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MEASUREMENT OF THE CROSS-SECTION FOR THE REACTION GAMMA-P-]J/PSI-P WITH THE ZEUS DETECTOR AT HERA

PHYSICS LETTERS B 350:1 (1995) 120-134

Authors:

M DERRICK, D KRAKAUER, S MAGILL, D MIKUNAS, B MUSGRAVE, J REPOND, R STANEK, RL TALAGA, H ZHANG, R AYAD, G BARI, M BASILE, L BELLAGAMBA, D BOSCHERINI, A BRUNI, G BRUNI, P BRUNI, GC 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, YZ GARCIA, 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, HP JAKOB, UF KATZ, SM MARI, 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, GP HEATH, HF HEATH, TJ LLEWELLYN, CJS MORGADO, DJP NORMAN, JA OMARA, RJ TAPPER, SS WILSON, R YOSHIDA, RR RAU, M ARNEODO, L IANNOTTI, M SCHIOPPA, G SUSINNO, A BERNSTEIN, A CALDWELL, N CARTIGLIA, JA PARSONS, S RITZ, F SCIULLI, PB STRAUB, 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, LAT BAUERDICK, U BEHRENS, H BEIER, JK BIENLEIN, C COLDEWEY, O DEPPE, K DESLER, G DREWS, M FLASINSKI, DJ GILKINSON, C GLASMAN, P GOTTLICHER, J GROSSEKNETTER, B GUTJAHR, W HAIN, D HASELL, H HESSLING, 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, T MONTEIRO, JST NG, 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, JF ZHOU, HJ GRABOSCH, A KHARCHILAVA, A LEICH, MCK 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, NH BROOK, PJ BUSSEY, AT DOYLE, JI FLECK, DH SAXON, ML UTLEY, AS WILSON, A DANNEMANN, U HOLM, D HORSTMANN, T NEUMANN, R SINKUS, K WICK, E BADURA, BD BUROW, L HAGGE, E LOHRMANN, J MAINUSCH, J MILEWSKI, M NAKAHATA, N PAVEL, G POELZ, W SCHOTT, F ZETSCHE, TC BACON, I BUTTERWORTH, E GALLO, VL HARRIS, BYH HUNG, KR LONG, DB MILLER, PPO MORAWITZ, A PRINIAS, JK SEDGBEER, AF WHITFIELD, U MALLIK, E MCCLIMENT, MZ WANG, SM WANG, JT WU, Y ZHANG, P CLOTH, D FILGES, SH AN, SM HONG, SW NAM, SK PARK, MH SUH, SH YON, R IMLAY, S KARTIK, HJ KIM, RR MCNEIL, W METCALF, VK NADENDLA, F BARREIRO, G CASES, R GRACIANI, JM HERNANDEZ, L HERVAS, L LABARGA, J DELPESO, J PUGA, J TERRON, JF DETROCONIZ, GR SMITH, F CORRIVEAU, DS HANNA, J HARTMANN, LW HUNG, JN LIM, CG MATTHEWS, PM PATEL, LE SINCLAIR, DG STAIRS, M STLAURENT, R ULLMANN, G ZACEK, V BASHKIROV, BA DOLGOSHEIN, A STIFUTKIN, GL BASHINDZHAGYAN, PF ERMOLOV, LK GLADILIN, YA GOLUBKOV, VD KOBRIN, VA KUZMIN, AS PROSKURYAKOV, AA SAVIN, LM SHCHEGLOVA, AN SOLOMIN, NP ZOTOV, 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, LS DURKIN, K HONSCHEID, C LI, TY LING, KW MCLEAN, WN MURRAY, IH PARK, TA ROMANOWSKI, R SEIDLEIN, DS BAILEY, GA BLAIR, A BYRNE, RJ CASHMORE, AM COOPERSARKAR, D DANIELS, RCE DEVENISH, N HARNEW, M LANCASTER, PE LUFFMAN, L LINDEMANN, JD MCFALL, C NATH, VA NOYES, A QUADT, H UIJTERWAAL, R WALCZAK, FF WILSON, 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, JM BUTTERWORTH, RG FEILD, BY OH, JJ WHITEMORE, G DAGOSTINI, G MARINI, A NIGRO, E TASSI, JC HART, NA MCCUBBIN, K PRYTZ, TP SHAH, TL SHORT, E BARBERIS, T DUBBS, C HEUSCH, M VANHOOK, B HUBBARD, W LOCKMAN, JT RAHN, HFW SADROZINSKI, A SEIDEN, J BILTZINGER, RJ SEIFERT, AH WALENTA, 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, MI FERRERO, L LAMBERTI, S MASELLI, C PERONI, R SACCHI, A SOLANO, A STAIANO, M DARDO, DC BAILEY, D BANDYOPADHYAY, F BENARD, M BRKIC, MB CROMBIE, DM GINGRICH, GF HARTNER, KK JOO, GM LEVMAN, JF MARTIN, RS ORR, CR SAMPSON, RJ TEUSCHER, CD CATTERALL, TW JONES, PB KAZIEWICZ, JB LANE, RL SAUNDERS, J SHULMAN, K BLANKENSHIP, B LU, LW MO, W BOGUSZ, K CHARCHULA, J CIBOROWSKI, J GAJEWSKI, G GRZELAK, M KASPRZAK, M KRZYZANOWSKI, K MUCHOROWSKI, RJ NOWAK, JM PAWLAK, T TYMIENIECKA, AK WROBLEWSKI, JA ZAKRZEWSKI, AF ZARNECKI, M ADAMUS, Y EISENBERG, U KARSHON, D REVEL, D ZERZION, I ALI, WF BADGETT, B BEHRENS, S DASU, C FORDHAM, C FOUDAS, A GOUSSIOU, RJ LOVELESS, DD REEDER, S SILVERSTEIN, WH SMITH, A VAICIULIS, M WODARCZYK, T TSURUGAI, S BHADRA, ML CARDY, CP FAGERSTROEM, WR FRISKEN, KM FURUTANI, M KHAKZAD, WB SCHMIDKE
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MEASUREMENT OF THE DIFFRACTIVE STRUCTURE-FUNCTION IN DEEP-INELASTIC SCATTERING AT HERA

