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1. Differential cross sections of D*(+/-) photoproduction in ep collisions at HERA

Author

J. Breitweg, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R.L. Talaga, R. Yoshida, H. Zhang, M.C.K. Mattingly, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, S. De Pasquale, A. Pesci, A. Polini, G. Sartorelli, Y. Zamora Garcia, A. Zichichi, C. Amelung, A. Bornheim, I. Brock, K. Coböken, J. Crittenden, R. Deffner, M. Eckert, L. Feld, M. Grothe, H. Hartmann, K. Heinloth, L. Heinz, E. Hilger, H.-P. Jakob, U.F. Katz, E. Paul, M. Pfeiffer, Ch. Rembser, J. Stamm, R. Wedemeyer, D.S. Bailey, S. Campbell-Robson, W.N. Cottingham, B. Foster, R. Hall-Wilton, M.E. Hayes, G.P. Heath, H.F. Heath, D. Piccioni, D.G. Roff, R.J. Tapper, M. Arneodo, R. Ayad, M. Capua, A. Garfagnini, L. Iannotti, M. Schioppa, G. Susinno, J.Y. Kim, J.H. Lee, I.T. Lim, M.Y. Pac, A. Caldwell, N. Cartiglia, Z. Jing, W. Liu, J.A. Parsons, S. Ritz, S. Sampson, F. Sciulli, P.B. Straub, Q. Zhu, P. Borzemski, J. Chwastowski, A. Eskreys, Z. Jakubowski, M.B. Przybycień, M. Zachara, L. Zawiejski, L. Adamczyk, B. Bednarek, K. Jeleń, D. Kisielewska, T. Kowalski, M. Przybycień, E. Rulikowska-Zarȩbska, L. Suszycki, J. Zaja̧c, Z. Duliński, A. Kotański, G. Abbiendi, H. Abramowicz, L.A.T. Bauerdick, U. Behrens, H. Beier, J.K. Bienlein, G. Cases, O. Deppe, K. Desler, G. Drews, D.J. Gilkinson, C. Glasman, P. Göttlicher, J. Große-Knetter, T. Haas, W. Hain, D. Hasell, H. Heßling, Y. Iga, K.F. Johnson, M. Kasemann, W. Koch, U. Kötz, H. Kowalski, J. Labs, L. Lindemann, B. Löhr, M. Löwe, J. Mainusch, O. Mańczak, J. Milewski, T. Monteiro, J.S.T. Ng, D. Notz, K. Ohrenberg, I.H. Park, A. Pellegrino, F. Pelucchi, K. Piotrzkowski, M. Roco, M. Rohde, J. Roldán, A.A. Savin, U. Schneekloth, W. Schulz, F. Selonke, B. Surrow, E. Tassi, T. Voß, D. Westphal, G. Wolf, U. Wollmer, C. Youngman, A.F. Żarnecki, W. Zeuner, B.D. Burow, H.J. Grabosch, A. Meyer, S. Schlenstedt, G. Barbagli, E. Gallo, P. Pelfer, G. Maccarrone, L. Votano, A. Bamberger, S. Eisenhardt, P. Markun, T. Trefzger, S. Wölfle, J.T. Bromley, N.H. Brook, P.J. Bussey, A.T. Doyle, D.H. Saxon, L.E. Sinclair, E. Strickland, M.L. Utley, R. Waugh, A.S. Wilson, I. Bohnet, N. Gendner, U. Holm, A. Meyer-Larsen, H. Salehi, K. Wick, L.K. Gladilin, R. Klanner, E. Lohrmann, G. Poelz, W. Schott, F. Zetsche, T.C. Bacon, I. Butterworth, J.E. Cole, V.L. Harris, G. Howell, B.H.Y. Hung, L. Lamberti, K.R. Long, D.B. Miller, N. Pavel, A. Prinias, J.K. Sedgbeer, D. Sideris, A.F. Whitfield, U. Mallik, S.M. Wang, J.T. Wu, P. Cloth, D. Filges, S.H. An, S.B. Lee, S.W. Nam, H.S. Park, S.K. Park, F. Barreiro, J.P. Fernandez, R. Graciani, J.M. Hernández, L. Hervás, L. Labarga, M. Martinez, J. del