DIJET CROSS-SECTIONS IN PHOTOPRODUCTION AT HERA

M DERRICK, D KRAKAUER, S MAGILL, D MIKUNAS, B MUSGRAVE, J REPOND, R STANEK, TALAGA RL, H ZHANG, R AYAD, G BARI, M BASILE, L BELLAGAMBA, D BOSCHERINI, A BRUNI, G BRUNI, P BRUNI, ROMEO GC, G CASTELLINI, M CHIARINIL 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, GARCIA YZ, A ZICHICHI, A BARGENDE, J CRITTENDEN, K DESCH, B DIEKMANN, T DOEKER, M ECKERT, L FELD, A FREY, M GEERTS, G GEITZ, M GROTHE, T HAAS, H HARTMANN, D HAUN, K HEINLOTH, E HILGER, JAKOB HP, KATZ UF, MARI SM, A MASS, S MENGEL, J MOLLEN, E PAUL, C REMBSER, R SCHATTEVOY, D SCHRAMM, J STAMM, R WEDEMEYER, S CAMPBELLROBSON, A CASSIDY, N DYCE, B FOSTER, S GEORGE, R GILMORE, HEATH GP, HEATH HF, LLEWELLYN TJ, MORGADO CJS, NORMAN DJP, OMARA JA, TAPPER RJ, WILSON SS, R YOSHIDA, RAU RR, Michele ARNEODO, L IANNOTTI, M SCHIOPPA, G SUSINNO, A BERNSTEIN, A CALDWELL, N CARTIGLIA, PARSON JA, S RITZ, F SCIULLI, STRAUB PB, L WAI, S YANG, Q ZHU, P BORZEMSKI, J CHWASTOWSKI, A ESKREYS, K PIOTRZKOWSKI, M ZACHARA, L ZAWIEJSKI, L ADAMCZYK, B BEDNAREK, K JELEN, D KISIELEWSKA, T KOWALSKI, E RULIKOWSKAZAREBSKA, L SUSZYCKI, J ZAJAC, A KOTANSKI, M PRZYBYCIEN, BAUERDICK LAT, U BEHRENS, H BEIER, BIENLEIN JK, C COLDEWEY, O DEPPE, K DESLER, G DREWS, M FLASINSKI, GILKINSON DJ, C GLASMAN, P GOTTLICHER, J GROSSEKNETTER, B GUTJAHR, W HAIN, D HASELL, H HESSLING, H HULTSCHIG, Y IGA, P JOOS, M KASEMANN, R KLANNER, W KOCH, L KOPKE, U KOTZ, H KOWALSKI, J LABS, A LADAGE, B LOHR, M LOWE, D LUKE, O MANCZAK, NG JST, S NICKEL, D NOTZ, K OHRENBERG, M ROCO, M ROHDE, J ROLDAN, U SCHNEEKLOTH, W SCHULZ, F SELONKE, E STILIARIS, B SURROW, T VOSS, D WESTPHAL, G WOLF, C YOUNGMAN, ZHOU JF, GRABOSCH HJ, A KHARCHILAVA, A LEICH, M MATTINGLY, A MEYER, S SCHLENSTEDT, N WULFF, G BARBAGLI, P PELFER, G ANZIVINO, G MACCARRONE, S DEPASQUALE, L VOTANO, A BAMBERGER, S EISENHARDT, A FREIDHOF, S SOLDNERREMBOLD, J SCHROEDER, T TREFZGER, BROOK NH, BUSSEY PJ, DOYLE AT, FLECK JI, SAXON DH, UTLEY ML, WILSON AS, A DANNEMANN, U HOLM, D HORSTMANN, T NEUMANN, R SINKUS, K WICK, E BADURA, BUROW BD, L HAGGE, E LOHRMANN, J MAINUSCH, J MILEWSKI, M NAKAHATA, N PAVEL, G POELZ, W SCHOTT, F ZETSCHE, BACON TC, I BUTTERWORTH, E GALLO, HARRIS VL, HUNG BYH, LONG KR, MILLER DB, MORAWITZ PPO, A PRINIAS, SEDGBEER JK, WHITFIELD AF, U MALLIK, E MCCLIMENT, WANG MZ, WANG SM, WU JT, Y ZHANG, P CLOTH, D FILGES, AN SH, HONG SM, NAM SW, PARK SK, SUH MH, YON SH, R IMLAY, S KARTIK, KIM HJ, MCNEIL RR, W METCALF, NADENDLA VK, F BARREIRO, G CASES, R GRACIANI, HERNANDEZ JM, L HERVAS, L LABARGA, J DELPESO, J PUGA, J TERRON, DETROCONIZ JF, SMITH GR, F CORRIVEAU, HANNA DS, J HARTMANN, HUNG LW, LIM JN, MATTHEWS CG, PATEL PM, SINCLAIR LE, STAIRS DG, M STLAURENT, R ULLMANN, G ZACEK, V BASHKIROV, DOLGOSHEIN BA, A STIFUTKIN, BASHINDZHAGYAN GL, ERMOLOV PF, GLADILIN LK, GOLUBKOV YA, KOBRIN VD, KUZMIN VA, PROSKURYAKOV AS, SAVIN AA, SHCHEGLOVA