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 68:4 (1995) 569-584

Authors:

M DERRICK, D KRAKAUER, S MAGILL, D MIKUNAS, B MUSGRAVE, J REPOND, R STANEK, RL TALAGA, H ZHANG, R AYAD, G BARI, M BASILE, L BELLAGAMBA, D BOSCHERINI, A BRUNI, G BRUNI, P BRUNI, GC 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, YZ GARCIA, A ZICHICHI, A BARGENDE, J CRITTENDEN, K DESCH, B DIEKMANN, T DOEKER, M ECKERT, L FELD, A FREY, M GEERTS, G GEITZ, M GROTHE, H HARTMANN, K HEINLOTH, E HILGER, HP JAKOB, UF KATZ, SM MARI, A MASS, S MENGEL, J MOLLEN, E PAUL, C REMBSER, D SCHRAMM, J STAMM, R WEDEMEYER, S CAMPBELLROBSON, A CASSIDY, N DYCE, B FOSTER, S GEORGE, R GILMORE, GP HEATH, HF HEATH, TJ LLEWELLYN, CJS MORGADO, DJP NORMAN, JA OMARA, RJ TAPPER, SS WILSON, R YOSHIDA, RR RAU, M ARNEODO, M CAPUA, A GARFAGNINI, L IANNOTTI, M SCHIOPPA, G SUSINNO, A BERNSTEIN, A CALDWELL, N CARTIGLIA, JA PARSONS, S RITZ, F SCIULLI, PB STRAUB, 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, LAT BAUERDICK, U BEHRENS, H BEIER, JK BIENLEIN, C COLDEWEY, O DEPPE, K DESLER, G DREWS, M FLASINSKI, DJ GILKINSON, C GLASMAN, P GOTTLICHER, J GROSSEKNETTER, B GUTJAHR, T HAAS, W HAIN, D HASELL, H HESSLING, 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, J MAINUSCH, O MANCZAK, T MONTEIRO, JST NG, 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, JF ZHOU, HJ GRABOSCH, A KHARCHILAVA, A LEICH, MCK 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, NH BROOK, PJ BUSSEY, AT DOYLE, JI FLECK, DH SAXON, ML UTLEY, AS WILSON, A DANNEMANN, U HOLM, D HORSTMANN, T NEUMANN, R SINKUS, K WICK, E BADURA, BD BUROW, L HAGGE, E LOHRMANN, J MILEWSKI, M NAKAHATA, N PAVEL, G POELZ, W SCHOTT, F ZETSCHE, TC BACON, I BUTTERWORTH, E GALLO, VL HARRIS, BYH HUNG, KR LONG, DB MILLER, PPO MORAWITZ, A PRINIAS, JK SEDGBEER, AF WHITFIELD, U MALLIK, E MCCLIMENT, MZ WANG, SM WANG, JT WU, Y ZHANG, P CLOTH, D FILGES, SH AN, SM HONG, SW NAM, SK PARK, MH SUH, SH YON, R IMLAY, S KARTIK, HJ KIM, RR MCNEIL, W METCALF, VK NADENDLA, F BARREIRO, G CASES, JP FERNANDEZ, R GRACIANI, JM HERNANDEZ, L HERVAS, L LABARGA, M MARTINEZ, J DELPESO, J PUGA, J TERRON, JF DETROCONIZ, GR SMITH, F CORRIVEAU, DS HANNA, J HARTMANN, LW HUNG, JN LIM, CG MATTHEWS, PM PATEL, LE SINCLAIR, DG STAIRS, M STLAURENT, R ULLMANN, G ZACEK, V BASHKIROV, BA DOLGOSHEIN, A STIFUTKIN, GL BASHINDZHAGYAN, PF ERMOLOV, LK GLADILIN, YA GOLUBKOV, VD KOBRIN, IA KORZHAVINA, VA KUZMIN, OY LUKINA, AS PROSKURYAKOV, AA SAVIN, LM SHCHEGLOVA, AN SOLOMIN, NP ZOTOV, 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, LS DURKIN, K HONSCHEID, C LI, TY LING, KW MCLEAN, WN MURRAY, IH PARK, TA ROMANOWSKI, R SEIDLEIN, DS BAILEY, A BYRNE, RJ CASHMORE, AM COOPERSARKAR, RCE DEVENISH, N HARNEW, M LANCASTER, L LINDEMANN, JD MCFALL, C NATH, VA NOYES, A QUADT, JR TICKNER, H UIJTERWAAL, R WALCZAK, DS WATERS, FF WILSON, 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, JM BUTTERWORTH, RG FEILD, BY OH, JJ WHITMORE, G DAGOSTINI, G MARINI, A NIGRO, E TASSI, JC HART, NA MCCUBBIN, K PRYTZ, TP SHAH, TL SHORT, E BARBERIS, T DUBBS, C HEUSCH, M VANHOOK, B HUBBARD, W LOCKMAN, JT RAHN, HFW SADROZINSKI, A SEIDEN, J BILTZINGER, RJ SEIFERT, O SCHWARZER, AH WALENTA, 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, MI FERRERO, L LAMBERTI, S MASELLI, C PERONI, R SACCHI, A SOLANO, A STAIANO, M DARDO, DC BAILEY, D BANDYOPADHYAY, F BENARD, M BRKIC, MB CROMBIE, DM GINGRICH, GF HARTNER, KK JOE, GM LEVMAN, JF MARTIN, RS ORR, CR SAMPSON, RJ TEUSCHER, CD CATTERALL, TW JONES, PB KAZIEWICZ, JB LANE, RL SAUNDERS, J SHULMAN, K BLANKENSHIP, B LU, LW MO, W BOGUSZ, K CHARCHULA, J CIBOROWSKI, J GAJEWSKI, G GRZELAK, M KASPRZAK, M KRZYZANOWSKI, K MUCHOROWSKI, RJ NOWAK, JM PAWLAK, T TYMIENIECKA, AK WROBLEWSKI, JA ZAKRZEWSKI, AF ZAMECKI, M ADAMUS, Y EISENBERG, U KARSHON, D REVEL, D ZERZION, I ALI, WF BADGETT, B BEHRENS, S DASU, C FORDHAM, C FOUDAS, A GOUSSIOU, RJ LOVELESS, DD REEDER, S SILVERSTEIN, WH SMITH, A VAICIULIS, M WODARCZYK, T TSURUGAI, S BHADRA, ML CARDY, CP FAGERSTROEM, WR FRISKEN, KM FURUTANI, M KHAKZAD, WB SCHMIDKE
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OBSERVATION OF HARD SCATTERING IN PHOTOPRODUCTION EVENTS WITH A LARGE RAPIDITY GAP AT HERA