Peso, J. Puga, J. Terron, J.F. de Trocóniz, F. Corriveau, D.S. Hanna, J. Hartmann, L.W. Hung, J.N. Lim, W.N. Murray, A. Ochs, M. Riveline, D.G. Stairs, M. St-Laurent, R. Ullmann, T. Tsurugai, V. Bashkirov, B.A. Dolgoshein, A. Stifutkin, G.L. Bashindzhagyan, P.F. Ermolov, Yu.A. Golubkov, V.D. Kobrin, I.A. Korzhavina, V.A. Kuzmin, O.Yu. Lukina, A.S. Proskuryakov, L.M. Shcheglova, A.N. Solomin, N.P. Zotov, C. Bokel, M. Botje, N. Brümmer, F. Chlebana, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, A. van Sighem, H. Tiecke, W. Verkerke, J. Vossebeld, M. Vreeswijk, L. Wiggers, E. de Wolf, D. Acosta, B. Bylsma, L.S. Durkin, J. Gilmore, C.M. Ginsburg, C.L. Kim, T.Y. Ling, P. Nylander, T.A. Romanowski, H.E. Blaikley, R.J. Cashmore, A.M. Cooper-Sarkar, R.C.E. Devenish, J.K. Edmonds, N. Harnew, M. Lancaster, J.D. McFall, C. Nath, V.A. Noyes, A. Quadt, J.R. Tickner, H. Uijterwaal, R. Walczak, D.S. Waters, T. Yip, A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, J. Bulmahn, R.G. Feild, B.Y. Oh, J.R. Okrasiński, J.J. Whitmore, G. D'Agostini, G. Marini, A. Nigro, J.C. Hart, N.A. McCubbin, T.P. Shah, E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, W. Lockman, J.T. Rahn, H.F.-W. Sadrozinski, A. Seiden, D.C. Williams, O. Schwarzer, A.H. Walenta, G. Briskin, S. Dagan, T. Doeker, A. Levy, T. Abe, J.I. Fleck, M. Inuzuka, T. Ishii, M. Kuze, K. Nagano, M. Nakao, I. Suzuki, K. Tokushuku, K. Umemori, S. Yamada, Y. Yamazaki, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura, T. Matsushita, K. Yamauchi, R. Cirio, M. Costa, M.I. Ferrero, S. Maselli, V. Monaco, C. Peroni, M.C. Petrucci, R. Sacchi, A. Solano, A. Staiano, M. Dardo, D.C. Bailey, M. Brkic, C.-P. Fagerstroem, G.F. Hartner, K.K. Joo, G.M. Levman, J.F. Martin, R.S. Orr, S. Polenz, C.R. Sampson, D. Simmons, R.J. Teuscher, J.M. Butterworth, C.D. Catterall, T.W. Jones, P.B. Kaziewicz, J.B. Lane, R.L. Saunders, J. Shulman, M.R. Sutton, B. Lu, L.W. Mo, J. Ciborowski, G. Grzelak, M. Kasprzak, K. Muchorowski, R.J. Nowak, J.M. Pawlak, R. Pawlak, T. Tymieniecka, A.K. Wróblewski, J.A. Zakrzewski, M. Adamus, C. Coldewey, Y. Eisenberg, D. Hochman, U. Karshon, D. Revel, D. Zer-Zion, W.F. Badgett, D. Chapin, R. Cross, S. Dasu, C. Foudas, R.J. Loveless, S. Mattingly, D.D. Reeder, W.H. Smith, A. Vaiciulis, M. Wodarczyk, S. Bhadra, W.R. Frisken, M. Khakzad, W.B. Schmidke, and Zeus (IHEF, IoP, FNWI)