LM, SOLOMIN AN, ZOTOV NP, M BOTJE, F CHLEBANA, A DAKE, J ENGELEN, M DEKAMPS, P KOOIJMAN, A KRUSE, H TIECKE, W VERKERKE, M VREESWIJK, L WIGGERS, E DEWOLF, R VANWOUDENBERG, D ACOSTA, B BYLSMA, DURKIN LS, K HONSCHEID, C LI, LING TY, MCLEAN KW, MURRAY WN, PARK IH, ROMANOWSKI TA, R SEIDLEIN, BAILEY DS, BLAIR GA, A BYRNE, CASHMORE RJ, COOPERSARKAR AM, D DANIELS, DEVENISH RCE, N HARNEW, M LANCASTER, LUFFMAN PE, L LINDEMANN, MCFALL JD, C NATH, NOYES VA, A QUADT, H UIJTERWAAL, R WALCZAK, WILSON FF, T YIP, G ABBIENDI, A BERTOLIN, R BRUGNERA, R CARLIN, F DALCORSO, M DEGIORGI, U DOSSELLI, S LIMENTANI, M MORANDIN, M POSOCCO, L STANCO, R STROILI, C VOCI, J BULMAHN, BUTTERWORTH JM, FEILD RG, OH BY, WHITMORE JJ, G DAGOSTINI, G MARINI, A NIGRO, E TASSI, HART JC, MCCUBBIN NA, K PRYTZ, SHAH TP, SHORT TL, E BARBERIS, T DUBBS, C HEUSCH, M VANHOOK, B HUBBARD, W LOCKMAN, RAHN JT, SADROZINSKI HFW, A SEIDEN, J BILTZINGER, SEIFERT RJ, WALENTA AH, G ZECH, H ABRAMOWICZ, G BRISKIN, S DAGAN, A LEVY, 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, FERRERO MI, L LAMBERTI, S MASELLI, C PERONI, R SACCHI, A SOLANO, A STAIANO, M DARDO, BAILEY DC, D BANDYOPADHYAY, F BENARD, M BRKIC, CROMBIE MB, GINGRICH DM, HARTNER GF, JOO KK, LEVMAN GM, MARTIN JF, ORR RS, SAMPSON CR, TEUSCHER RJ, CATTERALL CD, JONES TW, KAZIEWICZ PB, LANE JB, SAUNDERS RL, J SHULMAN, K BLANKENSHIP, J KOCHOCKI, B LU, MO LW, W BOGUSZ, K CHARCHULA, J CIBOROWSKI, J GAJEWSKI, G GRZELAK, M KASPRZAK, M KRZYZANOWSKI, K MUCHOROWSKI, NOWAK RJ, PAWLAK JM, T TYMIENIECKA, WROBLEWSKI AK, ZAKRZEWSKI JA, ZARNECKI AF, M ADAMUS, Y EISENBERG, U KARSHON, D REVEL, D ZERZION, I ALI, BADGETT WF, B BEHRENS, S DASU, C FORDHAM, C FOUDAS, A GOUSSIOU, LOVELESS RJ, REEDER DD, S SILVERSTEIN, SMITH WH, A VAICIULIS, M WODARCZYK, T TSURUGAI, S BHADRA, CARDY ML, FAGERSTROEM CP, FRISKEN WR, FURUTANI KM, M KHAKZAD, SCHMIDKE WB

Risultato della ricerca: Contributo su rivistaArticolo in rivista

Abstract

Dijet production by almost real photons has been studied at HERA with the ZEUS detector. Jets have been identified using the cone algorithm. A cut on xγ OBS, the fraction of the photon energy participating in the production of the two jets of highest transverse energy, is used to define cross sections sensitive to the parton distributions in the proton and in the photon. The dependence of the dijet cross sections on pseudorapidity has been measured for xγ OBS ≥ 0.75 and xγ OBS < 0.75. The former is sensitive to the gluon momentum density in the proton. The latter is sensitive to the ginon in the photon. The cross sections are corrected for detector acceptance and compared to leading order QCD calculations.

Lingua originaleInglese
pagine (da-a)665-680
Numero di pagine16
RivistaPHYSICS LETTERS. SECTION B
Volume348
Numero di pubblicazione3-4
DOI
Stato di pubblicazionePubblicato - 1995

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