., Paul, E., Rembser, Ch., Schattevoy, R., Schneider, J. -L., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, H. F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O'Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Eskreys, K., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarebska, E., Suszycki, L., Zajac, J., Kedzierski, T., Kotański, A., Przybycień, M., Bauerdick, L. A. T., Behrens, U., Bienlein, J. K., Böttcher, S., Coldewey, C., Drews, G., Flasiński, M., Gilkinson, D. J., Göttlicher, P., Gutjahr, B., Haas, T., Hain, W., Hasell, D., Heßling, H., Hultschig, H., Iga, Y., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Kroger, W., Krüger, J., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mańczak, O., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Voß, T., Westphal, D., Wolf, G., Youngman, C., Grabosch, H. J., Leich, A., Meyer, A., Rethfeldt, C., Schlenstedt, S., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Qian, S., Votano, L., Bamberger, A., Freidhof, A., Poser, T., Söldner-Rembold, S., Schroeder, J., Theisen, G., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Fleck, I., Jamieson, V. A., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Kammerlocher, H., Krebs, B., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Fürtjes, A., Hagge, L., Lohrmann, E., Mainusch, J., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Terron, J., Zetsche, F., Bacon, T. C., Beuselinck, R., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Zhang, Y., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., del Peso, J., Puga, J., de Trocóniz, J. F., Ikraiam, F., Mayer, J. K., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., St. Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., golubkov, Y. A., Kobrin, V. D., Kuzmin, V. A., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Bentvelsen, S., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Jong, P., de Kamps, M., Kooijman, P., Kruse, A., O'Dell, V., Tenner, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Blair, G. A., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Daniels, D., Devenish, R. C. E., Harnew, N., Lancaster, M., Luffman, P. E., Lindemann, L., McFall, J., Nath, C., Quadt, A., Uijterwaal, H., Walczak, R., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D'Agostini, G., Iori, M., Marini, G., Mattioli, M., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Cartiglia, N., Dubbs, T., Heusch, C., Van Hook, M., Hubbard, B., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Biltzinger, J., Seifert, R. J., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nagira, T., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nagayama, S., Nakamitsu, Y., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Bandyopadhyay, D., Benard, F., Brkic, M., Crombie, M. B., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Kochocki, J., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprazak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Glasman, C., Karshon, U., Revel, D., Shapira, A., Ali, I., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Tsurugai, T., Bhadra, S., Frisken, W. R., and Furutani, K. M.
Abstract: A search for excited states of the standard model fermions was performed using the ZEUS detector at the HERA electron-proton collider, operating at a centre of mass energy of 296 GeV. In a sample corresponding to an integrated luminosity of 0.55 pb-1, no evidence was found for any resonant state decaying into final states composed of a fermion and a gauge boson. Limits on the coupling strength times branching ratio of excited fermions are presented for masses between 50 GeV and 250 GeV, extending previous search regions significantly.
Published: 1995
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5. Measurement of the proton structure functionF2 from the 1993 HERA data

Author: Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Repond, J., Schlereth, J., Stanek, R., Talaga, R. L., Thron, J., Arzarello, F., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Ciralli, F., Contin, A., D'Auria, S., Frasconi, F., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Feld, L., Frey, A., Geerts, M., Geitz, G., Grothe, M., Hartmann, H., Haun, D., Heinloth, K., Hilger, E., Jakob, H. -P., Katz, U. F., Mari, S. M., Mass, A., Mengel, S., Mollen, J., Paul, E., Rembser, Ch., Schattevoy, R., Schneider, J. -L., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, H. F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O'Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Gialas, I., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Eskreys, K., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarębska, E., Suszycki, L., Zając, J., Kędzierski, T., Kotański, A., Przybycień, M., Bauerdick, L. A. T., Behrens, U., Bienlein, J. K., Böttcher, S., Coldewey, C., Drews, G., Flasiński, M., Gilkinson, D. J., Göttlicher, P., Gutjahr, B., Haas, T., Hagge, L., Hain, W., Hasell, D., Heßling, H., Hultschig, H., Iga, Y., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Kröger, W., Krüger, J., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Voß, T., Westphal, D., Wolf, G., Youngman, C., Grabosch, H. J., Leich, A., Meyer, A., Rethfeldt, C., Schlenstedt, S., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Qian, S., Votano, L., Bamberger, A., Freidhof, A., Poser, T., Söldner-Rembold, S., Schroeder, J., Theisen, G., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Fleck, I., Jamieson, V. A., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Kammerlocher, H., Krebs, B., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Fürtjes, A., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Terron, J., Zetsche, F., Bacon, T. C., Beuselinck, R., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Zhang, Y., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., del Peso, J., Puga, J., de Trocóniz, J. F., Ikraiam, F., Mayer, J. K., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Mitchell, J. W., Patel, P. M., Sinclair, L. E., Stairs, D. G., St. Laurent, M., Ullmann, R., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Y. A., Kobrin, V. D., Kuzmin, V. A., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Bentvelsen, S., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Jong, P., de Kamps, M., Kooijman, P., Kruse, A., O'Dell, V., Tenner, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Blair, G. A., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Daniels, D., Devenish, R. C. E., Harnew, N., Lancaster, M., Luffman, P. E., Lindemann, L., McFall, J., Nath, C., Quadt, A., Uijterwaal, H., Walczak, R., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Gasparini, F., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D'Agostini, G., Iori, M., Marini, G., Mattioli, M., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Cartiglia, N., Dubbs, T., Heusch, C., Van Hook, M., Hubbard, B., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Biltzinger, J., Seifert, R. J., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nagira, T., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nagayama, S., Nakamitsu, Y., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bandyopadhyay, D., Benard, F., Brkic, M., Crombie, M. B., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Kochocki, J., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Glasman, C., Karshon, U., Revel, D., Shapira, A., Ali, I., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Tsurugai, T., Bhadra, S., Frisken, W. R., and Furutani, K. M.
Abstract: The ZEUS detector has been used to measure the proton structure functionF2. During 1993 HERA collided 26.7 GeV electrons on 820 GeV protons. The data sample corresponds to an integrated luminosity of 0.54 pb-1, representing a twenty fold increase in statistics compared to that of 1992. Results are presented for 72<104 GeV2 andx values as low as 3×10-4. The rapid rise inF2 asx decreases observed previously is now studied in greater detail and persists forQ2 values up to 500 GeV2.
Published: 1995
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6. Measurement and analysis of the reactionγγ→3π+3π-

Author: Pust, R., Olsson, J., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Komamiya, S., Krehbiel, H., v. Krogh, J., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Murphy, P. G., Naroska, B., Nye, J. M., Ould-Saada, F., Pitzl, D., Ramcke, R., Rieseberg, H., Sato, A., Schmidt, D., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Takeshita, T., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The reactionγγ→3π+3π- has been studied usig the JADE detector at PETRA. The topological cross sectionσ(γγ→3π+3π-) was measured in the CM energy range 1.5–5.5 GeV. The production ofρ0,s was observed and the average number ofρ0,s per event measured. The contributions of the subprocessesγγ→ρ02π+2π-,γγ→ρ0ρ0π+2π- andγγ→ 3π+3π- (phase space) were studied and 95% C.L. upper limits for the cross sectionσ(γγ→ρ0ρ0π+π- determined. Finally the Bose-Einstein correlation for pairs of like signed pions was observed. A fit to a standard parametrization gave results consistent with other studies of this effect in pion systems.
Published: 1991
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7. Measurement of resonance production in the reactionsγγ →π0π0 andγγ →π0η

Author: Oest, T., Olsson, J., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Komamiya, S., Krehbiel, H., v. Krogh, J., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Murphy, P. G., Naroska, B., Nye, J. M., Ould-Saada, F., Pitzl, D., Ramcke, R., Rieseberg, H., Sato, A., Schmidt, D., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Takeshita, T., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: Resonance production in the γγ reactionse+e−→e+e+e−π0π0 ande+e−π0η has been studied with the JADE detector at PETRA. The decay widths into γγ of thef2(1270),a0(980) anda2(1320) were measured to be Kev,Γλλ(a0(980))=0.28±0.04±0.10 KeV/BR(a0(980)→π0η) andΓλλ(a2(1320))=1.01±0.14±0.22KeV. For thef0(975) andf4(2050) upper limits of the widths were obtained,Γλλ(f0(975))<0.6 KeV, andΓλλ(f4(2050))<1.1 KeV, both at the 95% C.L. Assuming that the spin 0 background under thef2(1270) is small, thef2(1270) was found to be produced exclusively in a helicity 2 state. The helicity 0 contribution is <15% at the 95% C.L. The cross section forλλ→π0π0 in the mass range 2.0–3.5 GeV/c2 was measured for the first time. Since the cross section forλλ→π+π− is a factor ∼2 larger, ππ production in this range can be interpreted as taking place via isospin 0 production.
Published: 1990
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8. A measurement of the weak axial couplings of theb- andc-quark

Author: Elsen, E., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawamoto, T., Kleinwort, C., Knies, G., Kobayashi, T., Komamiya, S., Krehbiel, H., v. Krogh, J., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Minowa, H., Murphy, P. G., Naroska, B., Nye, J. M., Olsson, J., Ould-Saada, F., Ramcke, R., Rieseberg, H., Schmidt, D., von der Schmitt, H., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The forward-backward charge asymmetries of theb andc quarks are measured with the JADE detector at PETRA at GeV and 44 GeV using both electrons and muons to tag the heavy quarks. At GeV, a simultaneous fit for the two asymmetries yields the resultAb=-9.3±5.2% (state.) ndAc=-9.6±4.0% (stat.). The systematic errors are comparable with the statistical uncertainties. Combining the measurements at both energies and alternately constraining the weak coupling of thec andb quark to their Standard Model values (ac=1,ab=-1) increases the precision of the measurement of coupling constant of the other quark. Using this procedureab=-0.72±0.34 andac=0.79±0.40, where the numbers are corrected for and the errors include both statistical and systematic contributions. The mixing parameter for continuum is determined to be ?-0.24±0.12 if both heavy quark coupling constants are constrained to their values in the Standard Model.
Published: 1990
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9. Final results on muon and tau pair production by the JADE Collaboration at PETRA

Author: Hegner, S., Naroska, B., Schroth, F., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Komamiya, S., Krehbiel, H., v. Krogh, J., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Murphy, P. G., Nozaki, M., Nye, J. M., Olsson, J., Ould-Saada, F., Pitzl, D. D., Ramcke, R., Rieseberg, H., Schmidt, D., von der Schmitt, H., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Takeda, H., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The cross-sections and the forward-backward charge asymmetries of muon and tau pairs produced ine+e- collisions at have been measured by the JADE Collaboration. The cross-sections, and , are in agreement with the QED a3 prediction. The charge asymmetries areAµ=-(9.9±1.5±0.5)% andAt=-(8.1±2.0±0.6)% in agreement with the value -9.2% predicted by the standard model, usingMZ=91.0 GeV and sin2?W=0.230.
Published: 1990
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10. Observation of spin 1 resonance formation in the final stateKKπ produced in tagged two-photon collisions

Author: Hill, P., Olsson, J., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Howarth, C., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Komamiya, S., Krehbiel, H., v. Krogh, J., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Miller, D., Murphy, P. G., Naroska, B., Nye, J. M., Ould-Saada, F., Ramcke, R., Rieseberg, H., Schmidt, D., v. d. Schmidt, H., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Takeshita, T., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: Resonance formation has been observed in tagged two photon collisions. Since there is no corresponding signal in the untagged data these resonances have been interpreted as havingJ=1. Assigning the signal at a mass of ~1.4 GeV/c2 to thef1(1420), the product of the branching fraction and the two-photon width has been determined to be $$B(f_1 (1420) \to K\bar K\pi ) \cdot \tilde \Gamma _{f_1 (1420)} = 2.3_{ - 0.9}^{ + 1.0} \pm 0.8keV.$$
Published: 1989
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11. A measurement of the charge asymmetry of hadronic events in electron positron annihilation

Author: Greenshaw, T., Warming, P., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Komamiya, S., Krehbiel, H., Krogh, J. v., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Minowa, H., Murphy, P. G., Naroska, B., Nye, J. M., Olsson, J., Ould-Saada, F., Ramcke, R., Rieseberg, H., Schmidt, D., Schmidt, H. v. d., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Takeda, H., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The quark charge asymmetry, summed over flavours, has been measured at centre of mass energies of 35 GeV and 44 GeV using the JADE detector sited on the electron-positron storage ring PETRA. The asymmetry is found to be consistent with the expectations of the standard model at both energies and enables a measurement of the product of the axial-vector coupling constant of the electron with the axial-vector coupling constants of the quarks, assuming the moduli of these latter to be flavour independent. This gives, with reasonable assumptions concerning the effects of mixing,aeaq=-1.09±0.18±0.23 where the first error is statistical and the second systematic.
Published: 1989
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12. A measurement of the τ lepton lifetime

Author: Kleinwort, C., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Knies, G., Komamiya, S., Krehbiel, H., Krogh, J. v., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Mashimo, T., Meinke, R., Middleton, R. P., Murphy, P. G., Naroska, B., Nye, J. M., Olsson, J., Ould-Saada, F., Ramcke, R., Rieseberg, H., Schmidt, D., Schmidt, H. v. d., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Takeda, H., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The lifetime of the t lepton was measured using two different techniques. From the impact parameter distribution of 3132 one prong decays tt = (289±33±26) fs was obtained and from the decay length distribution of 648 three prong decays tt = (309-34+35±11) fs. These results were combined to give a final value of tt = (301±29) fs.
Published: 1989
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13. Lepton pair production in double tagged two-photon interactions

Author: Bartel, W., Becker, L., Cords, D., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Steffen, P., Dietrich, G., Hagemann, J., Heinzelmann, G., Kado, H., Kawagoe, K., Kleinwort, C., Kuhlen, M., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Elsen, E., Heintze, J., Hellenbrand, K. H., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Bowdery, C., Finch, A., Foster, F., Hughes, G., Nye, J., Allison, J., Ball, A. H., Barlow, R. J., Chrin, J., Duerdoth, I. P., Greenshaw, T., Hill, P., Loebinger, F. K., Macbeth, A. A., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Kawamoto, T., Kobayashi, T., Minowa, M., Takeda, H., Takeshita, T., and Yamada, S.
Abstract: Lepton pair production by two-photon processes has been studied using the JADE detector at PETRA. The study probed QED to a4 in the highestQ2 region. Both electrons and positrons were tagged by the endcap or barrel shower counters. The observed events consist of two produced leptons as well as two tagged electrons. These events show good agreement with QED to order a4.
Published: 1986
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14. Tests of the standard model in leptonic reactions at PETRA energies