Subjects
Nuclear and High Energy Physics, Particle physics, Photon, E+E ANNIHILATION, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, DISTRIBUTIONS, 010306 general physics, Nuclear Experiment, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Perturbative QCD, FLAVOR PRODUCTION, ZEUS, ZEUS BARREL CALORIMETER, HERA, CENTRAL TRACKING DETECTOR, Massless particle, PHOTON, HEAVY-QUARK CORRELATIONS, HADRON-COLLISIONS, QCD CORRECTIONS, FRAGMENTATION, High Energy Physics::Experiment
Abstract

Inclusive photoproduction of D*+- in ep collisions at HERA has been measured with the ZEUS detector for photon-proton centre of mass energies in the range 115 < W < 280 GeV and photon virtuality Q**2 < 4 GeV**2. The cross section sigma(ep --> D*X) integrated over the kinematic region pt(D*) > 3 GeV and -1.5 < eta(D*) < 1.0 is (10.6+-1.7(stat.)+1.6(syst.)-1.3(syst.)) nb. Differential cross sections as functions of pt(D*), eta(D*) and W are given. The data are compared with two next-to-leading order perturbative QCD predictions. For a calculation using a massive charm scheme the predicted cross sections are smaller than the measured ones. A recent calculation using a massless charm scheme is in agreement with the data., 18 pages including 4 figures

Published
2016

2. Plant tests of an on-line multiple-pipe pulverised coal mass flow measuring system

Author

J.R Tickner, M.J. Millen, B.D. Sowerby, C Grima, Peter Coghill, and R Kingsley

Subjects
Power station, Fouling, business.industry, System of measurement, Mass flow, Nuclear engineering, Boiler (power generation), Combustion, Flow measurement, Computer Science Applications, Modeling and Simulation, Environmental science, Coal, Electrical and Electronic Engineering, business, Instrumentation
Abstract

The CSIRO Division of Minerals has developed and successfully plant-tested a commercial prototype pulverised fuel (PF) mass flow measurement system on all four boiler feed lines from a single pulverising mill at Bayswater power station, in the Hunter Valley, NSW, Australia. The CSIRO PF mass flow measurement system utilises measurements of the attenuation and velocity of pulsed beams of 60 kHz ultrasound transmitted across the boiler pipes to determine the PF mass flow in each pipe. The system is used to detect non-uniform distribution of PF between boiler feed pipes. Using this information to balance the burners would lead to improved uniformity of combustion with the benefits of improved combustion efficiency, improved control of NOx emissions, reduced boiler tube erosion and reduced fouling and slagging. During calibration of the mass flow measurement system, PF was measured in the range 3.4–5.9% relative in individual pipes when compared with a beta-ray transmission gauge. A comparison of the mill gravimetric coal feed weighers with the cumulative PF flow measured by the PF mass flow measurement system showed agreement to within 1.8% relative over the primary air range 40–90%.

Published
2000
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3. Image Processing and Display Systems for the CSIRO Air Cargo Scanner

Author

J.R. Tickner and Yi Liu

Subjects
Scanner, business.industry, Computer science, Interface (computing), Preprocessor, Image processing, Filter (signal processing), business, Bulk cargo, International airport, Computer hardware, Simulation, Air cargo
Abstract

The Fast Neutron/Gamma-ray Radiography (FNGR) technique developed by the Commonwealth Scientific and Industrial Research Organization (CSIRO) provides a new way to screen consolidated air freight for contraband such as illicit drugs and explosives. The combination of density and composition information from the FNGR technique improves discrimination of suspect materials. A full-scale prototype FNGR air cargo scanner has been installed at Brisbane International Airport and is undergoing extensive trials by Australian Customs. In this paper, the technical challenges in developing image processing and display systems for the FNGR scanner are discussed. Image processing techniques have been developed that combine physically motivated corrections and preprocessing steps with modern, non-linear filter techniques. The design of the image display and analysis software is driven by the short time available to study each scanned image, necessitating a powerful, clean, and easy-to-use interface. The CSIRO Air Cargo Scanner is a very promising new technology for bulk cargo screening.

Published
2006
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4. Measurement of elastic $\phi$ photoproduction at HERA

Author

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

Subjects
Diffraction, Nuclear and High Energy Physics, Particle physics, Meson, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, PHYSICS, Cross section (physics), DESIGN, 0103 physical sciences, 010306 general physics, DETECTOR, ZEUS, ZEUS BARREL CALORIMETER, CONSTRUCTION, Physics, Range (particle radiation), ZEUS (particle detector), 010308 nuclear & particles physics, HERA, Helicity, Exponential function, High Energy Physics::Experiment
Abstract

The production of $\phi$ mesons in the reaction $e^{+}p \rightarrow e^{+} \phi p$ ($\phi \rightarrow K^{+}K^{-}$) at a median $Q^{2}$ of $10^{-4} \ \rm{GeV^2}$ has been studied with the ZEUS detector at HERA. The differential $\phi$ photoproduction cross section $d\sigma/dt$ has an exponential shape and has been determined in the kinematic range $0.1, Comment: 23 pages, including 6 post script figures

