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Observation of direct processes in photoproduction at HERA

Physics Letters B 322:3 (1994) 287-300

Authors:

M Derrick, D Krakauer, S Magill, B Musgrave, J Repond, S Repond, R Stanek, RL Talaga, J Thron, F Arzarello, 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, F Ciralli, A Contin, C Del Papa, S D'Auria, F Frasconi, P Giusti, G Iacobucci, G Laurenti, G Levi, Q Lin, G Maccarrone, A Margotti, T Massam, R Nania, C Nemoz, F Palmonari, G Sartorelli, R Timellini, Y Zamora Garcia, A Zichichi, A Bargende, J Crittenden, K Desch, B Diekmann, T Doeker, L Feld, A Frey, M Geerts, G Geitz, H Hartmann, D Haun, K Heinloth, E Hilger, HP Jakob, UF Katz, S Kramarczyk, M Kückes, A Mass, S Mengel, J Mollen, H Müsch, E Paul, R Schattevoy, JL Schneider, D Schramm, R Wedemeyer, A Cassidy, DG Cussans, N Dyce, B Foster, S George, R Gilmore, GP Heath, HF Heath, M Lancaster, TJ Llewellyn, CJS Morgado, JA O'Mara, RJ Tapper, SS Wilson, R Yoshida, RR Rau, M Arneodo, M Schioppa, G Susinno, A Bernstein, A Caldwell, I Gialas, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, P Borzemski, J Chwastowski, A Eskreys

Abstract:

Jets in photoproduction events have been studied with the ZEUS detector for γp centre-of-mass energies ranging from 130 to 250 GeV. The inclusive jet distributions give evidence for the dominance of resolved photon interactions. In the di-jet sample the direct processes are for the first time clearly isolated. Di-jet cross sections for the resolved and direct processes are given in a restricted kinematic range. © 1994.
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The DØ detector

Nuclear Inst. and Methods in Physics Research, A 338:2-3 (1994) 185-253

Authors:

S Abachi, M Abolins, BS Acharya, I Adam, S Ahn, H Aihara, G Alvarez, GA Alves, N Amos, W Anderson, Y Antipov, SH Aronson, R Astur, RE Avery, A Baden, J Balderston, B Baldin, J Bantly, E Barasch, JF Bartlett, K Bazizi, T Behnke, V Bezzubov, PC Bhat, G Blazey, S Blessing, A Boehnlein, F Borcherding, J Borders, N Bozko, A Brandt, R Brock, A Bross, D Buchholz, V Burtovoy, JM Butler, O Callot, D Chakraborty, S Chekulaev, J Chen, LP Chen, W Chen, BC Choudhary, JH Christenson, D Claes, AR Clark, WG Cobau, J Cochran, WE Cooper, C Cretsinger, D Cullen-Vidal, M Cummings, D Cutts, OI Dahl, B Daniels, K De, M Demarteau, K Denisenko, N Denisenko, D Denisov, S Denisov, W Dharmaratna, HT Diehl, M Diesburg, R Dixon, P Draper, Y Ducros, S Durston-Johnson, D Eartly, PH Eberhard, D Edmunds, A Efimov, J Ellison, VD Elvira, R Engelmann, O Eroshin, V Evdokimov, S Fahey, G Fanourakis, M Fatyga, J Featherly, S Feher, D Fein, T Ferbel, D Finley, G Finocchiaro, HE Fisk, E Flattum, GE Forden, M Fortner, P Franzini, S Fuess, E Gallas, CS Gao, TL Geld, K Genser, CE Gerber, B Gibbard, V Glebov, JF Glicenstein

Abstract:

The DØ detector is a large general purpose detector for the study of short-distance phenomena in high energy antiproton-proton collisions, now in operation at the Fermilab Tevatron collider. The detector focusses upon the detection of electrons, muons, jets and missing transverse momentum. We describe the design and performance of the major elements of the detector, including the tracking chambers, transition radiation detector, liquid argon calorimetry and muon detection. The associated electronics, triggering systems and data acquisition systems are presented. The global mechanical, high voltage, and experiment monitoring and control systems which support the detector are described. We also discuss the design and implementation of software and software support systems that are specific to DØ. © 1994.
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APC3-A Charge Sampling, Storage & Readout Chip for Silicon Detector Readout RD2 Collaboration

IEEE Transactions on Nuclear Science 41:4 (1994) 1091-1094

Authors:

K Borer, DJ Munday, MA Parker, F Anghinolfi, P Aspell, M Campbell, P Jarron, EHM Heijne, JC Santiard, H Verweij, C Gößling, A Reichold, R Bonino, AG Clark, H Kambara, DL Marra, A Leger, JP Richeaux, X Wu, F Fares, J Bibby, A Weidberg, D Campbell, P Murray, P Seller, M Rouget, J Teiger

Abstract:

The “APC3” is a charge sampling and storage chip designed for high speed readout of silicon detectors. It has 32 channels, each with preamplifier, integrator and storage capacitors. Current from a silicon detector connected to the input is integrated as a charge and stored on a capacitor. There are 128 capacitors per channel which are used sequentially to store the charge. The charge is held on the storage capacitor until it is either read out or discarded. Logic on the chip manages the storage and retrieval of samples. This logic uses a novel architecture based on a system of pointers and read out addresses. This paper describes the operation of the chip and measurements of its performance. © 1994 IEEE
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Analysis of hadronic transitions in Upsilon (3S) decays.

Physical review. D, Particles and fields 49:1 (1994) 40-57

Authors:

F Butler, X Fu, G Kalbfleisch, M Lambrecht, WR Ross, P Skubic, J Snow, PL Wang, M Wood, D Bortoletto, DN Brown, J Fast, RL McIlwain, T Miao, DH Miller, M Modesitt, SF Schaffner, EI Shibata, IP Shipsey, PN Wang, M Battle, J Ernst, H Kroha, S Roberts, K Sparks, EH Thorndike, CH Wang, J Dominick, S Sanghera, T Skwarnicki, R Stroynowski, M Artuso, D He, M Goldberg, N Horwitz, R Kennett, GC Moneti, F Muheim, Y Mukhin, S Playfer, Y Rozen, S Stone, M Thulasidas, G Vasseur, G Zhu, J Bartelt, SE Csorna, Z Egyed, V Jain, P Sheldon, DS Akerib, B Barish, M Chadha, S Chan, DF Cowen, G Eigen, JS Miller, C O'Grady, J Urheim, AJ Weinstein, D Acosta, M Athanas, G Masek, H Paar
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THE D0 DETECTOR D0 COLLABORATION

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 338:2-3 (1994) 185-253

Authors:

S ABACHI, M ABOLINS, BS ACHARYA, I ADAM, S AHN, H AIHARA, G ALVAREZ, GA ALVES, N AMOS, W ANDERSON, Y ANTIPOV, SH ARONSON, R ASTUR, RE AVERY, A BADEN, J BALDERSTON, B BALDIN, J BANTLY, E BARASCH, JF BARTLETT, K BAZIZI, T BEHNKE, V BEZZUBOV, PC BHAT, G BLAZEY, S BLESSING, A BOEHNLEIN, F BORCHERDING, J BORDERS, N BOZKO, A BRANDT, R BROCK, A BROSS, D BUCHHOLZ, V BURTOVOY, JM BUTLER, O CALLOT, D CHAKRABORTY, S CHEKULAEV, J CHEN, LP CHEN, W CHEN, BC CHOUDHARY, JH CHRISTENSON, D CLAES, AR CLARK, WG COBAU, J COCHRAN, WE COOPER, C CRETSINGER, D CULLENVIDAL, M CUMMINGS, D CUTTS, OI DAHL, B DANIELS, K DE, M DEMARTEAU, K DENISENKO, N DENISENKO, D DENISOV, S DENISOV, W DHARMARATNA, HT DIEHL, M DIESBURG, R DIXON, P DRAPER, Y DUCROS, S DURSTONJOHNSON, D EARTLY, PH EBERHARD, D EDMUNDS, A EFIMOV, J ELLISON, VD ELVIRA, R ENGELMANN, O EROSHIN, V EVDOKIMOV, S FAHEY, G FANOURAKIS, M FATYGA, J FEATHERLY, S FEHER, D FEIN, T FERBEL, D FINLEY, G FINOCCHIARO, HE FISK, E FLATTUM, GE FORDEN, M FORTNER, P FRANZINI, S FUESS, E GALLAS, CS GAO, TL GELD, K GENSER, CE GERBER, B GIBBARD, V GLEBOV, JF GLICENSTEIN, B GOBBI, M GOFORTH, ML GOOD, F GOOZEN, H GORDON, N GRAF, PD GRANNIS, DR GREEN, J GREEN, H GREENLEE, N GROSSMAN, P GRUDBERG, JA GUIDA, JM GUIDA, W GURYN, NJ HADLEY, H HAGGERTY, S HAGOPIAN, V HAGOPIAN, RE HALL, S HANSEN, J HAUPTMAN, D HEDIN, AP HEINSON, U HEINTZ, T HEURING, R HIROSKY, K HODEL, JS HOFTUN, JR HUBBARD, T HUEHN, R HUSON, S IGARASHI, AS ITO, E JAMES, J JIANG, K JOHNS, CR JOHNSON, M JOHNSON, A JONCKHEERE, M JONES, H JOSTLEIN, CK JUNG, S KAHN, S KANEKAL, A KERNAN, L KERTH, A KIRUNIN, A KLATCHKO, B KLIMA, B KLOCHKOV, C KLOPFENSTEIN, V KLYUKHIN, V KOCHETKOV, JM KOHLI, W KONONENKO, J KOTCHER, I KOTOV, J KOURLAS, A KOZELOV, E KOZLOVSKY, G KRAFCZYK, K KREMPETZ, MR KRISHNASWAMY, P KROON, S KRZYWDZINSKI, S KUNORI, S LAMI, G LANDSBERG, RE LANOU, P LAURENS, J LEEFRANZINI, J LI, R LI, QZ LIDEMARTEAU, JGR LIMA, SL LINN, J LINNEMANN, R LIPTON, YC LIU, D LLOYDOWEN, F LOBKOWICZ, SC LOKEN, S LOKOS, L LUEKING, AKA MACIEL, RJ MADARAS, R MADDEN, E MALAMUD, P MANGEOT, I MANNING, B MANSOULIE, V MANZELLA, HS MAO, M MARCIN, L MARKOSKY, T MARSHALL, HJ MARTIN, MI MARTIN, PS MARTIN, M MARX, B MAY, A MAYOROV, R MCCARTHY, J MCKINLEY, D MENDOZA, XC MENG, KW MERRITT, A MILDER, A MINCER, NK MONDAL, M MONTAG, P MOONEY, M MUDAN, GT MULHOLLAND, C MURPHY, CT MURPHY, F NANG, M NARAIN, VS NARASIMHAM, HA NEAL, P NEMETHY, D NESIC, KK NG, D NORMAN, L OESCH, V OGURI, E OLTMAN, N OSHIMA, D OWEN, M PANG, A PARA, CH PARK, R PARTRIDGE, M PATERNO, A PERYSHKIN, M PETERS, B PI, H PIEKARZ, Y PISCHALNIKOV, D PIZZUTO, A PLUQUET, V PODSTAVKOV, BG POPE, HB PROSPER, S PROTOPOPESCU, YK QUE, PZ QUINTAS, G RAHALCALLOT, R RAJA, S RAJAGOPALAN, MVS RAO, L RASMUSSEN, AL READ, T REGAN, S REPOND, V RIADOVIKOV, M RIJSSENBEEK, NA ROE, P RUBINOV, J RUTHERFOORD, A SANTORO, L SAWYER, RD SCHAMBERGER, J SCULLI, W SELOVE, M SHEA, A SHKURENKOV, M SHUPE, JB SINGH, V SIROTENKO, W SMART, A SMITH, D SMITH, RP SMITH, GR SNOW, S SNYDER, M SOSEBEE, M SOUZA, AL SPADAFORA, S STAMPKE, R STEPHENS, ML STEVENSON, D STEWART, F STOCKER, D STOYANOVA, H STREDDE, K STREETS, M STROVINK, A SUHANOV, A TAKETANI, M TARTAGLIA, JD TAYLOR, J TEIGER, G THEODOSIOU, J THOMPSON, S TISSERANT, TG TRIPPE, PM TUTS, R VANBERG, M VAZ, PR VISHWANATH, A VOLKOV, A VOROBIEV, HD WAHL, DC WANG, LZ WANG, H WEERTS, WA WENZEL, A WHITE, JT WHITE, J WIGHTMAN, S WILLIS, SJ WIMPENNY, Z WOLF, J WOMERSLEY, DR WOOD, Y XIA, D XIAO, P XIE, H XU, R YAMADA, P YAMIN, C YANAGISAWA, J YANG, MJ YANG, C YOSHIKAWA, S YOUSSEF, J YU, R ZELLER, S ZHANG, YH ZHOU, Q ZHU, YS ZHU, D ZIEMINSKA, A ZIEMINSKI, A ZINCHENKO, A ZYLBERSTEJN
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