Author: Bartel, W., Becker, L., Cords, D., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Steffen, P., Dietrich, G., Hagemann, J., Heinzelmann, G., Kado, H., Kawagoe, K., Kleinwort, C., Kuhlen, M., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Elsen, E., Heintze, J., Hellenbrand, K. H., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Bowdery, C., Finch, A., Foster, F., Hughes, G., Nye, J., Allison, J., Ball, A. H., Barlow, R. J., Chrin, J., Duerdoth, I. P., Greenshaw, T., Hill, P., Loebinger, F. K., Macbeth, A. A., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Kawamoto, T., Kobayashi, T., Takeda, H., Takeshita, T., and Yamada, S.
Abstract: An analysis of the three leptonic reactionse+e-?e+e-,µ+µ- andt+t- over a wide range of energy, is presented. The data were obtained with the JADE detector at thee+e- storage ring PETRA. They are compared to predictions of electroweak theories, in particular the standard model. For the total cross-sections of all three reactions and for the differential cross-section of Bhabha scattering no deviation from QED is found over the entire energy range. The differential cross-sections of µ and t pairs at high energies show the angular asymmetry predicted by electroweak interference. The axial-vector and vector weak coupling constant, sin2?W andMZ are determined and compared to other measurements. Finally, limits on deviations from the standard model are given.
Published: 1986
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15. A search for the supersymmetric chargino ine+e− annihilation at PETRA

Author: Bartel, W., Becker, L., Cords, D., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Steffen, P., Dietrich, G., Hagemann, J., Heinzelmann, G., Kado, H., Kawagoe, K., Kleinwort, C., Kuhlen, M., Meier, K., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Elsen, E., Heintze, J., Hellenbrand, K. H., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Bowdery, C. K., Finch, A. J., Foster, F., Hughes, G., Nye, J. M., Allison, J., Ball, A. H., Barlow, R. J., Chrin, J., Duerdoth, I. P., Greenshaw, T., Hill, P., Loebinger, F. K., Macbeth, A. A., McCann, H., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Kawamoto, T., Kobayashi, T., Minowa, M., Takeda, H., Takeshita, T., and Yamada, S.
Abstract: A search has been made for the chargino, the supersymmetric partner of theW± (or the partner of the charged Higgs bosons), ine+e- annihilation at PETRA using the JADE detector. The chargino decay modes investigated are and (with subsequent gluino decay ). No evidence for such events has been observed. The 95% C.L. lower limit for the chargino mass is typically 22.5 GeV, depending only slightly on the masses of other supersymmetric particles. If the chargino is stable, the lower mass limit is 21.1 GeV (95% C.L.).
Published: 1985
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16. New results one+e−→μ+μ− from the JADE detector at PETRA

Author: Bartel, W., Becker, L., Bowdery, C., Cords, C., Felst, R., Haidt, D., Junge, H., Knies, G., Krehbiel, H., Laurikainen, P., Meinke, R., Naroska, B., Olsson, J., Pietarinen, E., Schmidt, D., Steffen, P., Dietrich, G., Heinzelmann, G., Kado, H., Kuhlen, M., Mashimo, T., Meier, K., Petersen, A., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Heintze, J., Hellenbrand, K. H., Heuer, R. D., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Finch, A., Foster, F., Hughes, G., Nozaki, T., Nye, J., Allison, J., Baines, J., Ball, A. H., Barlow, R. J., Chrin, J., Duerdoth, I. P., Greenshaw, T., Hill, P., Loebinger, F. K., Macbeth, A. A., McCann, H., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Sechi-Zorn, B., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Whittaker, J. B., Kanzaki, J., Kawamoto, T., Kobayashi, T., Koshiba, M., Minowa, M., Nozaki, M., Orito, S., Sato, A., Takeda, H., Takeshita, T., Totsuka, Y., and Yamada, S.
Abstract: The production of collinear muon pairs has been studied using the JADE detector at thee+e− storage ring at PETRA. Results for the total cross section and the angular distribution were obtained at centre of mass (cm) energies ranging from 12 to 46 GeV. The data correspond to an integrated luminosity offLdt>90 pb−1, of which 71.2 pb−1 were taken at =34.4 GeV and 17 pb−1 at =42.4 GeV. The results are compared to electroweak theories, in particular the “Standard Model”.
Published: 1985
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17. Charged particle and neutral kaon production ine+e− annihilation at PETRA

Author: Bartel, W., Becker, L., Bowdery, C., Cords, D., Eichler, R., Felst, R., Haidt, D., Krehbiel, H., Naroska, B., Olsson, J., Steffen, P., Warming, P., Dietrich, G., Elsen, E., Heinzelmann, G., Kado, H., Meier, K., Petersen, A., Schneekloth, U., Weber, G., Bethke, S., Dieckmann, A., Heintze, J., Hellenbrand, K. H., Heuer, R. D., Kawabata, S., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Wagner, A., Finch, A., Foster, F., Hughes, G., Nozaki, T., Wriedt, H., Allison, J., Ball, A. H., Bamford, G., Barlow, R., Duerdoth, I. P., Glendinning, I., Loebinger, F. K., Macbeth, A. A., McCann, H., Mills, H. E., Murphy, P. G., Rowe, P., Stephens, K., Clarke, D., Marshall, R., Pearce, G. F., Whittaker, J. B., Kanzaki, J., Kobayashi, T., Koshiba, M., Minowa, M., Nozaki, M., Odaka, S., Orito, S., Sato, A., Takeda, H., Totsuka, Y., Watanabe, Y., Yamada, S., and Yanagisawa, C.
Abstract: The mean charged multiplicity as well as its distribution has been measured as a function of c.m. energy in the reactione+e-?hadrons. Fragmentation models are compared with the data. After applying radiative corrections the mean charged multiplicity is measured to be 8.4±0.3±0.6 at 12 GeV, 13.1±0.3±0.6 at 30 GeV and 13.6±0.3±0.6 at 35 GeV. The ratio of mean charged multiplicity to the dispersion (ch>/Dch) is almost constant in the energy range studied, indicating KNO scaling of the charged multiplicity. The inclusive differential cross sections(ds/dxp) shows scaling violation in the highxp region (xp>0.15). The absolute value of the scaling violation is consistent with the result of 2nd order QCD calculations. The production of neutral kaons has been investigated by identifying the decayKS0?p+p-. The production probability for a strange quark relative to that of au ord quark in the fragmentation, ?s, has been determined to be 0.27±0.03±0.05 averaged over c.m. energies from 12 to 35 GeV. Momentum spectra for neutral kaons are presented and are compared with model predictions.
Published: 1983
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18. Comparison of the particle flow in <img src="/fulltext-image.asp?format=htmlnonpaginated&src=P142Q0R7X70Q52V3_html\10052_2005_Article_BF01560384_TeX2GIFIE1.gif" border="0" alt=" $$q\bar q\gamma $$ " /> and <img src="/fulltext-image.asp?format=htmlnon

Author: Ould Saada, F., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Becker, L., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kawamoto, T., Kleinwort, C., Knies, G., Komamiya, S., Krehbiel, H., Krogh, J. v., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Mills, H. E., Minowa, M., Murphy, P. G., Naroska, B., Nye, J. M., Olsson, J., Petersen, A., Ramcke, R., Rieseberg, H., Schmidt, D., Schmitt, H. v. d., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Wagner, A., Walker, I. W., Warming, P., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The particle flow distributions in the event plane of 3-jet and of radiative 2-jet events are compared at a centre of mass energy of 35 GeV. The number of particles in the angular region opposite to the gluon in events is found to be significantly reduced relative to the number of particles in the region opposite to the hard photon in events. This depletion is expected from the “string effect” observed in 3-jet events. It can be explained within the framework of QCD as arising from soft gluon interference.
Published: 1988
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19. Experimental studies on multijet production ine+e− annihilation at PETRA energies

Author: Bartel, W., Becker, L., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Dietrich, G., Greenshaw, T., Hagemann, J., Heinzelmann, G., Kado, H., Kleinwort, C., Kuhlen, M., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Elsen, E., Heintze, J., Hellenbrand, K. -H., Komamiya, S., von Krogh, J., Rieseberg, H., v. d. Schmitt, H., Smolik, L., Spitzer, J., Wagner, A., Zimmer, M., Bowdery, C. K., Finch, A. J., Foster, F., Hughes, G., Nye, J. M., Allison, J., Barlow, R. J., Chrin, J., Duerdoth, I. P., Loebinger, F. K., Macbeth, A. A., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Hill, P., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Kawagoe, K., Mashimo, T., Takeshita, T., and Yamada, S.
Abstract: Hadronic jet production bye+e--annihilation has been studied in the energy range of 14.0–46.7 GeV. The data have been analysed in terms of a cluster algorithm and other topological quantities. The results are compared with 2nd order QCD calculations which incorporate models for the fragmentation of quarks and gluons into hadrons. At the higher energies we observe more spherical and 4-jet like events than predicted by these calculations. We cannot achieve a simultaneous description of the observed 3- and 4-jet production by adjusting the strong coupling constant as or the fragmentation parameters of the 2nd order QCD models. The observed excess of spherical events can partially be explained by the production of multi-parton events expected from higher order QCD contributions. Consequences of the presented results for the value of as, determined in previous analyses, are discussed. QCD parton shower models, including soft gluon interference, are able to describe the observed number of spherical events.
Published: 1986
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20. Hadronic energy distributions in deep-inelastic electron-proton scattering

Author: Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Repond, J., Repond, S., Stanek, R., Talaga, R. L., Thron, J., Arzarello, F., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Ciralli, F., Contin, A., D'Auria, S., Del Papa, C., Frasconi, F., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Lin, Q., Lisowski, B., Maccarrone, G., Margotti, A., Massam, T., Nania, F., Nemoz, C., Palmonari, F., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bargende, A., Crittenden, J., Dabbous, H., Desch, K., Diekmann, B., Doeker, T., Geerts, M., Geitz, G., Hartmann, H., Haun, D., Heinloth, K., Hilger, E., Jakob, H. -P., Kramarczyk, S., Kückes, M., Mass, A., Mengel, S., Mollen, J., Monaldi, D., Müsch, H., Paul, E., Schattevoy, R., Schneider, J. -L., Schramm, D., Wedemeyer, R., Cassidy, A., Cussans, D. G., Dyce, N., Foster, B., Gilmore, R., Heath, G. P., Heath, H. F., Lancaster, M., Llewellyn, T. J., Malos, J., Morgado, C. J. S., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Barillari, T., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Gialas, I., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Chwastowski, J., Dwurzźny, A., Eskreys, A., Jakubowski, Z., Niziol, B., Piotrzkowski, K., Zachara, M., Zawiejski, L., Bednarek, B., Borzemski, P., Eskreys, K., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarębska, E., Suszycki, L., Zając, J., Kędzierski, T., Kotański, A., Przybycień, M., Bauerdick, L. A. T., Behrens, U., Bienlein, J. K., Böttcher, S., Coldewey, C., Dannemann, A., Drews, G., Erhard, P., Flasiński, M., Fleck, I., Gläser, R., Göttlicher, P., Gutjahr, B., Haas, T., Hagge, L., Hain, W., Hasell, D., Hultschig, H., Jahnen, G., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Krüger, J., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Manczak, O., Momayezi, M., Ng, J. S. T., Nickel, S., Notz, D., Pösnecker, K. -U., Rohde, M., Roldán, J., Ros, E., Schneekloth, U., Schroeder, J., Schulz, W., Selonke, F., Stiliaris, E., Tscheslog, E., Tsurugai, T., Vogel, W., Wolf, G., Youngman, C., Grabosch, H. J., Leich, A., Meyer, A., Rethfeldt, C., Schlenstedt, S., Barbagli, G., Francescato, A., Nuti, M., Pelfer, P., Anzivino, G., Casaccia, R., De Pasquale, S., Qian, S., Votano, L., Bamberger, A., Freidhof, A., Kröger, W., Poser, T., Söldner-Rembold, S., Theisen, G., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Forbes, J. R., Jamieson, V. A., Raine, C., Saxon, D. H., Brückmann, H., Gloth, G., Holm, U., Kammerlocher, H., Krebs, B., Neumann, T., Wick, K., Fürtjes, A., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Terron, J., Zetsche, F., Bacon, T. C., Beuselinck, R., Butterworth, I., Gallo, E., Harris, V. L., Miller, D. B., Prinias, A., Sedgbeer, J. K., Vorvolakos, A., Whitfield, A., Bienz, T., Kreutzmann, H., Mallik, U., McCliment, E., Roco, M., Wang, M. Z., Cloth, P., Filges, D., An, S. H., Hong, S. M., Kim, C. O., Kim, T. Y., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Chen, L., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Barreiro, F., Cases, G., Hervás, L., Labarga, L., del Peso, J., de Trocóniz, J. F., Ikraiam, F., Mayer, J. K., Smith, G. R., Corriveau, F., Gilkinson, D. J., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Meijer Drees, R., Mitchell, J. W., Patel, P. M., Sinclair, L. E., Stairs, D. G., St.Laurent, M., Ullmann, R., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Y. A., Kuzmin, V. A., Kuznetsov, E. N., Savin, A. A., Voronin, A. G., Notov, N. P., Bentvelsen, S., Botje, M., Dake, A., Engelen, J., de Jong, P., de Kamps, M., Kooijman, P., Kruse, A., van der Lugt, H., O'Dell, V., Tenner, A., Tiecke, H., Uijterwaal, H., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Blair, G. A., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Gingrich, D. M., Hallam-Baker, P. M., Harnew, N., Khatri, T., Long, K. R., Luffman, P., McArthur, I., Morawitz, P., Nash, J., Smith, S. J. P., Roocroft, N. C., Wilson, F. F., Abbiendi, G., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Gasparini, F., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Butterworth, J. M., Bulmahn, J., Feild, G., Oh, B. Y., Whitmore, J., Contino, U., D'Agostini, G., Guida, M., Iori, M., Mari, S. M., Marini, G., Mattioli, M., Nigro, A., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Cartiglia, N., Heusch, C., Hubbard, B., Leslie, J., Lockman, W., O'Shaughnessy, K., Sadrozinski, H. F., Seiden, A., Zer-Zion, D., Badura, E., Biltzinger, J., Seifert, R. J., Walenta, A. H., Zech, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kasai, S., Kuze, M., Nagasawa, Y., Nakao, M., Okuno, H., Tokushuku, K., Watanabe, T., Yamada, S., Chiba, M., Hamatsu, R., Hirose, T., Kitamura, S., Nagayama, S., Nakamitsu, Y., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Bandyopadhyay, D., Benard, F., Bhadra, S., Brkic, M., Burow, B. D., Chlebana, F. S., Crombie, M. B., Hartner, G. F., Levman, G. M., Martin, J. F., Orr, R. S., Prentice, J. D., Sampson, C. R., Stairs, G. G., Teuscher, R. J., Yoon, T. -S., Bullock, F. W., Catterall, C. D., Giddings, J. C., Jones, T. W., Khan, A. M., Lane, J. B., Makkar, P. L., Shaw, D., Shulman, J., Blankenship, K., Kochocki, J., Lu, B., Mo, L. W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Stopczyński, A., Tymieniecka, T., Walczak, R., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Abramowicz, H., Eisenberg, Y., Glasman, C., Karshon, U., Montag, A., Revel, D., Shapira, A., Foudas, C., Fordham, C., Loveless, R. J., Goussiou, A., Ali, I., Behrens, B., Dasu, S., Reeder, D. D., Smith, W. H., Silverstein, S., Frisken, W. R., Furutani, K. M., and Iga, Y.
Abstract: This paper presents energy distributions of the hadronic system produced in neutral-current electron-proton deep-inelastic scattering at a centre of mass energy of 296 GeV. Comparison of the results with QCD Monte Carlo models shows that QCD radiation has a strong influence on the characteristics of the final state. The data are reasonably reproduced by the Lund model based on a matrix element calculation in first order ofas, followed by appropriate parton showers, as well as by the colour dipole model. The HERWIG parton shower model also gives a reasonable representation of the data. Neither the first order matrix elements alone nor the Lund parton shower model, without the matrix element calculation, reproduce the data.
Published: 1993
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21. A study of photon production in hadronic events frome+e− annihilation