Published
1996

5. Rapidity gaps between jets in photoproduction at HERA

Author

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

Subjects
Nuclear and High Energy Physics, Particle physics, COLLISIONS, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, EVENTS, High Energy Physics - Experiment (hep-ex), MONTE-CARLO, DESIGN, 0103 physical sciences, Rapidity, 010306 general physics, Nuclear Experiment, Physics, Research Groups and Centres\Physics\Low Temperature Physics, ZEUS (particle detector), CONSTRUCTION, 010308 nuclear & particles physics, Faculty of Science\Physics, ZEUS, PARTON ELASTIC-SCATTERING, ZEUS BARREL CALORIMETER, HERA, diffractive scattering, photoproduction, High Energy Physics::Experiment
Abstract

Photoproduction events which have two or more jets have been studied in the $W_{\gamma p}$ range 135~GeV $< W_{\gamma p}, Comment: 19 pages, latex, 3 figures appended as uuencoded file. Author list corrected

Published
1996

6. Measurement of Alpha(s) From Jet Rates In Deep-inelastic Scattering At Hera

Author

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

Subjects
Nuclear and High Energy Physics, Particle physics, jet production, ENERGIES, Astrophysics::High Energy Astrophysical Phenomena, Parton, PROTON SCATTERING, 01 natural sciences, perturbative QCD, High Energy Physics - Experiment, CROSS-SECTIONS, Nuclear physics, EVENT GENERATOR, MONTE-CARLO, QCD JETS, ZEUS, CALORIMETER, FRAGMENTATION, DEPENDENCE, 0103 physical sciences, determination of alpha_s, 010306 general physics, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Perturbative QCD, HERA, Deep inelastic scattering, High Energy Physics::Experiment
Abstract

Jet production in deep inelastic scattering for $120, Comment: 22 pages, latex, 4 figures appended as uuencoded file

Published
1995

7. Measurement of the reaction γ*p→φp in deep inelastic e+p scattering at HERA

Author

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

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Proton, 010308 nuclear & particles physics, Perturbative QCD, HERA, 7. Clean energy, 01 natural sciences, Zeus (malware), Gluon, Nuclear physics, Pomeron, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract

The production of φ mesons in the reaction e+p → e+φp (φ → K+K−), for 7 Q 2 GeV 2 and virtual photon-proton centre of mass energies (W) in the range 42–134 GeV, has been studied with the ZEUS detector at HERA. When compared to lower energy data at similar Q 2, the results show that the γ ∗ p → φp cross section rises strongly with W. This behaviour is similar to that previously found for the γ ∗ p → ϱ 0 p cross section. This strong dependence cannot be explained by production through soft pomeron exchange. It is, however, consistent with perturbative QCD expectations, where it reflects the rise of the gluon momentum density in the proton at small x. The ratio of σ(φ) σ(ϱ 0 ) , which has previously been determined by ZEUS to be 0.065 ± 0.013 (stat.) in photoproduction at a mean W of 70 GeV, is measured to be 0.18 ± 0.05 (stat.) ± 0.03 (syst.) at a mean Q 2 of 12.3 GeV2 and mean W of ≈ 100 GeV and is thus approaching at large Q 2 the value of 2 9 predicted from the quark charges of the vector mesons and a flavour independent production mechanism.

8. Observation of scaling violations in scaled momentum distributions at HERA

Author

J Breitweg, M Derrick, D Krakauer, S Magill, D Mikunas, B Musgrave, J Repond, R Stanek, R.L Talaga, R Yoshida, H Zhang, M.C.K Mattingly, F Anselmo, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, G Cara Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, M Corradi, S De Pasquale, I Gialas, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Pesci, A Polini, F Ricci, G Sartorelli, Y Zamora Garcia, A Zichichi, C Amelung, A Bornheim, I Brock, K Coböken, J Crittenden, R Deffner, M Eckert, M Grothe, H Hartmann, K Heinloth, L Heinz, E Hilger, H.-P Jakob, U.F Katz, R Kerger, E Paul, M Pfeiffer, Ch Rembser, J Stamm, R Wedemeyer, H Wieber, D.S Bailey, S Campbell-Robson, W.N Cottingham, B Foster, R Hall-Wilton, M.E Hayes, G.P Heath, H.F Heath, J.d McFall, D Piccioni, D.G Roff, R.J Tapper, M Arneodo, R Ayad, M Capua, A Garfagnini, L Iannotti, M Schioppa, G Susinno, J.Y Kim, J.H Lee, I.T Lim, M.Y Pac, A Caldwell, N Cartiglia, Z Jing, W Liu, B Mellado, J.A Parsons, S Ritz, S Sampson, F Sciulli, P.B Straub, Q Zhu, P Borzemski, J Chwastowski, A Eskereys, J Figiel, K Klimek, M.B Przybycień, L Zawiejski, L Adamczyk, B Bednarek, M Bukowy, K Jeleń, D Kisielewska, T Kowalski, M Przybycień, E Rulikowska-Zarȩbska, L Suszycki, J Zaja̧c, Z Duliński, A Kotański, G Abbiendi, L.A.T Bauerdick, U Behrens, H Beier, J.K Bienlein, G Cases, O Deppe, K Desler, G Drews, U Fricke, D.J Gilkinson, C Glasman, P Göttlicher, T Haas, W Hain, D Hasell, K.F Johnson, M Kasemann, W Koch, U Kötz, H Kowalski, J Labs, L Lindemann, B Löhr, M Löwe, O Mańczak, J Milewski, T Monteiro, J.S.T Ng, D Notz, K Ohrenberg, I.H Park, A Pellegrino, F Pelucchi, K Piotrzkowski, M Roco, M Rohde, J Roldán, J.J Ryan, A.A Savin, U Schneekloth, F Selonke, B Surrow, E Tassi, T Voß, D Westphal, G Wolf, U Wollmer, C Youngman, A.F Żarnecki, W Zeuner, B.D Burow, H.J Grabosch, A Meyer, S Schlenstedt, G Barbagli, E Gallo, P Pelfer, G Maccarrone, L Votano, A Bamberger, S Eisenhardt, P Markun, T Trefzger, S Wölfle, J.T Bromley, N.H Brook, P.J Bussey, A.T Doyle, N Macdonald, D.H Saxon, L.E Sinclair, E Strickland, R Waugh, I Bohnet, N Gendner, U Holm, A Meyer-Larsen, H Salehi, K Wick, L.K Gladilin, D Horstmann, D Kçira, R Klanner, E Lohrmann, G Poelz, W Schott, F Zetsche, T.C Bacon, I Butterworth, J.E Cole, G Howell, B.H.Y Hung, L Lamberti, K.R Long, D.B Miller, N Pavel, A Prinias, J.K Sedgbeer, D Sideris, U Mallik, S.M Wang, J.T Wu, P Cloth, D Filges, J.I Fleck, T Ishii, M Kuze, I Suzuki, K Tokushuku, S Yamada, K Yamauchi, Y Yamazaki, S.J Hong, S.B Lee, S.W Nam, S.K Park, F Barreiro, J.P Fernándeza, G García, R Graciani, J.M Hernández, L Hervás, L Labarga, M Martínez, J del Peso, J Puga, J Terrón, J.F de Trocóniz, F Corriveau, D.S Hanna, J Hartmann, L.W Hung, W.N Murray, A Ochs, M Riveline, D.G Stairs, M St-Laurent, R Ullmann, T Tsurugai, V Bashkirov, B.A Dolgoshein, A Stifutkin, G.L Bashindzhagyan, P.F Ermolov, Yu.A Golubkov, L.A Khein, N.A Korotkova, I.A Korzhavina, V.A Kuzmin, O.Yu Lukina, A.S Proskuryakov, L.M Shcheglova, A.N Solomin, S.A Zotkin, C Bokel, M Botje, N Brümmer, F Chlebana, J Engelen, E Koffeman, P Kooijman, A van Sighem, H Tiecke, N Tuning, W Verkerke, J Vossebeld, M Vreeswijk, L Wiggers, E de Wolf, D Acosta, B Bylsma, L.S Durkin, J Gilmore, C.M Ginsburg, C.L Kim, T.Y Ling, P Nylander, T.A Romanowski, H.E Blaikley, R.J Cashmore, A.M Cooper-Sarkar, R.C.E Devenish, J.K Edmonds, J Große-Knetter, N Harnew, M Lancaster, C Nath, V.A Noyes, A Quadt, O Ruske, J.R Tickner, H Uijterwaal, R Walczak, D.S Waters, A Bertolin, R Brugnera, R Carlin, F Dal Corso, U Dosselli, S Limentani, M Morandin, M Posocco, L Stanco, R Stroili, C Voci, J Bulmahn, B.Y Oh, J.R Okrasiński, W.S Toothacker, J.J Whitmore, Y Iga, G D'Agostini, G Marini, A Nigro, M Raso, J.C Hart, N.A McCubbin, T.P Shah, D Epperson, C Heusch, J.T Rahn, H.F.-W Sadrozinski, A Seiden, R Wichmann, D.C Williams, O Schwarzer, A.H Walenta, H Abramowicz, G Briskin, S Dagan, S Kananov, A Levy, T Abe, T Fusayasu, M Inuzuka, K Nagano, K Umemori, T Yamashita, R Hamatsu, T Hirose, K Homma, S Kitamura, T Matsushita, R Cirio, M Costa, M.I Ferrero, S Maselli, V Monaco, C Peroni, M.C Petrucci, M Ruspa, R Sacchi, A Solano, A Staiano, M Dardo, D.C Bailey, C.-P Fagerstroem, R Galea, G.F Hartner, K.K Joo, G.M Levman, J.F Martin, R.S Orr, S Polenz, A Sabetfakhri, D Simmons, R.J Teuscher, J.M Butterworth, C.D Catterall, T.W Jones, J.B Lane, R.L Saunders, J Shulman, M.R Sutton, M Wing, J Ciborowski, G Grzelak, M Kasprzak, K Muchorowski, R.J Nowak, J.M Pawlak, R Pawlak, T Tymieniecka, A.K Wróblewski, J.A Zakrzewski, M Adamus, C Coldewey, Y Eisenberg, D Hochman, U Karshon, W.F Badgett, D Chapin, R Cross, S Dasu, C Foudas, R.J Loveless, S Mattingly, D.D Reeder, W.H Smith, A Vaiciulis, M Wodarczyk, S Bhadra, W.R Frisken, M Khakzad, W.B Schmidke, and Zeus (IHEF, IoP, FNWI)