Author: Pitzl, D., Allison, J., Ambrus, K., Barlow, R., Bartel, W., Bethke, S., Bowdery, C., Cartwright, S., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I., Eckerlin, G., Elsen, E., Felst, R., Finch, A., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Kobayashi, T., Komamiya, S., Krehbiel, H., v. Krogh, J., Kuhlen, M., Loebinger, F., Macbeth, A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R., Minowa, H., Murphy, P., Naroska, B., Nye, J., Olsson, J., Ould-Saada, F., Ramcke, R., Rieseberg, H., Schmidt, D., Smolik, L., Schneekloth, U., Skard, J., Spitzer, P., Steffen, P., Stephens, K., Wagner, A., Walker, I., Weber, G., Zimmer, M., and Zorn, G.
Abstract: Abstract: Results are presented on an investigation of photons produced in multihadronic final states frome + e − annihilation at 35 GeV and 44 GeV center of mass energies. Scalling violation between 14 and 44 GeV is observed in inclusive photon spectra. Comparing inclusive π0 spectra with charged pion spectra it is found that the average π0 multiplicity exceeds the charged pion multiplicity scaled by factor of 0.5 by (165)% and (217)% at 35 and 44 GeV respectively. The excess can be attributed to isospin violating decays of hadrons. The η multiplicity is found to be 〈n η〈=0.640.090.06 at 35 GeV. With a significance of three standard deviations a signal from quark bremsstrahlung is observed. The measured charge asymmetry in hadronic final states, due to the interference between initial and final state radiation, ofA=−0.1410.041 is in accord with QED expectations. An interference effect in the azimuth angle distribution of charged jets around the photon direction is observed for the first time.
Published: 1990
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22. A measurement of the charmed quark asymmetry ine+e− annihilation

Author: Ould-Saada, F., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Kobayashi, T., Komamiya, S., Krehbiel, H., v. Krogh, J., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Minowa, H., Murphy, P. G., Naroska, B., Nye, J. M., Olsson, J., Ramcke, R., Rieseberg, H., Schmidt, D., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Wagner, A., Walker, I. W., Warming, P., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The charmed quark charge asymmetry has been measured at the average centre of mass energy of 35 GeV with the JADE detector at thee+e- storage ring PETRA. Charmed quarks were identified byD*± tagging using the ?M technique.D*± mesons were reconstructed through their decay intoD0 mesons resulting in (Kp) p and (K p p p) p final states. The measured charge asymmetryA=-0.149±0.067 is in agreement with the expectation from the electroweak interference effect in quantum flavour dynamics (QFD).
Published: 1989
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23. Search for leptoquarks and other new particles with lepton-hadron signature ine+e−interactions

Author: Bartel, W., Becker, L., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Steffen, P., Greenshaw, T., Hagemann, J., Heinzelmann, G., Kado, H., Kleinwort, C., Kuhlen, M., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Eckerlin, G., Elsen, E., Heintze, J., Hellenbrandt, K. -H., Komamiya, S., van Krogh, J., Rieseberg, H., v. d. Schmidt, H., Smolik, L., Spitzer, J., Wagner, A., Zimmer, M., Bowdery, C. K., Finch, A. J., Foster, F., Hughes, G., Nye, J. M., Walker, I. W., Allison, J., Barlow, R. J., Chrin, J., Duerdoth, I. P., Loebinger, F. K., Macbeth, A. A., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Hill, P., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Kawamoto, T., Kobayashi, T., Minowa, M., Takeda, H., and Yamada, S.
Abstract: Using the JADE detector at PETRA, a search for hadronic events with isolated leptons ine+e−annihilation was performed. No evidence was found for the production of leptoquarks or color octet leptons and mass limits were obtained. Three hadronic events, each of them with two isolated muons, were detected and found to be in agreement with predictions of theα4QED process. At the highest PETRA energies,, five events with low thrust,T<0.8, and a muon at a large angle with respect to the thrust axis, |cos δ|<0.7, were observed. The number of such events expected from an extrapolation of control data at lower energies is 0.56±0.18. No satisfactory explanation for the excess in terms of background could be found. A corresponding excess of electron events was not seen.
Published: 1987
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24. Neutral strange particle production in deep inelastic scattering at HERA

Author: Derick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Geitz, G., Grothe, M., Haas, T., Hartmann, H., Heinloth, K., Hilger, E., Jakob, H. -P., Katz, U. F., Mari, S. M., Mass, A., Mengel, S., Mollen, J., Paul, E., Rembser, Ch., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, H. F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O'Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamezyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarębska, E., Suszycki, L., Zając, J., Kotański, A., Przybycień, M., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D. J., Glasman, C., Göttlicher, P., Große-Knetter, J., Gutjahr, B., Hain, W., Hasell, D., Heßling, H., Iga, Y., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voß, T., Westphal, D., Wolf, G., Youngman, C., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mattingly, M. C. K., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Söldner-Rembold, S., Schroeder, J., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Fleck, J. I., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. Y. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Zhang, Y., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Fernandez, J. P., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Trocóniz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., Laurent, M. St., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Y. A., Kobrin, V. D., Kuzmin, V. A., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J. D., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Abbrendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Hubbard, B., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Bandyopadhyay, D., Benard, F., Brkic, M., Crombie, M. B., Gingrich, D. M., Hartner, G. F., Joo, K. K., Leyman, G. M., Martin, J. F., Orr, R. S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. -P., Frisken, W. R., Furutani, K. M., Khakzad, M., and Schmidke, W. B.
Abstract: This paper presents measurements ofK0 and ? production in neutral current, deep inelastic scattering of 26.7 GeV electrons and 820 GeV protons in the kinematic range 102<640 GeV2, 0.00030.04. Average multiplicities forK0 and ? production are determined for transverse momentapT>0.5 GeV and pseudorapidities |?|<1.3. The multiplicities favour a stronger strange to light quark suppression in the fragmentation chain than found ine+e- experiments. The production properties ofK0' s in events with and without a large rapidity gap with respect to the proton direction are compared. The ratio of neutralK0' s to charged particles per event in the measured kinematic range is, within the present statistics, the same in both samples.
Published: 1995
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25. Inclusive transverse momentum distributions of charged particles in diffractive and non-diffractive photoproduction at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Romeo, G. Cara, Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Garcia, Y. Zamora, Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Geitz, G., Grothe, M., Haas, T., Hartmann, H., Haun, D., Heinloth, K., Hilger, E., Jakob, H. -P., Katz, U. F., Mari, S. M., Mass, A., Mengel, S., Mollen, J., Paul, E., Rembser, Ch., Schattevoy, R., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, H. F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O'Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarębska, E., Suszycki, L., Zając, J., Kotański, A., Przybycień, M., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D. J., Glasman, C., Göttlicher, P., Große-Knetter, J., Gutjahr, B., Hain, W., Hasell, D., Heßling, H., Iga, Y., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Labs, L., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mańczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voß, T., Westphal, D., Wolf, G., Youngman, C., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mattingly, M. C. K., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Söldner-Rembold, S., Schroeder, J., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Fleck, J. I., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Mainusch, J., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. Y. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Zhang, Y., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., del Peso, J., Puga, J., Terron, J., de Trocóniz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., St.Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Y. A., Kobrin, V. D., Kuzmin, V. A., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Blair, G. A., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Daniels, D., Devenish, R. C. E., Harnew, N., Lancaster, M., Luffman, P. E., Lindemann, L., McFall, J. D., Nath, C., Noyes, V. A., Quadt, A., Uijterwaal, H., Walczak, R., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Hubbard, B., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Bandyopadhyay, D., Benard, F., Brkic, M., Crombie, M. B., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. -P., Frisken, W. R., Furutani, K. M., Khakzad, M., and Schmidke, W. B.
Abstract: Inclusive transverse momentum spectra of charged particles in photoproduction events in the laboratory pseudorapidity range -1.2T=8 GeV usign the ZEUS detector. Diffractive and non-diffractive reactions have been selected with an average ?p centre of mass (c.m.) energy of =180 GeV. For diffractive reactions, thepT spectra of the photon dissociation events have been measured in two intervals of the dissociated photon mass with mean values X>=5 GeV and 10 GeV. The inclusive transverse momentum spectra fall exponentially in the lowpT region. The non-diffractive data show a pronounced highpT tail departing from the exponential shape. ThepT distributions are compared to lower energy photoproduction data and to hadron-hadron collisions at a similar c.m. energy. The data are also compared to the results of a next-to-leading order QCD calculation.
Published: 1995
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26. Jet production in highQ2 deep-inelastic ep scattering at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Avad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Romeo, G. Cara, Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, E., Polini, A., Sartorelli, G., Timellini, R., Garcia, Y. Zamora, Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Geitz, G., Grothe, M., Haas, T., Hartmann, H., Haun, D., Heinloth, K., Hilger, E., Jakob, H. -P., Katz, U. F., Mari, S. M., Mass, A., Mengel, S., Mollen, J., Paul, E., Rembser, Ch., Schattevoy, R., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, H. F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O'Mara, J. A., Tapper, R. I., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Eskreys, K., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarębska, E., Suszycki, L., Zając, J., Kotański, A., Przybycień, M., Bauerdick, I. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D. J., Glasman, C., Göttlicher, P., Große-Knetter, J., Gutjahr, B., Hain, W., Hasell, D., Heßling, H., Hultschig, H., Iga, Y., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mańczak, O., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voß, T., Westphal, D., Wolf, G., Youngman, C., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mattingly, M., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Söldner-Rembold, S., Schroeder, J., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Fleck, I., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Mainusch, J., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. Y. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Zhang, Y., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., del Peso, J., Puga, J., Terron, J., de Trocóniz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., Laurent, M. St., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Y. A., Kobrin, V. D., Kuzmin, V. A., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Blair, G. A., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Daniels, D., Devenish, R. C. E., Harnew, N., Lancaster, M., Luffman, P. E., Lindemann, L., McFall, J. D., Nath, C., Noyes, V. A., Quadt, A., Uijterwaal, H., Walczak, R., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, L., Cartiglia, N., Dubbs, T., Heusch, C., Van Hook, M., Hubbard, B., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Biltzinger, J., Seifert, R. J., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Bandyopadhyay, D., Benard, F., Brkic, M., Crombie, M. B., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Kochocki, J., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. -P., Frisken, W. R., Furutani, K. M., Khakzad, M., and Schmidke, W. B.
Abstract: Two-jet production in deep-inelastic electron-proton scattering has been studied for 1602<1280 GeV2, 0.01
Published: 1995
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27. A comparison of measured jet cross sections with QCD calculations fore+e− annihilation

Author: Magnussen, N., Smolík, L., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Kobayashi, T., Komamiya, S., Krehbiel, H., v. Krogh, J., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Marshall, R., Mashimo, T., Meinke, R., Meyer, H., Middleton, R. P., Murphy, P. G., Naroska, B., Nozaki, M., Nye, J. M., Olsson, J., Ould-Saada, F., Pitzl, D. D., Ramcke, R., Rieseberg, H., Schmidt, D., von der Schmitt, H., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The cross sections for 2-, 3- and 4-jet production have been determined with the JADE detector, sited on thee+e--storage ring PETRA. Data at , 22, 35 and 44 GeV were compared to twoO(as2) QCD calculations. A first analysis was performed with uncorrected data using theO(as2) 3-jet matrix element calculation of Ellis, Ross and Terrano and the Lund String Monte Carlo program. In a second analysis the calculation of Kramer and Lampe was compared to corrected data. Both approaches gave a poor description of the data when the square of the momentum transferQ2=s was used as the scale of the running coupling constant. The description improved when the renormalization scale was adjusted to the process studied. The data ware used to fix the best renormalization scale.
Published: 1991
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28. A measurement of the average lifetime of B-hadrons produced bye+e−-collision at <img src="/fulltext-image.asp?format=htmlnonpaginated&src=R765745GR3151184_html\10052_2005_Article_BF01572021_TeX2GIFIE1.gif" border="

Author: Hagemann, J., Ramcke, R., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Kobayashi, T., Komamiya, S., Krehbiel, H., Krogh, J. v., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Mashimo, T., Meinke, R., Middleton, R. P., Murphy, P. G., Naroska, B., Nozaki, M., Nye, J. M., Olsson, J., Ould-Saada, F., Rieseberg, H., Schmidt, D., von der Schmitt, H., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: Data taken with an improved tracking system have been used to determine the average lifetime of B-hadrons, τB. A study of the pseudo decay length gave $$\tau _B = (1.46 \pm 0.22(stat.) \pm 0.34(syst.)) ps$$ . From the impact parameter distribution of highp ⊥ electrons and muons, values of $$\tau _B = \left( {1.27_{ - 0.29}^{ + 0.35} \pm 0.17} \right) ps$$ and $$\tau _B = \left( {1.36_{ - 0.27}^{ + 0.32} \pm 0.14} \right) ps$$ were obtained. Combining these results, allowing for correlations and adding statistical and systematic errors in quadrature, we obtain $$\tau _B = \left( {1.36_{ - 0.23}^{ + 0.25} } \right) ps$$
Published: 1990
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29. Measurement of two photon production of ρ0ω

Author: Wegner, A., Olsson, J., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Elsen, E., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K. H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kawamoto, T., Kleinwort, C., Knies, G., Komamiya, S., Krehbiel, H., Krogh, J. v., Kuhlen, M., Loebinger, F. K., Macbeth, A. A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R. P., Murphy, P. G., Naroska, B., Nye, J. M., Ould-Saada, F., Pitzl, D., Ramcke, R., Rieseberg, H., Schmidt, D., Smolik, L., Schneekloth, U., Skard, J. A. J., Spitzer, J., Steffen, P., Stephens, K., Takeshita, T., Wagner, A., Walker, I. W., Weber, G., Zimmer, M., and Zorn, G. T.
Abstract: The reaction ???p+p-p+p-p0 has been studied using the JADE detector at PETRA. The cross sections for ????p+- and for ?????0- are given. We observe no peak in these cross sections in the regionW??=1.9–2.0 GeV.
Published: 1990
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30. The iron calorimeter and muon identifier for SLD

Author: Benvenuti, A.C., Callegari, G., Piemontese, L., Calcaterra, A., De Sangro, R., De Simone, P., Peruzzi, I., Piccolo, M., Busza, W., Cartwright, S.L., Friedman, J.I., Fuess, S., Gonzalez, S., Hansl-Kozanecka, T., Kendall, H.W., Lyons, T., Osborne, L.S., Rosenson, L., Schneekloth, U., Taylor, F.E., Verdier, R., Williams, D., Yamartino, J.M., Bacchetta, N., Bisello, D., Castro, A., Loreti, M., Pescara, L., Toniolo, D., Wyss, J., Alpat, B., Artemi, C., Battiston, R., Bilei, G.M., Cappelletti, C., Dell'Orso, R., Mantovani, G., Pauluzzi, M., Scarlatella, M., Servoli, L., Beconcini, F., Castaldi, R., Vannini, C., Verdini, P.G., Byers, B.L., Kharakh, D., Messner, R.L., Zdarko, R.W., and Johnson, J.R.
Abstract: The iron flux-return structure for the SLC Large Detector (SLD) has been instrumented with plastic streamer tubes covering an area of about 4500 m2, to provide muon identification plus energy measurement of hadron showers. A description is given of the production techniques used to construct this large detector system, with an emphasis on the methods by which high reliability and a small number of defects in the completed assembly were ensured.
Published: 1989
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31. Observation of events with an energetic forward neutron in deep inelastic scattering at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Okrasinski, J.R., Repond, J., Stanek, R., Talaga, R.L., Zhang, H., Mattingly, M.C.K., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Polini, A., Sartorelli, G., Zamora Garcia, Y., Zichichi, A., Amelung, C., Bornheim, A., Crittenden, J., Deffner, R., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H.-P., Katz, U.F., Mengel, S., Paul, E., Pfeiffer, M., Rembser, Ch., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Cottingham, W.N., Dyce, N., Foster, B., George, S., Hayes, M.E., Heath, G.P., Heath, H.F., Piccioni, D., Roff, D.G., Tapper, R.J., Yoshida, R., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Caldwell, A., Cartiglia, N., Jing, Z., Liu, W., Parsons, J.A., Titz, S., Sciulli, F., Straub, P.B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Jakubowski, Z., Przybycień, M.B., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zarȩbska, E., Suszycki, L., Zaja̧c, J., Duliński, Z., Kotański, A., Abbiendi, G., Bauerdick, L.A.T., Behrens, U., Beier, H., Bienlein, J.K., Cases, G., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D.J., Glasman, C., Göttlicher, P., Große-Knetter, J., Haas, T., Hain, W., Hasell, D., Heßling, H., Iga, Y., Johnson, K.F., Joos, P., Kasemann, M., Klanner, R., Koch, W., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Milewski, J., Monteiro, T., Ng, J.S.T., Notz, D., Ohrenberg, K., Poitrzkowski, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Surrow, B., Voß, T., Westphal, D., Wolf, G., Wollmer, U., Youngman, C., Zeuner, W., Grabosch, H.J., Kharchilava, A., Mari, S.M., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Gallo, E., Pelfer, P., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Trefzger, T., Wölfle, S., Bromley, J.T., Brook, N.H., Bussey, P.J., Doyle, A.T., Saxon, D.H., Sinclair, L.E., Utley, M.L., Wilson, A.S., Dannemann, A., Holm, U., Horstmann, D., Sinkus, R., Wick, K., Burow, B.D., Hagge, L., Lohrmann, E., Poelz, G., Schott, W., Zetsche, F., Bacon, T.C., Brümmer, N., Butterworth, I., Harris, V.L., Howell, G., Hung, B.H.Y., Lamberti, L., Long, K.R., Miller, D.B., Pavel, N., Prinias, A., Sedgbeer, J.K., Sideris, D., Whitfield, A.F., Mallik, U., Wang, M.Z., Wang, S.M., Wu, J.T., Cloth, P., Filges, D., An, S.H., Cho, G.H., Ko, B.J., Lee, S.B., Nam, S.W., Park, H.S., Park, S.K., Kartik, S., Kim, H.-J., McNeil, R.R., Metcalf, W., Nadendla, V.K., Barreiro, F., Fernandez, J.P., Graciani, R., Hernández, J.M., Hervás, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Trocóniz, J.F., Corriveau, F., Hanna, D.S., Hartmann, J., Hung, L.W., Lim, J.N., Matthews, C.G., Patel, P.M., Riveline, M., Stairs, D.G., St-Laurent, M., Ullmann, R., Zacek, G., Tsurugai, T., Bashkirov, V., Dolgoshein, B.A., Stifutkin, A., Bashindzhagyan, G.L., Ermolov, P.F., Gladilin, L.K., Golubkov, Yu.A., Kobrin, V.D., Korzhavina, I.A., Kuzmin, V.A., Lukina, O.Yu., Proskuryakov, A.S., Savin, A.A., Shcheglova, L.M., Solomin, A.N., Zotov, N.P., Botje, M., Chlebana, F., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., van Sighem, A., Tiecke, H., Verkerke, W., Vossebeld, J., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L.S., Gilmore, J., Li, C., Ling, T.Y., Nylander, P., Park, I.H., Romanowski, T.A., Bailey, D.S., Cashmore, R.J., Cooper-Sarkar, A.M., Devenish, R.C.E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J.D., Nath, C., Noyes, V.A., Quadt, A., Tickner, J.R., Uijterwaal, H., Walczak, R., Waters, D.S., Wilson, F.F., Yip, T., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Zuin, F., Bulmahn, J., Feild, R.G., Oh, B.Y., Whitmore, J.J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J.C., McCubbin, N.A., Shah, T.P., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, W., Rahn, J.T., Sadrozinski, H.F.-W., Seiden, A., Williams, D.C., Biltzinger, J., Seifert, R.J., Schwarzer, O., Walenta, A.H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Fleck, J.I., Inuzuka, M., Ishii, T., Kuze, M., Mine, S., Nakao, M., Suzuki, I., Tokushuku, K., Umemori, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Matsushita, T., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M.I., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D.C., Benard, F., Brkic, M., Fagerstroem, C.-P., Hartner, G.F., Joo, K.K., Levman, G.M., Martin, J.F., Orr, R.S., Polenz, S., Sampson, C.R., Simmons, D., Teuscher, R.J., Butterworth, J.M., Catterall, C.D., Jones, T.W., Kaziewicz, P.B., Lane, J.B., Saunders, R.L., Shulman, J., Sutton, M.R., Lu, B., Mo, L.W., Bogusz, W., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R.J., Pawlak, J.M., Tymieniecka, T., Wróblewski, A.K., Zakrzewski, J.A., Żarnecki, A.F., Adamus, M., Coldewey, C., Eisenberg, Y., Hochman, D., Karshon, U., Revel, D., Zer-Zion, D., Badgett, W.F., Breitweg, J., Chapin, D., Cross, R., Dasu, S., Foudas, C., Loveless, R.J., Mattingly, S., Reeder, D.D., Silverstein, S., Smith, W.H., Vaiciulis, A., Wodarczyk, M., Bhadra, S., Cardy, M.L., Fagerstroem, C.-P., Frisken, W.R., Furutani, K.M., Khakzad, M., Murray, W.N., and Schmidke, W.B.
Abstract: In deep inelastic neutral current scattering of positrons and protons at the center of mass energy of 300 GeV, we observe, with the ZEUS detector, events with a high energy neutron produced at very small scattering angles with respect to the proton direction. The events constitute a fixed fraction of the deep inelastic, neutral current event sample independent of Bjorken xand Q2in the range 3 · 10−4< xBJ< 6 · 10−3and 10 < Q2< 100 GeV2.
Published: 1996
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32. Dijet angular distributions in direct and resolved photoproduction at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Okrasinski, J.R., Repond, J., Stanek, R., Talaga, R.L., Zhang, H., Mattingly, M.C.K., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Polini, A., Sartorelli, G., Zamora Garcia, Y., Zichichi, A., Amelung, C., Bornheim, A., Crittenden, J., Deffner, R., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H.-P., Katz, U.F., Mengel, S., Paul, E., Pfeiffer, M., Rembser, Ch., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Cottingham, W.N., Dyce, N., Foster, B., George, S., Hayes, M.E., Heath, G.P., Heath, H.F., Piccioni, D., Roff, D.G., Tapper, R.J., Yoshida, R., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Caldwell, A., Cartiglia, N., Jing, Z., Liu, W., Parsons, J.A., Ritz, S., Sciulli, F., Straub, P.B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Jakubowski, Z., Przybycień, M.B., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zarȩbska, E., Suszycki, L., Zaja̧c, J., Duliński, Z., Kotański, A., Abbiendi, G., Bauerdick, L.A.T., Behrens, U., Beier, H., Bienlein, J.K., Cases, G., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D.J., Glasman, C., Göttlicher, P., Große-Knetter, J., Haas, T., Hain, W., Hasell, D., Heßling, H., Iga, Y., Johnson, K.F., Joos, P., Kasemann, M., Klanner, R., Koch, W., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Milewski, J., Monteiro, T., Ng, J.S.T., Notz, D., Ohrenberg, K., Piotrzkowski, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Surrow, B., Voß, T., Westphal, D., Wolf, G., Wollmer, U., Youngman, C., Zeuner, W., Grabosch, H.J., Kharchilava, A., Mari, S.M., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Gallo, E., Pelfer, P., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Trefzger, T., Wölfle, S., Bromley, J.T., Brook, N.H., Bussey, P.J., Doyle, A.T., Saxon, D.H., Sinclair, L.E., Utley, M.L., Wilson, A.S., Dannemann, A., Holm, U., Horstmann, D., Sinkus, R., Wick, K., Burow, B.D., Hagge, L., Lohrmann, E., Poelz, G., Schott, W., Zetsche, F., Bacon, T.C., Brümmer, N., Butterworth, I., Harris, V.L., Howell, G., Hung, B.H.Y., Lamberti, L., Long, K.R., Miller, D.B., Pavel, N., Prinias, A., Sedgbeer, J.K., Sideris, D., Whitfield, A.F., Mallik, U., Wang, M.Z., Wang, S.M., Wu, J.T., Cloth, P., Filges, D., An, S.H., Cho, G.H., Ko, B.J., Lee, S.B., Nam, S.W., Park, H.S., Park, S.K., Kartik, S., Kim, H.-J., McNeil, R.R., Metcalf, W., Nadendla, V.K., Barreiro, F., Fernandez, J.P., Graciani, R., Hernández, J.M., Hervás, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Trocóniz, J.F., Corriveau, F., Hanna, D.S., Hartmann, J., Hung, L.W., Lim, J.N., Matthews, C.G., Patel, P.M., Riveline, M., Stairs, D.G., St-Laurent, M., Ullmann, R., Zacek, G., Tsurugai, T., Bashkirov, V., Dolgoshein, B.A., Stifutkin, A., Bashindzhagyan, G.L., Ermolov, P.F., Gladilin, L.K., Golubkov, Yu.A., Kobrin, V.D., Korzhavina, I.A., Kuzmin, V.A., Lukina, O.Yu., Proskuryakov, A.S., Savin, A.A., Shcheglova, L.M., Solomin, A.N., Zotov, N.P., Botje, M., Chlebana, F., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., van Sighem, A., Tiecke, H., Verkerke, W., Vossebeld, J., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L.S., Gilmore, J., Li, C., Ling, T.Y., Nylander, P., Park, I.H., Romanowski, T.A., Bailey, D.S., Cashmore, R.J., Cooper-Sarkar, A.M., Devenish, R.C.E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J.D., Nath, C., Noyes, V.A., Quadt, A., Tickner, J.R., Uijterwaal, H., Walczak, R., Waters, D.S., Wilson, F.F., Yip, T., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Zuin, F., Bulmahn, J., Feild, R.G., Oh, B.Y., Whitmore, J.J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J.C., McCubbin, N.A., Shah, T.P., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, W., Rahn, J.T., Sadrozinski, H.F.-W., Seiden, A., Williams, D.C., Biltzinger, J., Seifert, R.J., Schwarzer, O., Walenta, A.H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Fleck, J.I., Inuzuka, M., ishii, T., Kuze, M., Mine, S., Nakao, M., Suzuki, I., Tokushuku, K., Umemori, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Matsushita, T., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M.I., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staino, A., Dardo, M., Bailey, D.C., Benard, F., Brkic, M., Fagerstroem, C.-P., Hartner, G.F., Joo, K.K., Levman, G.M., Martin, J.F., Orr, R.S., Polenz, S., Sampson, C.R., Simmons, D., Teuscher, R.J., Butterworth, J.M., Catterall, C.D., Jones, T.W., Kaziewicz, P.B., Lane, J.B., Saunders, R.L., Shulman, J., Sutton, M.R., Lu, B., Mo, L.W., Bogusz, W., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R.J., Pawlak, J.M., Tymieniecka, T., Wróblewski, A.K., Zakrzewski, J.A., Żarnecki, A.F., Adamus, M., Coldewey, C., Eisenberg, Y., Hochman, D., Karshon, U., Revel, D., Zer-Zion, D., Badgett, W.F., Breitweg, J., Chapin, D., Cross, R., Dasu, S., Foudas, C., Loveless, R.J., Mattingly, S., Reeder, D.D., Silverstein, S., Smith, W.H., Vaiciulis, A., Wodarczyk, M., Bhadra, S., Cardy, M.L., Frisken, W.R., Khakzad, M., Murray, W.N., and Schmidke, W.B.
Abstract: Jet photoproduction, where the two highest transverse energy (ETjet) jets have ETjetabove 6 GeV and a jet-jet invariant mass above 23 GeV, has been studied with the ZEUS detector at the HERA epcollider. Resolved and direct photoproduction samples have been separated. The cross section as a function of the angle between the jet-jet axis and the beam direction in the dijet rest frame has been measured for the two samples. The measured angular distributions differ markedly from each other. They agree with the predictions of QCD calculations, where the different angular distributions reflect the different spins of the quark and gluon exchanged in the hard subprocess.
Published: 1996
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33. Measurement of the proton structure function F2in ep scattering at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Musgrave, B., Repond, J., Repond, S., Stanek, R., Talaga, R.L., Thron, J., Arzarello, F., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romero, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Ciralli, F., Contin, A., D'Auria, S., Del Papa, C., Frasconi, F., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Lin, O., Losowski, B., Maccarrone, G., Margotti, A., Massam, T., Monaldi, D., Nania, R., Nemoz, C., Palmonari, F., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichini, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Frey, A., Geerts, M., Geitz, G., Hartmann, H., Haun, D., Heinloth, K., Hilger, E., Jacob, H.-P., Kramaczyk, S., Kückes, M., Mass, A., Mengel, S., Mollen, J., Müsch, H., Paul, E., Schattevoy, R., Schneider, J.-L., Schramm, D., Wedemeyer, R., Cassidy, A., Cussans, D.G., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G.P., Heath, H.F., Lancaster, M., Llwellyn, T.J., Morgado, C.J.S., O'Mara, J.A., Tapper, R.J., Wilson, S.S., Yoshida, R., Rau, R.R., Arneodo, M., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Gialas, I., Parsons, J.A., Ritz, S., Sciulli, F., Straub, P.B., Wai, L., Yang, S., Borzemski, P., Chwastowski, J., Dwuraźny, A., Eskreys, A., Jakubowski, Z., Nizioł, B., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Eskreys, K., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarȩbska, E., Suszycki, L., Zaja̧c, J., Kȩdzierski, T., Kotański, A., Przybycień, M., Bauerdick, L.A.T., Behrens, U., Bienlein, J.K., Böttcher, S., Coldewey, C., Dannemann, A., Drews, G., Erhard, P., Flasiński, M., Fleck, I., Gilkinson, D.J., Gläser, R., Göttlicher, P., Gutjahr, B., Haas, T., Hagge, L., Hain, W., Hasell, D., Hultschig, H., Jahnen, G., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Kröger, W., Krüger, J., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Momayezi, M., Ng, J.S.T., Nickel, S., Notz, D., Pösnecker, K.-U., Rohde, M., Roldán, J., Ros, E., Schneekloth, U., Schroeder, J., Schulz, W., Selonke, F., Stiliaris, E., Tscheslog, E., Tsurugai, T., Vogel, W., Westphal, D., Wolf, G., Youngman, C., Grabosch, H.J., Leich, A., Meyer, A., Rethfeldt, C., Schlenstedt, S., Barbagli, G., Francescato, A., Nuti, M., Pelfer, P., Anzivino, G., Casaccia, R., De Pasquale, S., Qian, S., Votano, L., Bamberger, A., Freidhof, A., Poser, T., Söldner-Rembold, S., Theisen, G., Trefzger, T., Brook, N.H., Bussey, P.J., Doyle, A.T., Forbes, J.R., Jamieson, V.A., Raine, C., Saxon, D.H., Brückmann, H., Gloth, G., Holm, U., Kammerlocher, H., Krebs, B., Neumann, T., Wick, K., Fürtjes, A., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Terron, J., Zetsche, F., Bacon, T.C., Beuselinck, R., Butterworth, I., Gallo, E., Harris, V.L., Miller, D.B., Prinias, A., Sedgbeer, J.K., Vorvolakos, A., Whitfield, A., Bienz, T., Kreutzmann, H., Mallik, U., McCliment, E., Roco, M., Wang, M.Z., Cloth, P., Filges, D., An, S.H., Hong, S.M., Kim, C.O., Kim, T.Y., Nam, S.W., Park, S.K., Suh, M.H., Yon, S.H., Imlay, R., Kartik, S., Kim, H.-J., McNeil, R.R., Metcalf, W., Nadendla, V.K., Barreiro, F., Cases, G., Hervás, L., Labarga, L., del Peso, J., de Trocóniz, J.F., Ikraiam, F., Mayer, J.K., Smith, G.R., Corriveau, F., Hanna, D.S., Hartmann, J., Hung, L.W., Lim, J.N., Meijer Drees, R., Matthews, C., Mitchell, J.W., Patel, P.M., Sinclair, L.E., Stairs, D.G., St.Laurent, M., Ullmann, R., Bashindzhagyan, G.L., Ermolov, P.F., Gladilin, L.K., Golubkov, Y.A., Kuzmin, V.A., Kuznetsov, E.N., Savin, A.A., Voronin, A.G., Zotov, N.P., Bentvelsen, S., Botje, M., Dake, A., Engelen, J., de Jong, P., de Kamps, M., Kooijman, P., Kruse, A., van der Lugt, H., O'Dell, V., Tenner, A., Tiecke, H., Uijterwaal, H., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Bylsma, B., Durkin, L.S., Honscheid, K., Li, C., Ling, T.Y., McLean, K.W., Murray, W.N., Park, I.H., Romanowski, T.A., Seidlein, R., Blair, G.A., Byrne, A., Cashmore, R.J., Cooper-Sarkar, A.M., Devenish, R.C.E., Gingrich, D.M., Hallam-Baker, P.M., Harnew, N., Khatri, T., Long, K.R., Luffman, P., McArthur, I., Morawitz, P., Nash, J., Smith, S.J.P., Roocroft, N.C., Wilson, F.F., Abbiendi, G., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Gasparini, F., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Butterworth, J.M., Bulmahn, J., Feild, G., Oh, B.Y., Whitmore, J., Contino, U., D'Agostini, G., Guida, M., Iori, M., Mari, S.M., Marini, G., Mattioli, M., Nigro, A., Hart, J.C., McCubbin, N.A., Prytz, K., Shah, T.P., Short, T.L., Barberis, E., Cartiglia, N., Heusch, C., Hubbard, B., Leslie, J., Lockman, W., O'Shaughnessy, K., Sadrozinski, H.F., Seiden, A., Zer-Zion, D., Badura, E., Biltzinger, J., Seifert, R.J., Walenta, A.H., Zech, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kasai, S., Kuze, M., Mine, S., Nagasawa, Y., Nagira, T., Nakao, M., Okuno, H., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nagayama, S., Nakamitsu, Y., Cirio, R., Costa, M., Ferrero, M.I., Lamberti, L., Maselli, S., Peroni, C., Solano, A., Sacchi, R., Staiano, A., Dardo, M., Bailey, D.C., Bandyopadhyay, D., Bernard, F., Bhadra, S., Brkic, M., Burow, B.D., Chlebana, F.S., Crombie, M.B., Hartner, G.F., Levman, G.M., Martin, J.F., Orr, R.S., Prentice, J.D., Sampson, C.R., Stairs, G.G., Teuscher, R.J., Yoon, T.-S., Bullock, F.W., Catterall, C.D., Giddings, J.C., Jones, T.W., Khan, A.M., Lane, J.B., Makkar, P.L., Shaw, D., Shulman, J., Blankenship, K., Kochocki, J., Lu, B., Mo, L.W., Charchuła, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyanowski, M., Muchorowski, K., Nowak, R.J., Pawlak, J.M., Stopczyński, A., Tymieniecka, T., Walczak, R., Wróblewski, A.K., Zakrzewski, J.A., arnecki, A.F., Adamus, M., Abramowicz, H., Eisenberg, Y., Glasman, C., Karshon, U., Montag, A., Revel, D., Shapira, A., Foudas, C., Fordham, C., Loveless, R.J., Goussiou, A., Ali, I., Behrens, B., Dasu, S., Reeder, D.D., Smith, W.H., Silverstein, S., Frisken, W.R., Furutani, K.M., and Iga, Y.
Abstract: This paper presents our first measurement of the F2structure function in neutral-current, deep inelastic scattering using the ZEUS detector at HERA, the epcolliding beam facility at DESY. The data correspond to an integrated luminosity of 24.7 nb−1. Results are presented for data in range of Q2from 10 GeV2to 4700 GeV2and Bjorken xdown to 3.0 × 10−4. The F2structure function increases rapidly as xdecreases.
Published: 1993
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34. Measurement of the diffractive structure functionF2D(4)at HERA