Subjects
ZEUS, CENTRAL TRACKING DETECTOR, ZEUS BARREL CALORIMETER, FRAGMENTATION FUNCTIONS, E+E-ANNIHILATION, MASS-ENERGY, QCD, PROTON, CONSTRUCTION, DESIGN, SCATTERING, Nuclear and High Energy Physics, Particle physics, FOS: Physical sciences, Large range, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, 010306 general physics, Scaling, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Scattering, Detector, HERA, Deep inelastic scattering, Charged particle, High Energy Physics::Experiment
Abstract

Charged particle production has been measured in deep inelastic scattering (DIS) events over a large range of $x$ and $Q^2$ using the ZEUS detector. The evolution of the scaled momentum, $x_p$, with $Q^2,$ in the range 10 to 1280 $GeV^2$, has been investigated in the current fragmentation region of the Breit frame. The results show clear evidence, in a single experiment, for scaling violations in scaled momenta as a function of $Q^2$., Comment: 21 pages including 4 figures, to be published in Physics Letters B. Two references added

9. Dijet angular distributions in direct and resolved photoproduction at HERA

Author

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

Subjects
Nuclear and High Energy Physics, Particle physics, COLLISIONS, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, FOS: Physical sciences, Jet (particle physics), PPBAR COLLIDER, PROTON, 01 natural sciences, 7. Clean energy, law.invention, CROSS-SECTIONS, High Energy Physics - Experiment, Nuclear physics, EVENTS, High Energy Physics - Experiment (hep-ex), GAMMA-P INTERACTIONS, MONTE-CARLO, law, 0103 physical sciences, Invariant mass, 010306 general physics, Collider, Nuclear Experiment, Quantum chromodynamics, Physics, ZEUS (particle detector), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, ZEUS, ZEUS BARREL CALORIMETER, HERA, Rest frame, Gluon, PARTON DISTRIBUTIONS, HARD SCATTERING, High Energy Physics::Experiment
Abstract

Jet photoproduction, where the two highest transverse energy ($\ETJ$) jets have $\ETJ$ above 6 GeV and a jet-jet invariant mass above 23~GeV, has been studied with the ZEUS detector at the HERA $ep$ collider. 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., 20 pages including 4 figures

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