Author: Breitweg, J., Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R., Yoshida, R., Zhang, H., Mattingly, M., Anselmo, F., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Pasquale, S., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Pesci, A., Polini, A., Ricci, F., Sartorelli, G., Zamora Garcia, Y., Zichichi, A., Amelung, C., Bornheim, A., Brock, I., Coböken, K., Crittenden, J., Deffner, R., Eckert, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H., Katz, U., Kerger, R., Paul, E., Pfeiffer, M., Rembser, Ch., Stamm, J., Wedemeyer, R., Wieber, H., Bailey, D., Campbell-Robson, S., Cottingham, W., Foster, B., Hall-Wilton, R., Hayes, M., Heath, G., Heath, H., McFall, J., Piccioni, D., Roff, D., Tapper, R., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Kim, J., Lee, J., Lim, L., Pac, M., Caldwell, A., Cartiglia, N., Jing, Z., Liu, W., Mellado, B., Parsons, J., Ritz, S., Sampson, S., Sciulli, F., Straub, P., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Figiel, J., Klimek, K., Przybycień, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Bukowy, M., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zareebska, E., Suszycki, L., Zajac, J., Duliński, Z., Kotański, A., Abbiendi, G., Bauerdick, L., Behrens, U., Beier, H., Bienlein, J., Cases, G., Deppe, O., Desler, K., Drews, G., Fricke, U., Gilkinson, D., Glasman, C., Göttlicher, P., Haas, T., Hain, W., Hasell, D., Johnson, K., Kasemann, M., Koch, W., Kötz, U., Kowalski, H., Labs, J., Lindemann, L., Löhr, B., Löwe, M., Mańczak, O., Milewski, J., Monteiro, T., Ng, J., Notz, D., Ohrenberg, K., Park, I., Pellegrino, A., Pelucchi, F., Piotrzkowski, K., Roco, M., Rohde, M., Roldán, J., Ryan, J., Savin, A., Schneekloth, U., Selonke, F., Surrow, B., Tassi, E., Voß, T., Westphal, D., Wolf, G., Wollmer, U., Youngman, C., Zarnecki, A., Zeuner, W., Burow, B., Grabosch, H., Meyer, A., Schlenstedt, S., Barbagli, G., Gallo, E., Pelfer, P., Anzivino, G., Maccarrone, G., Votano, L., Barberger, A., Eisenhardt, S., Markun, P., Trefzger, T., Wölfle, S., Bromley, J., Brook, N., Bussey, P., Doyle, A., Macdonald, N., Saxon, D., Sinclair, L., Strickland, E., Waugh, R., Bohnet, I., Gendner, N., Holm, U., Meyer-Larsen, A., Salchi, H., Wick, K., Gladilin, L., Horstmann, D., Kçira, D., Klanner, R., Lohrmann, E., Poelz, G., Schott, W., Bacon, T., Butterworth, I., Cole, J., Howell, G., Hung, B., Lamberti, L., Long, K., Prinias, A., Sedgbeer, J., Sideris, D., Mallik, U., Wang, S., Wu, J., Cloth, P., Filges, D., Fleck, J., Ishii, T., Kuze, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamauchi, K., Yamazaki, Y., Hong, S., Lee, S., Nam, S., Park, S., Barreiro, F., Fernández, J., García, G., Graciani, R., Hernández, J., Hervás, L., Labarga, L., Martínez, M., Peso, J., Puga, J., Terrón, J., Trocóniz, J., Corriveau, F., Hanna, D., Hartmann, J., Hung, L., Murray, N., Ochs, A., Riveline, M., Stairs, D., St-Laurent, M., Ullmann, R., Tsurugai, T., Bashkirov, V., Dolgoshein, B., Stifutkin, A., Bashindzhagyan, G., Ermolov, P., Golubkov, Yu., Khein, L., Korotkova, N., Korzhavina, I., Kuzmin, V., Lukina, O., Proskuryakov, A., Shcheglova, L., Solomin, A., Zotkin, S., Bokel, C., Botje, M., Brummer, N., Chlebana, F., Engelen, J., Koffeman, E., Kooijman, P., Sighem, A., Tiecke, H., Tuning, N., Verkerke, W., Vossebeld, J., Vreeswijk, M., Wiggers, L., Wolf, E., Acosta, D., Bylsma, B., Durkin, L., Gilmore, J., Ginsburg, C., Kim, C., Ling, T., Nylander, P., Romanowski, T., Blaikley, H., Cashmore, R., Cooper-Sarkar, A., Devenish, R., Edmonds, J., Große-Knetter, J., Harnew, N., Lancaster, M., Nath, C., Noyes, V., Quadt, A., Ruske, O., Tickner, J., Uijterwaal, H., Walczak, R., Waters, D., Bertolin, A., Bruguera, R., Carlin, R., Corso, F., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Oh, B., Okrasinski, J., Toothacker, W., Whitmore, J., Iga, Y., D'Agostini, G., Marini, G., Nigro, A., Raso, M., Hart, J., McCubbin, N., Shah, T., Barberis, E., Epperson, D., Heusch, C., Rahn, J., Sadrozinski, H., Seiden, A., Wichmann, R., Williams, D., Schwarzer, O., Walenta, A., Abramowicz, H., Briskin, G., Dagan, S., Kananov, S., Levy, A., Abe, T., Fusayasu, T., Inuzuka, M., Nagano, K., Umemori, K., Yamashita, T., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Matsushita, T., Cirio, R., Costa, M., Ferrero, M., Maselli, S., Monaco, V., Peroni, C., Petrucci, M., Ruspa, M., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D., Fagerstroem, C., Galea, R., Hartner, G., Joo, K., Levman, G., Martin, J., Orr, R., Polenz, S., Sabetfakhri, A., Simmons, D., Teuscher, R., Butterworth, J., Catterall, C., Jones, T., Lane, J., Saunders, R., Shulman, J., Sutton, M., Wing, M., Ciborowski, J., Grzelak, G., Kasprzak, M., Muchorowski, K., Nowak, R., Pawlak, J., Pawlak, R., Tymieniecka, T., Wróblewski, A., Zakrzewski, J., Adamus, M., Coldewey, C., Eisenberg, Y., Hochman, D., Karshon, U., Badgett, W., Chapin, D., Cross, R., Dasu, S., Foudas, C., Loveless, R., Mattingly, S., Reeder, D., Smith, W., Vaiciulis, A., Wodarczyk, M., Bhadra, S., Frisken, W., Khakzad, M., and Schmidke, W.
Abstract: This paper presents the first analysis of diffractive photon dissociation events in deep inelastic positron-proton scattering at HERA in which the proton in the final state is detected and its momentum measured. The events are selected by requiring a scattered proton in the ZEUS leading proton spectrometer (LPS) with χL> 0.97, where xL is the fraction of the incoming proton beam momentum carried by the scattered proton. The use of the LPS significantly reduces the contamination from events with diffractive dissociation of the proton into low mass states and allows a direct measurement of t, the square of the four-momentum exchanged at the proton vertex. The dependence of the cross section ontis measured in the interval 0.073 < |t| < 0.4 GeV2and is found to be described by an exponential shape with the slope parameterb= 7.2 ± 1.1(stat.)−0.9+0.7(syst.) GeV−2. The diffractive structure function FD (4) is presented as 0.9 a function of χH≃ 1 − χLand β, the momentum fraction of the struck quark with respect to χH, and averaged over thetinterval 0.073 < |t′ < 0.4 GeV2and the photon virtuality range 5
Published: 1998
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35. Dijet cross sections in photoproduction at HERA

Author: Breitweg, J., Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R., Yoshida, R., Zhang, H., Mattingly, M., Anselmo, F., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Romeo, G., Castellini, G., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Pasquale, S., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Pesci, A., Polini, A., Ricci, F., Sartorelli, G., Zamora Garcia, Y., Zichichi, A., Amelung, C., Bornheim, A., Brock, I., Coböken, K., Crittenden, J., Deffner, R., Eckert, M., Feld, L., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H., Katz, U., Kerger, R., Paul, E., Pfeiffer, M., Rembser, Ch., Stamm, J., Wedemeyers, R., Wieber, H., Bailey, D., Campbell-Robson, S., Cottingham, W., Foster, B., Hall-Wilton, R., Hayes, M., Heath, G., Heath, H., McFall, J., Piccioni, D., Roff, D., Tapper, R., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Kim, J., Lee, J., Lim, I., Pac, M., Caldwell, A., Cartiglia, N., Jing, Z., Liu, W., Mellado, B., Parsons, J., Ritz, S., Sampson, S., Sciulli, F., Straub, P., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Figiel, J., Klimek, K., Przybycień, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Bukowy, M., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zareebska, E., Suszycki, L., Zajac, J., Duliński, Z., Kotański, A., Abbiendi, G., Bauerdick, L., Behrens, U., Beier, H., Bienlein, J., Cases, G., Deppe, O., Desler, K., Drews, G., Fricke, U., Gilkinson, D., Glasman, C., Göttlicher, P., Haas, T., Hain, W., Hasell, D., Johnson, K., Kasemann, M., Koch, W., Kötz, U., Kowalski, H., Labs, J., Lindemann, L., Löhr, B., Löwe, M., Mańczak, O., Milewski, J., Monteiro, T., Ng, J., Notz, D., Ohrenberg, K., Park, I., Pellegrino, A., Pelucchi, F., Piotrzkowski, K., Roco, M., Rohde, M., Roldán, J., Ryan, J., Savin, A., Schneekloth, U., Selonke, F., Surrow, B., Tassi, E., Voß, T., Westphal, D., Wolf, G., Wollmer, U., Youngman, C., Zarnecki, A., Zeuner, W., Burow, B., Grabosch, H., Meyer, A., and Schlenstedt, S.
Abstract: Dijet cross sections are presented using photoproduction data obtained with the ZEUS detector during 1994. These measurements represent an extension of previous results, as the higher statistics allow cross sections to be measured at higher jet transverse energy (Eτjet). Jets are identified in the hadronic final state using three different algorithms, and the cross sections compared to complete next-to-leading order QCD calculations. Agreement with these calculations is seen for the pseudorapidity dependence of the direct photon events with ETjet> 6 GeV and of the resolved photon events with Etjet> 11 GeV. Calculated cross sections for resolved photon processes with 6 GeV < ETjet< 11 GeV lie below the data.
Published: 1998
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36. Study of charged—currentepinteractions atQ2>200 GeV2with the ZEUS detector at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Okrasinski, J. R., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Mattingly, M. C. K., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Romeo, G. Cara, Castellini, G., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Pesci, A., Polini, A., Sartorelli, G., Garcia, Y. Zamora, Zichichi, A., Amelung, C., Bornheim, A., Crittenden, J., Deffner, R., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H. -P., Katz, U. F., Mengel, S., Paul, E., Pfeiffer, M., Rembser, Ch., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Cottingham, W. N., Dyce, N., Foster, B., George, S., Hayes, M. E., Heath, G. P., Heath, H. F., Piccioni, D., Roff, D. G., Tapper, R. J., Yoshida, R., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Caldwell, A., Cartiglia, N., Jing, Z., Liu, W., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Jakubowski, Z., Przybycień, M. B., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zarębska, E., Suszycki, L., Zając, J., Duliński, Z., Kotański, A., Abbiendi, G., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Cases, G., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D. J., Glasman, C., Göttlicher, P., Große-Knetter, J., Haas, T., Hain, W., Hasell, D., Heßling, H., Iga, Y., Johnson, K. F., Joos, P., Kasemann, M., Klanner, R., Koch, W., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Milewski, J., Monteiro, T., Ng, J. S. T., Notz, D., Ohrenberg, K., Piotrzkowski, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Surrow, B., Tassi, E., Voß, T., Westphal, D., Wolf, G., Wollmer, U., Youngman, C., Zeuner, W., Grabosch, H. J., Kharchilava, A., Mari, S. M., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Gallo, E., Pelfer, P., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Trefzger, T., Wölfle, S., Bromley, J. T., Brook, N. H., Bussey, P. J., Doyle, A. T., Saxon, D. H., Sinclair, L. E., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Sinkus, R., Wick, K., Burow, B. D., Hagge, L., Lohrmann, E., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Brümmer, N., Butterworth, I., Harris, V. L., Howell, G., Hung, B. H. Y., Lamberti, L., Long, K. R., Miller, D. B., Pavel, N., Prinias, A., Sedgbeer, J. K., Sideris, D., Whitfield, A. F., Mallik, U., Wang, M. Z., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., An, S. H., Cho, G. H., Ko, B. J., Lee, S. B., Nam, S. W., Park, H. S., Park, S. K., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Fernandez, J. P., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Trocóniz, J. F., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Riveline, M., Stairs, D. G., St-Laurent, M., Ullmann, R., Zacek, G., Tsurugai, T., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Yu. A., Kobrin, V. D., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., van Sighem, A., Tiecke, H., Verkerke, W., Vossebeld, J., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Gilmore, J., Li, C., Ling, T. Y., Nylander, P., Park, I. H., Romanowski, T. A., Bailey, D. S., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J. D., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Zuin, F., Bulmahn, J., Feild, R. G., Oh, B. Y., Whitmore, J. J., D’Agostini, G., Marini, G., Nigro, A., Hart, J. C., McCubbin, N. A., Shah, T. P., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Williams, D. C., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Fleck, J. I., Inuzuka, M., Ishii, T., Kuze, M., Mine, S., Nakao, M., Suzuki, I., Tokushuku, K., Umemori, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Matsushita, T., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Benard, F., Brkic, M., Fagerstroem, C. -P., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sampson, C. R., Simmons, D., Teuscher, R. J., Butterworth, J. M., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Sutton, M. R., Lu, B., Mo, L. W., Bogusz, W., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Coldewey, C., Eisenberg, Y., Hochman, D., Karshon, U., Revel, D., Zer-Zion, D., Badgett, W. F., Breitweg, J., Chapin, D., Cross, R., Dasu, S., Foudas, C., Loveless, R. J., Mattingly, S., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Bhadra, S., Cardy, M. L., Frisken, W. R., Khakzad, M., Murray, W. N., and Schmidke, W. B.
Abstract: Deep inelastic charged-current reactions have been studied ine+pande−pcollisions at a center of mass energy of about 300GeV in the kinematic regionQ2>200GeV2andx>0.006 using the ZEUS detector at HERA. The integrated cross sections forQ2>200GeV2are found to be and . Differential cross sections have been measured as functions of the variablesx, yandQ2. From the measured differential cross sectionsdσ/dQ2, theWboson mass is determined to be . Measured jet rates and transverse energy profiles agree with model predictions. A search for charged-current interactions with a large rapidity gap yielded one candidate event, corresponding to a cross section of
Published: 1996
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37. Measurement of elasticρ0photoproduction at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, T., Zamora Garcia, Y., Zichichi, A., Bargende, B., Bornheim, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Hilger, E., Jakob, H. -P., Katz, U. F., Mengel, S., Mollen, J., Paul, E., Pfeiffer, M., Rembser, Ch., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, H. F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O’Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarębska, E., Suszycki, L., Zając, J., Kotański, A., Przybycień, M., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D. J., Glasman, C., Göttlicher, P., Große-Knetter, J., Gutjahr, B., Haas, T., Hain, W., Hasell, D., Heßling, H., Iga, Y., Johnson, K., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voß, T., Westphal, D., Wolf, G., Youngman, C., Zeuner, W., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mattingly, M. C. K., Mari, S. M., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Söldner-Rembold, S., Schroeder, J., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Bruemmer, N., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. Y. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Fernandez, J. P., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Trocóniz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., St.Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Yu A., Kobrin, V. D., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu, Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Gilmore, J., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Nylander, P., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J. D., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D’Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, W., Rahn, J. T., Sadrozinski, H. F. W., Seiden, A., Williams, D. C., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Fleck, J. I., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Bandyopadhyay, D., Benard, F., Brkic, M., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchuła, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. -P., Frisken, W. R., Furutani, K. M., Khakzad, M., and Schmidke, W. B.
Abstract: Elasticρ0photoproduction has been measured using the ZEUS detector at HERA. Untagged photoproduction events fromepinteractions were used to measure the reactionγp→ρ0p(ρ0)→π+π−) at photon-proton centre-of-mass energies between 60 and 80 GeV and |t|<0.5 GeV2, wheretis the square of the four-momentum transferred at the proton vertex. The differential cross sectiondσ/dMππwhereMππis the invariant mass of the two pions, and the integrated cross section, σγp→ϱ0ϱ, are presented; the latter was measured to be 14.7±0.4 (stat.) ±2.4 (syst.)μb. The differential cross sectiondσ/dthas an approximately exponential shape; a fit of the typeAt′exp(−bt′|t|+ct′t2) yields at-slopebt′=9.9±1.2 (stat.) ±1.4 (syst.) GeV−2. The results, when compared to low energy data, show a weak energy dependence of both σγp→ϱ0pand of thet-slope. Theρ0is produced predominantly with transverse polarisation, demostrating thats-channel helicity conservation holds at these energies.
Published: 1995
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38. Measurement of the proton structure functionF2at lowxand lowQ2at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bornheim, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H. -P., Katz, U. F., Mengel, S., Mollen, J., Paul, E., Pfeiffer, M., Rembser, Ch., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Cottingham, W. N., Dyce, N., Foster, B., George, S., Hayes, M. E., Heath, G. P., Heath, H. F., Morgado, C. J. S., O’Mara, J. A., Piccioni, D., Roff, D. G., Tapper, R. J., Yoshida, R., Rau, R. R., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zarcebska, E., Suszycki, L., Zając, J., Kotański, A., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D. J., Glasman, C., Göttlicher, P., Große-Knetter, J., Gutjahr, B., Haas, T., Hain, W., Hasell, D., Heßling, H., Iga, Y., Johnson, K. F., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voß, T., Westphal, D., Wolf, G., Youngman, C., Zeuner, W., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mari, S. M., Mattingly, M. C. K., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Gallo, E., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Söldner-Rembold, S., Schroeder, J., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Bruemmer, N., Butterworth, I., Harris, V. L., Hung, B. Y. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Fernandez, J. P., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Trocóniz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., St.Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Yu A., Kobrin, V. D., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu, Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Gilmore, J., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Nylander, P., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J. D., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Okrasinski, J. R., Whitmore, J. J., D’Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Williams, D. C., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Händel-Pikielny, C., Levy, A., Fleck, J. I., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Bandyopadhyay, D., Benard, F., Brkic, M., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchuła, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. -P., Frisken, W. R., Furutani, K. M., Khakzad, M., Murray, W. N., and Schmidke, W. B.
Abstract: We report on a measurement of the proton structure functionF2in the range 3.5×10−5≤x≤4×10−3and 1.5 GeV2≤Q2≤15GeV2at theepcollider HERA operating at a centre-of-mass energy of √s=300GeV. The rise ofF2with decreasingxobserved in the previous HERA measurements persists in this lowerxandQ2range. TheQ2evolution ofF2, even at the lowestQ2andxmeasured, is consistent with perturbative QCD.
Published: 1995
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39. Particle distribution in 3-jet events produced bye−e−-annihilation

Author: Bartel, W., Becker, L., Bowdery, C., Cords, D., Eichler, R., Felst, R., Haidt, D., Krehbiel, H., Naroska, B., Olsson, J., Steffen, P., Warming, P., Dietrich, G., Elsen, E., Heinzelmann, G., Kado, H., Meier, K., Petersen, A., Schneekloth, U., Weber, G., Bethke, S., Dieckmann, A., Heintze, J., Hellenbrand, K. H., Heuer, R. D., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Bell, A., Finch, A., Foster, F., Hughes, G., Nozaki, T., Wriedt, H., Allison, J., Baines, J., Ball, A. H., Barlow, R. J., Chrin, J., Duerdoth, I. P., Glendinning, I., Loebinger, F. K., Macbeth, A. A., McCann, H., Mills, H. E., Murphy, P. G., Rowe, P. G., Stephens, K., Clarke, D., Marshall, R., Pearce, G. F., Whittaker, J. B., Kanzaki, J., Kawamoto, T., Kobayashi, T., Koshiba, M., Minowa, M., Nozaki, M., Odaka, S., Orito, S., Sato, A., Takeda, H., Takeshita, T., Totsuka, Y., and Yamada, S.
Abstract: We have studied the distribution of particles within and between jets of 3-jet final states produced in the reactione+e-?hadrons at c.m. energies of 22 GeV and 29–36.4 GeV. The lowest energy jet shows distributions of transverse momenta, particle flow, and energy flow which differ significantly from those of the other two jets and from jets of 2-jet events atEcm=14 GeV. First order QCD calculations with subsequent fragmentation of quarks and gluons into hadrons indicate that the lowest energy jet has the largest probability of originating from a gluon. To reproduce the observed differences in an independent parton fragmentation model, the secondary quarks of a gluon jet have to have higher transverse momenta and lower parallel momenta than those of a quark jet. The particle densities between the jets as well as the correlation of transverse and longitudinal momenta of the particles within the jets favour models with fragmentation along the colour axes.
Published: 1983
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40. Determination of semi-muonic branching ratios and fragmentation functions of heavy quarks ine+e− annihilation at <img src="/fulltext-image.asp?format=htmlnonpaginated&src=PM52NRV3THVG7528_html\10052_2005_Article_BF

Author: Bartel, W., Becker, L., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Steffen, P., Greenshaw, T., Hagemann, J., Heinzelmann, G., Kado, H., Kleinwort, C., Kuhlen, M., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Elsen, E., Heintze, J., Hellenbrand, K. -H., Komamiya, S., von Krogh, J., Rieseberg, H., v. d. Schmitt, H., Smolik, L., Spitzer, J., Wagner, A., Zimmer, M., Bowdery, C. K., Finch, A. J., Foster, F., Hughes, G., Nye, J. M., Walker, I. W., Allison, J., Barlow, R. J., Chrin, J., Duerdoth, I. P., Loebinger, F. K., Macbeth, A. A., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Hill, P., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Kawagoe, K., Mashimo, T., Takeshita, T., and Yamada, S.
Abstract: Muon inclusive multihadronic final states ine+e− annihilation at =34.6 GeV, collected by the JADE detector at PETRA, have been analysed in terms of the semi-muonic branching ratios and fragmentation functions of heavy quarks. Defining the fragmentation variable, ζ, as we find c>=(77±3±5)% and b>=(86±4±5)%. The corresponding semi-muonic branching ratios are measured to be BR(c→μvμX)=7.8±1.5±2)% and BR (b→μvμX)=(11.7±1.6±1.5)%. Defining ζ as we observe an expected softening effect in the fragmentation due mainly to gluon emission, but find that this definition leads to semi-muonic branching ratiomeasurements which are strongly affected by uncertainties in the fragmentation process and the WCD calculation.
Published: 1987
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41. Dijet cross sections in photoproduction at HERA

Author: Breitweg, J., Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Yoshida, R., Zhang, H., Mattingly, M. C. K., Anselmo, F., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Romeo, G. Cara, Castellini, G., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., De Pasquale, S., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Pesci, A., Polini, A., Ricci, F., Sartorelli, G., Zamora Garcia, Y., Zichichi, A., Amelung, C., Bornheim, A., Brock, I., Coböken, K., Crittenden, J., Deffner, R., Eckert, M., Feld, L., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H. -P., Katz, U. F., Kerger, R., Paul, E., Pfeiffer, M., Rembser, Ch., Stamm, J., Wedemeyers, R., Wieber, H., Bailey, D. S., Campbell-Robson, S., Cottingham, W. N., Foster, B., Hall-Wilton, R., Hayes, M. E., Heath, G. P., Heath, H. F., McFall, J. D., Piccioni, D., Roff, D. G., Tapper, R. J., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Kim, J. Y., Lee, J. H., Lim, I. T., Pac, M. Y., Caldwell, A., Cartiglia, N., Jing, Z., Liu, W., Mellado, B., Parsons, J. A., Ritz, S., Sampson, S., Sciulli, F., Straub, P. B., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Figiel, J., Klimek, K., Przybycień, M. B., Zawiejski, L., Adamczyk, L., Bednarek, B., Bukowy, M., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zareebska, E., Suszycki, L., Zajac, J., Duliński, Z., Kotański, A., Abbiendi, G., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Cases, G., Deppe, O., Desler, K., Drews, G., Fricke, U., Gilkinson, D. J., Glasman, C., Göttlicher, P., Haas, T., Hain, W., Hasell, D., Johnson, K. F., Kasemann, M., Koch, W., Kötz, U., Kowalski, H., Labs, J., Lindemann, L., Löhr, B., Löwe, M., Mańczak, O., Milewski, J., Monteiro, T., Ng, J. S. T., Notz, D., Ohrenberg, K., Park, I. H., Pellegrino, A., Pelucchi, F., Piotrzkowski, K., Roco, M., Rohde, M., Roldán, J., Ryan, J. J., Savin, A. A., Schneekloth, U., Selonke, F., Surrow, B., Tassi, E., Voß, T., Westphal, D., Wolf, G., Wollmer, U., Youngman, C., Zarnecki, A. F., Zeuner, W., Burow, B. D., Grabosch, H. J., Meyer, A., and Schlenstedt, S.
Abstract: Dijet cross sections are presented using photoproduction data obtained with the ZEUS detector during 1994. These measurements represent an extension of previous results, as the higher statistics allow cross sections to be measured at higher jet transverse energy (Etjet). Jets are identified in the hadronic final state using three different algorithms, and the cross sections compared to complete next-to-leading order QCD calculations. Agreement with these calculations is seen for the pseudorapidity dependence of the direct photon events with ETjet > 6 GeV and of the resolved photon events with Etjet > 11 GeV. Calculated cross sections for resolved photon processes with 6 GeV < ETjet < 11 GeV lie below the data.
Published: 1979
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42. Measurement of the diffractive structure functionF2D(4) at HERA

Author: Breitweg, J., Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Yoshida, R., Zhang, H., Mattingly, M. C. K., Anselmo, F., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Romeo, G. Cara, Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., De Pasquale, S., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Pesci, A., Polini, A., Ricci, F., Sartorelli, G., Zamora Garcia, Y., Zichichi, A., Amelung, C., Bornheim, A., Brock, I., Coböken, K., Crittenden, J., Deffner, R., Eckert, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H. -P., Katz, U. F., Kerger, R., Paul, E., Pfeiffer, M., Rembser, Ch., Stamm, J., Wedemeyer, R., Wieber, H., Bailey, D. S., Campbell-Robson, S., Cottingham, W. N., Foster, B., Hall-Wilton, R., Hayes, M. E., Heath, G. P., Heath, H. F., McFall, J. D., Piccioni, D., Roff, D. G., Tapper, R. J., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Kim, J. Y., Lee, J. H., Lim, L. T., Pac, M. Y., Caldwell, A., Cartiglia, N., Jing, Z., Liu, W., Mellado, B., Parsons, J. A., Ritz, S., Sampson, S., Sciulli, F., Straub, P. B., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Figiel, J., Klimek, K., Przybycień, M. B., Zawiejski, L., Adamczyk, L., Bednarek, B., Bukowy, M., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zareebska, E., Suszycki, L., Zajac, J., Duliński, Z., Kotański, A., Abbiendi, G., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Cases, G., Deppe, O., Desler, K., Drews, G., Fricke, U., Gilkinson, D. J., Glasman, C., Göttlicher, P., Haas, T., Hain, W., Hasell, D., Johnson, K. F., Kasemann, M., Koch, W., Kötz, U., Kowalski, H., Labs, J., Lindemann, L., Löhr, B., Löwe, M., Mańczak, O., Milewski, J., Monteiro, T., Ng, J. S. T., Notz, D., Ohrenberg, K., Park, I. H., Pellegrino, A., Pelucchi, F., Piotrzkowski, K., Roco, M., Rohde, M., Roldán, J., Ryan, J. J., Savin, A. A., Schneekloth, U., Selonke, F., Surrow, B., Tassi, E., Voß, T., Westphal, D., Wolf, G., Wollmer, U., Youngman, C., Zarnecki, A. F., Zeuner, W., Burow, B. D., Grabosch, H. J., Meyer, A., Schlenstedt, S., Barbagli, G., Gallo, E., Pelfer, P., Anzivino, G., Maccarrone, G., Votano, L., Barberger, A., Eisenhardt, S., Markun, P., Trefzger, T., Wölfle, S., Bromley, J. T., Brook, N. H., Bussey, P. J., Doyle, A. T., Macdonald, N., Saxon, D. H., Sinclair, L. E., Strickland, E., Waugh, R., Bohnet, I., Gendner, N., Holm, U., Meyer-Larsen, A., Salchi, H., Wick, K., Gladilin, L. K., Horstmann, D., Kçira, D., Klanner, R., Lohrmann, E., Poelz, G., Schott, W., Bacon, T. C., Butterworth, I., Cole, J. E., Howell, G., Hung, B. H. Y., Lamberti, L., Long, K. R., Prinias, A., Sedgbeer, J. K., Sideris, D., Mallik, U., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., Fleck, J. I., Ishii, T., Kuze, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamauchi, K., Yamazaki, Y., Hong, S. J., Lee, S. B., Nam, S. W., Park, S. K., Barreiro, F., Fernández, J. P., García, G., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., Martínez, M., del Peso, J., Puga, J., Terrón, J., de Trocóniz, J. F., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Murray, N., Ochs, A., Riveline, M., Stairs, D. G., St-Laurent, M., Ullmann, R., Tsurugai, T., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Golubkov, Yu. A., Khein, L. A., Korotkova, N. A., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu., Proskuryakov, A. S., Shcheglova, L. M., Solomin, A. N., Zotkin, S. A., Bokel, C., Botje, M., Brummer, N., Chlebana, F., Engelen, J., Koffeman, E., Kooijman, P., van Sighem, A., Tiecke, H., Tuning, N., Verkerke, W., Vossebeld, J., Vreeswijk, M., Wiggers, L., de Wolf, E., Acosta, D., Bylsma, B., Durkin, L. S., Gilmore, J., Ginsburg, C. M., Kim, C. L., Ling, T. Y., Nylander, P., Romanowski, T. A., Blaikley, H. E., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Edmonds, J. K., Große-Knetter, J., Harnew, N., Lancaster, M., Nath, C., Noyes, V. A., Quadt, A., Ruske, O., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Bertolin, A., Bruguera, R., Carlin, R., Dal Corso, F., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Oh, B. Y., Okrasinski, J. R., Toothacker, W. S., Whitmore, J. J., Iga, Y., D'Agostini, G., Marini, G., Nigro, A., Raso, M., Hart, J. C., McCubbin, N. A., Shah, T. P., Barberis, E., Epperson, D., Heusch, C., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Wichmann, R., Williams, D. C., Schwarzer, O., Walenta, A. H., Abramowicz, H., Briskin, G., Dagan, S., Kananov, S., Levy, A., Abe, T., Fusayasu, T., Inuzuka, M., Nagano, K., Umemori, K., Yamashita, T., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Matsushita, T., Cirio, R., Costa, M., Ferrero, M. I., Maselli, S., Monaco, V., Peroni, C., Petrucci, M. C., Ruspa, M., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Fagerstroem, C. -P., Galea, R., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sabetfakhri, A., Simmons, D., Teuscher, R. J., Butterworth, J. M., Catterall, C. D., Jones, T. W., Lane, J. B., Saunders, R. L., Shulman, J., Sutton, M. R., Wing, M., Ciborowski, J., Grzelak, G., Kasprzak, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Pawlak, R., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Adamus, M., Coldewey, C., Eisenberg, Y., Hochman, D., Karshon, U., Badgett, W. F., Chapin, D., Cross, R., Dasu, S., Foudas, C., Loveless, R. J., Mattingly, S., Reeder, D. D., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Bhadra, S., Frisken, W. R., Khakzad, M., and Schmidke, W. B.
Abstract: This paper presents the first analysis of diffractive photon dissociation events in deep inelastic positron-proton scattering at HERA in which the proton in the final state is detected and its momentum measured. The events are selected by requiring a scattered proton in the ZEUS leading proton spectrometer (LPS) with ?L > 0.97, where xL is the fraction of the incoming proton beam momentum carried by the scattered proton. The use of the LPS significantly reduces the contamination from events with diffractive dissociation of the proton into low mass states and allows a direct measurement of t, the square of the four-momentum exchanged at the proton vertex. The dependence of the cross section ont is measured in the interval 0.073 < |t| < 0.4 GeV2 and is found to be described by an exponential shape with the slope parameterb = 7.2 ± 1.1(stat.)-0.9+0.7(syst.) GeV-2. The diffractive structure function FD (4) is presented as 0.9 a function of ?H ? 1 - ?L and ß, the momentum fraction of the struck quark with respect to ?H, and averaged over thet interval 0.073 < |t' < 0.4 GeV2 and the photon virtuality range 5 2 < 20 GeV2. In the kinematic range 4 × 104 < ?p < 0.03 and 0.015 < ß < 0.5, the ?p dependence ofFD(4) is fitted with a form (1/?p)a , yieldinga - 1.00 ± 0.09 (stat.)-0.05+0.11(syst.). Upon integration overL, the structure functionF2D(3) is determined in a kinematic range extending to higher ?p and lower ß compared to our previous analysis; the results are discussed within the framework of Regge theory.
Published: 1979
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43. Measurement of the processese+e−→e+e− ande+e−→γγ at PETRA

Author: Bartel, W., Becker, L., Bowdery, C., Cords, D., Eichler, R., Felst, R., Haidt, D., Krehbiel, H., Naroska, B., Olsson, J., Steffen, P., Warming, P., Dietrich, G., Elsen, E., Heinzelmann, G., Kado, H., Meier, K., Petersen, A., Schneekloth, U., Weber, G., Bethke, S., Dieckmann, A., Heintze, J., Hellenbrand, K. H., Heuer, R. D., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Wagner, A., Bell, A., Finch, A., Foster, F., Hughes, G., Nozaki, T., Wriedt, H., Allison, J., Ball, A. H., Bamford, G., Barlow, R., Duerdoth, I. P., Glendinning, I., Loebinger, F. K., Macbeth, A. A., McCann, H., Mills, H. E., Murphy, P. G., Rowe, P., Stephens, K., Clarke, D., Marshall, R., Pearce, G. F., Whittaker, J. B., Kanzaki, J., Kawamoto, T., Kobayashi, T., Koshiba, M., Minowa, M., Nozaki, M., Odaka, S., Orito, S., Sato, A., Takeda, H., Takeshita, T., Totsuka, Y., Watanabe, Y., Yamada, S., and Yanagisawa, C.
Abstract: Cross sections for the reactionse+e−→e+e− (Bhabha scattering) ande+e−→γγ are measured for center-of-mass (c.m.) energies between 12.0 and 34.6 GeV. The results agree with the predictions of Quantum Electrodynamics (QED) and the cut-off parameters are determined. From Bhabha scattering at the highest energy, , the 1 δ limits 0.122 ϑw<0.38 are obtained for the weak mixing angle. The higher order (α3) QED processese+e−→e+e−γ ande+e−→γγγ are also studied and are found to agree with the α3 QED predictions. A search for excited electrons is carried out by investigating the (e±γ) invariant mass distribution in the reactione+e−→e+e−γ.
Published: 1983
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44. Inclusive charged particle distributions in deep inelastic scattering events at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Romeo, G. Cara, Castellini, G., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Polini, A., Sartorelli, G., Garcia, Y. Zamora, Zichichi, A., Bornheim, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H. -P., Katz, U. F., Mengel, S., Mollen, J., Paul, E., Pfeiffer, M., Rembser, Ch., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Cottingham, W. N., Dyce, N., Foster, B., George, S., Hayes, M. E., Heath, G. P., Heath, H. F., Morgado, C. J. S., O’Mara, J. A., Piccioni, D., Roff, D. G., Tapper, R. J., Yoshida, R., Rau, R. R., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zarębska, E., Suszycki, L., Zajac, J., Kotański, A., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasiński, M., Gilkinson, D. J., Glasman, C., Göttlicher, P., Große-Knetter, J., Gutjahr, B., Haas, T., Hain, W., Hasell, D., Heßling, H., Iga, Y., Johnson, K. F., Joos, P., Kasemann, M., Klanner, R., Koch, W., Köpke, L., Kötz, U., Kowalski, H., Labs, J., Ladage, A., Löhr, B., Löwe, M., Lüke, D., Mainusch, J., Mańczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldán, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voß, T., Westphal, D., Wolf, G., Youngman, C., Zeuner, W., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mari, S. M., Mattingly, M. C. K., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Gallo, E., Pelfer, P., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Söldner-Rembold, S., Schroeder, J., Trefzger, T., Bromley, J. T., Brook, N. H., Bussey, P. J., Doyle, A. T., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Bruemmer, N., Butterworth, I., Harris, V. L., Hung, B. Y. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., An, S. H., Cho, G. H., Ko, B. J., Lee, S. B., Nam, S. W., Park, H. S., Park, S. K., Imlay, R., Kartik, S., Kim, H. -J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Fernandez, J. P., Graciani, R., Hernández, J. M., Hervás, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Trocóniz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., fnLaurent, M. St., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Yu. A., Kobrin, V. D., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Gilmore, J., Honscheid, K., Li, C., Ling, T. Y., Mclean, K. W., Nylander, P., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Byrne, A., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J. D., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Okrasinski, J. R., Whitmore, J. J., D’Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, W., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Williams, D. C., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, G., Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Fleck, J. I., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Benard, F., Brkic, M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sampson, C. R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchuła, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyżanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Żarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. -P., Frisken, W. R., Khakzad, M., Murray, W. N., and Schmidke, W. B.
Abstract: A measurement of inclusive charged particle distributions in deep inelasticepscattering forγ*pcentre-of-mass energies 75
Published: 1996
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45. Experimental investigation of the energy dependence of the strong coupling strength

Author: Bethke, S., Allison, J., Ambrus, K., Barlow, R.J., Bartel, W., Bowdery, C.K., Cartwright, S.L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I.P., Eckerlin, G., Elsen, E., Felst, R., Finch, A.J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., Heintze, J., Heinzelmann, G., Hellenbrand, K.H., Hill, P., Hughes, G., Kado, H., Kawagoe, K., Kleinwort, C., Knies, G., Kobayashi, T., Komamiya, S., Krehbiel, H., von Krogh, J., Kuhlen, M., Loebinger, F.K., Macbeth, A.A., Magnussen, N., Marshall, R., Meinke, R., Middleton, R.P., Minowa, M., Murphy, P.G., Naroska, B., Nye, J.M., Olsson, J., Ould-Saada, F., Petersen, A., Ramcke, R., Rieseberg, H., Schmidt, D., Schmitt, H.vd., Smolik, L., Schneekloth, U., Skard, J.A.J., Spitzer, J., Steffen, P., Stephens, K., Wagner, A., Walker, I.W., Warming, P., Weber, G., Zimmer, M., and Zorn, G.T.
Abstract: The energy dependence of the relative production rate of three-jet events is studied in hadronic e+e−annihilation events at center of mass energies between 22 and 46.7 GeV. Three-jet events are defined by a jet finding algorithm which is closely related to the definition of resolvable jets used in O(αs2) perturbative QCD calculations, where the relative production rate of three-jet events is roughly proportional to the size of the strong coupling strength. The production rates of three-jet events in the data decrease significantly with increasing centre of mass energy. The experimental rates, which are independent of fragmentation model calculations, can be directly compared to theoretically calculated jet production rates and are in good agreement with the QCD expectations of a running coupling strength. The hypothesis of an energy independent coupling constant can be excluded with a significance of four standard derivations.
Published: 1988
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46. Determination of theB lifetime

Author: Bartel, W., Becker, L., Cords, D., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Steffen, P., Dietrich, G., Hagemann, J., Heinzelmann, G., Kado, H., Kawagoe, K., Kleinwort, C., Kuhlen, M., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Elsen, E., Heintze, J., Hellenbrand, K. H., Komamiya, S., von Krogh, J., Lannert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Bowdery, C., Finch, A., Foster, F., Hughes, G., Nye, J., Allison, J., Ball, A. H., Barlow, R. J., Chrin, J., Duerdoth, I. P., Greenshaw, T., Hill, P., Loebinger, F. K., Macbeth, A. A., McCann, H., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Kawamoto, T., Kobayashi, T., Takeda, H., Takeshita, T., and Yamada, S.
Abstract: We have determined the lifetime ofB-hadrons produced ine+e- annihilation into multihadronic final states, by measuring the impact parameter of the track with respect to the centre of the interaction region. Two different analyses of the data were performed and gave compatible results. The lifetime is tB=1.8-0.4+0.5±0.4 ps.
Published: 1986
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47. Radiative τ pair production and search for new particles decaying into τ

Author: Bartel, W., Becker, L., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Steffen, P., Dietrich, G., Hagemann, J., Heinzelmann, G., Kado, H., Kleinwort, C., Kuhlen, M., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Elsen, E., Heintze, J., Hellenbrand, K. -H., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Bowdery, C. K., Finch, A. J., Foster, F., Hughes, G., Nye, J. M., Allison, J., Barlow, R. J., Chrin, J., Duerdoth, I. P., Greenshaw, T., Loebinger, F. K., Macbeth, A. A., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Hill, P., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Kawagoe, K., Mashimo, T., Takeshita, T., and Yamada, S.
Abstract: A study of radiative t pair production,e+e-?t+t-? ande+e-?t+t-??, is presented. The observed events agree with QED predictions of order a3 and a4. Excited t's have been searched for and lower limits on single and pair production are obtained. For QED-like coupling the t* mass is limited to values greater than 40 GeV (95% CL). A search for unstable charged scalars (S±) decaying into t, e.g. charged Higgs, technipions or the supersymmetric partners of t's, yields no evidence for such particles. Assuming a branching fraction ofB(S?t?)=1,S masses up to 18.7 GeV are excluded with 95% CL.
Published: 1986
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48. A study of photon production in hadronice+e− annihilation

Author: Bartel, W., Becker, L., Cords, D., Felst, R., Haidt, D., Junge, H., Knies, G., Krehbiel, H., Laurikainen, P., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Steffen, P., Dietrich, G., Hagemann, J., Heinzelmann, G., Kado, H., Kawagoe, K., Kleinwort, C., Kuhlen, M., Meier, K., Petersen, A., Ramcke, R., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Elsen, E., Heintze, J., Hellenbrand, K. H., Komamiya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Bowdery, C., Finch, A., Foster, F., Hughes, G., Nozaki, T., Nye, J., Allison, J., Ball, A. H., Barlow, R. J., Chrin, J., Duerdoth, I. P., Greenshaw, T., Hill, P., Loebinger, F. K., Macbeth, A. A., Mills, H. E., Murphy, P. G., Stephens, K., Warming, P., Glasser, R. G., Sechi-Zorn, B., Skard, J. A. J., Wagner, S. R., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Middleton, R. P., Whittaker, J. B., Kawamoto, T., Kobayashi, T., Mashimo, T., Minowa, M., Takeda, H., Takeshita, T., and Yamada, S.
Abstract: The production of photons ine+e-??+hadrons is investigated at three centre of mass energies around 14, 22 and 34 GeV. On average, photons carry 25% of the total available energy, with a multiplicity similar to the charged multiplicity. The inclusive photon spectra are found to scale with the centre of mass energy as a function of the Feynman variablex. p0 and ? mesons are reconstructed from their decay photons. The slopes of the spectra are similar to that for charged pions and approximate scaling is observed for p0 production. The mean p0 and ? multiplicities are given. The observed photon yield can be fully accounted for by hadron decays and initial state radiation. However, up to one extra photon per event from other sources cannot be excluded.
Published: 1985
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49. Measurements of energy correlations ine+e−→hadrons

Author: Bartel, W., Becker, L., Bowdery, C., Cords, D., Felst, R., Haidt, D., Junge, H., Knies, G., Krehbiel, H., Laurikainen, P., Meinke, R., Meissner, K., Naroska, B., Olsson, J., Pietarinen, E., Schmidt, D., Steffen, P., Warming, P., Zachara, M., Dietrich, G., Elsen, E., Heinzelmann, G., Kado, H., Kuhlen, M., Mashimo, T., Meier, K., Petersen, A., Schneekloth, U., Weber, G., Ambrus, K., Bethke, S., Dieckmann, A., Heintze, J., Hellenbrand, K. H., Heuer, R. D., Komaniya, S., von Krogh, J., Lennert, P., Matsumura, H., Rieseberg, H., Spitzer, J., Wagner, A., Finch, A., Foster, F., Hughes, G., Nozaki, T., Nye, J., Allison, J., Baines, J., Ball, A. H., Barlow, R. J., Chrin, J., Duerdoth, I. P., Greenshaw, T., Hill, P., Loebinger, F. K., Macbeth, A. A., McCann, H., Mills, H. E., Murphy, P. G., Stephens, K., Glasser, R. G., Sechi-Zorn, B., Skard, J. A. J., Wagner, S., Zorn, G. T., Cartwright, S. L., Clarke, D., Marshall, R., Whittaker, J. B., Kanzaki, J., Kawamoto, T., Kobayashi, T., Koshiba, M., Minowa, M., Nozaki, M., Orito, S., Sato, A., Takeda, H., Takeshita, T., Totsuka, Y., and Yamada, S.
Abstract: Energy-energy-correlations (EEC) have been measured with the JADE detector at c.m. energies of 14 GeV, 22 GeV and in the region 29 GeVcm<36 GeV. Corrected results are presented of EEC and their asymmetry, which can be directly compared to theoretical predictions. At 〈Ecm〉=34 GeV a comparison with second order QCD predictions yields good agreement for the string model fragmentation resulting in a value of the strong coupling constant αs=0.165±0.01 (stat.). The independent fragmentation models, which yield values of αs between 0.10 and 0.15 depending on the treatment of energy and momentum conservation and of the gluon splitting, do not provide a satisfactory description of the data over the full angular range.
Published: 1984
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50. Diffractive dijet cross sections in photoproduction at HERA

Author: Breitweg, J., Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Yoshida, R., Zhang, H., Mattingly, M. C. K., Anselmo, F., Antonioli, P., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Romeo, G. Cara, 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. Zamora, Zichichi, A., Amelung, C., Bornheim, A., Brock, I., Coböken, K., Crittenden, J., Deffner, R., Eckert, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H. -P., Kappes, A., Katz, U. F., Kerger, R., Paul, E., Pfeiffer, M., Stamm, J., Wieber, H., Bailey, D. S., Campbell-Robson, S., Cottingham, W. N., Foster, B., Hall-Wilton, R., Heath, G. P., Heath, H. F., McFall, J. D., Piccioni, D., Roff, D. G., Tapper, R. J., Ayad, R., Capua, M., Iannotti, L., Schioppa, M., Susinno, G., Kim, J. Y., Lee, J. H., Lim, I. T., Pac, M. Y., Caldwell, A., Cartiglia, N., Jing, Z., Liu, W., Mellado, B., Parsons, J. A., Ritz, S., Sampson, S., Sciulli, F., Straub, P. B., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Figiel, J., Klimek, K., Przybycień, M. B., Zawiejski, L., Adamczyk, L., Bednarek, B., Bukowy, M., Czermak, A. M., Jeleń, K., Kisielewska, D., Kowalski, T., Przybycień, M., Rulikowska-Zarbska, E., Suszycki, L., Zajc, J., Duliński, Z., Kotański, A., Abbiendi, G., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Desler, K., Drews, G., Fricke, U., Gialas, I., Goebel, F., Göttlicher, P., Graciani, R., Haas, T., Hain, W., Hasell, D., Hebbel, K., Johnson, K. F., Kasemann, M., Koch, W., Kötz, U., Kowalski, H., Lindemann, L., Löhr, B., Milewski, J., Milite, M., Monteiro, T., Ng, J. S. T., Notz, D., Park, I. H., Pellegrino, A., Pelucchi, F., Piotrzkowski, K., Rohde, M., Roldán, J., Ryan, J. J., Savin, A. A., Schneekloth, U., Schwarzer, O., Selonke, F., Stonjek, S., Surrow, B., Tassi, E., Westphal, D., Wolf, G., Wollmer, U., Youngman, C., Zeuner, W., Burow, B. D., Coldewey, C., Grabosch, H. J., Meyer, A., Schlenstedt, S., Barbagli, G., Gallo, E., Pelfer, P., Maccarrone, G., Votano, L., Bamberger, A., Eisenhardt, S., Markun, P., Raach, H., Trefzger, T., Wölfle, S., Bromley, J. T., Brook, N. H., Bussey, P. J., Doyle, A. T., Macdonald, N., Saxon, D. H., Sinclair, L. E., Skillicorn, I. O., Strickland, E., Waugh, R., Bohnet, I., Gendner, N., Holm, U., Meyer-Larsen, A., Salehi, H., Wick, K., Garfagnini, A., Gladilin, L. K., Horstmann, D., Kçira, D., Klanner, R., Lohrmann, E., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Butterworth, I., Cole, J. E., Howell, G., Lamberti, L., Long, K. R., Miller, D. B., Pavel, N., Prinias, A., Sedgbeer, J. K., Sideris, D., Walker, R., Mallik, U., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., Fleck, J. I., Ishii, T., Kuze, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamauchi, K., Yamazaki, Y., Hong, S. J., Lee, S. B., Nam, S. W., Park, S. K., Barreiro, F., Fernández, J. P., García, G., Glasman, C., Hernández, J. M., Hervás, L., Labarga, L., Martínez, M., Peso, J. del, Puga, J., Terrón, J., Trocóniz, J. F. de, Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Murray, W. N., Ochs, A., Riveline, M., Stairs, D. G., St-Laurent, M., Ullmann, R., Tsurugai, T., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagyan, G. L., Ermolov, P. F., Golubkov, Yu. A., Khein, L. A., Korotkova, N. A., Korzhavina, I. A., Kuzinin, V. A., Lukina, O. Yu., Proskuryakov, A. S., Shcheglova, L. M., Solomin, A. N., Zotkin, S. A., Bokel, C., Botje, M., Brümmer, N., Engelen, J., Koffeman, E., Kooijman, P., van Sighem, A., Tiecke, H., Tuning, N., Verkerke, W., Vossebeld, J., Wiggers, L., Wolf, E. de, Acosta, D., Bylsma, B., Durkin, L. S., Gilmore, J., Ginsburg, C. M., Kim, C. L., Ling, T. Y., Nylander, P., Romanowski, T. A., Blaikley, H. E., Cashmore, R. J., Cooper-Sarkar, A. M., Devenish, R. C. E., Edmonds, J. K., Große-Knetter, J., Harnew, N., Nath, C., Noyes, V. A., Quadt, A., Ruske, O., Tickner, J. R., Walczak, R., Waters, D. S., Bertolin, A., Brugnera, R., Carlin, R., Corso, F. Dal, Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Oh, B. Y., Okrasiński, J. R., Toothacker, W. S., Whitmore, J. J., Iga, Y., D’Agostini, G., Marini, G., Nigro, A., Raso, M., Hart, J. C., McCubbin, N. A., Shah, T. P., Epperson, D., Heusch, C., Rahn, J. T., Sadrozinski, H. F. -W., Seiden, A., Wichmann, R., Williams, D. C., Abramowicz, H., Briskin, G., Dagan, S., Kananov, S., Levy, A., Abe, T., Fusayasu, T., Inuzuka, M., Nagano, K., Umemori, K., Yamashita, T., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Matsushita, T., Arneodo, M., Cirio, R., Costa, M., Ferrero, M. I., Maselli, S., Monaco, V., Peroni, C., Petrucci, M. C., Ruspa, M., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, D. C., Fagerstroem, C. -P., Galea, R., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sabetfakhri, A., Simmons, D., Teuscher, R. J., Butterworth, J. M., Catterall, C. D., Hayes, M. E., Jones, T. W., Lane, J. B., Saunders, R. L., Sutton, M. R., Wing, M., Ciborowski, J., Grzelak, G., Kasprzak, M., Nowak, R. J., Pawlak, J. M., Pawlak, R., Tymieniecka, T., Wróblewski, A. K., Zakrzewski, J. A., Zarnecki, A. F., Adamus, M., Deppe, O., Eisenberg, Y., Hochman, D., Karshon, U., Badgett, W. F., Chapin, D., Cross, R., Dasu, S., Foudas, C., Loveless, R. J., Mattingly, S., Reeder, D. D., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Deshpande, A., Dhawan, S., Hughes, V. W., Bhadra, S., Frisken, W. R., Khakzad, M., and Schmidke, W. B.
Abstract: Differential dijet cross sections have been measured with the ZEUS detector for photoproduction events in which the hadronic final state containing the jets is separated with respect to the outgoing proton direction by a large rapidity gap. The cross section has been measured as a function of the fraction of the photon (ϰγOBS) and pomeron (βOBS) momentum participating in the production of the dijet system. The observed ϰγOBSdependence shows evidence for the presence of a resolved- as well as a direct-photon component. The measured cross section da/dβOBSincreases as βOBSincreases indicating that there is a sizeable contribution to dijet production from those events in which a large fraction of the pomeron momentum participates in the hard scattering. These cross sections and the ZEUS measurements of the diffractive structure function can be described by calculations based on parton densities in the pomeron which evolve according to the QCD evolution equations and include a substantial hard momentum component of gluons in the pomeron.
Published: 1998
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