PHYSICS LETTERS B 346:3-4 (1995) 399-414

Authors:

M DERRICK, D KRAKAUER, S MAGILL, B MUSGRAVE, J REPOND, J SCHLERETH, R STANEK, RL TALAGA, J THRON, F ARZARELLO, R AYAD, G BARI, M BASILE, L BELLAGAMBA, D BOSCHERINI, A BRUNI, G BRUNI, P BRUNI, GC ROMEO, G CASTELLINI, M CHIARINI, L CIFARELLI, F CINDOLO, F CIRALLI, A CONTIN, S DAURIA, F FRASCONI, 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, YZ GARCIA, A ZICHICHI, A BARGENDE, J CRITTENDEN, K DESCH, B DIEKMANN, T DOEKER, M ECKERT, L FELD, A FREY, M GEERTS, G GEITZ, M GROTHE, H HARTMANN, D HAUN, K HEINLOTH, E HILGER, HP JAKOB, UF KATZ, SM MARI, 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, GP HEATH, HF HEATH, TJ LLEWELLYN, CJS MORGADO, DJP NORMAN, JA OMARA, RJ TAPPER, SS WILSON, R YOSHIDA, RR RAU, M ARNEODO, L IANNOTTI, M SCHIOPPA, G SUSINNO, A BERNSTEIN, A CALDWELL, JA PARSONS, S RITZ, F SCIULLI, PB STRAUB, L WAI, S YANG, Q ZHU, P BORZEMSKI, J CHWASTOWSKI, A ESKREYS, K PIOTRZKOWSKI, M ZACHARA, L ZAWIEJSKI, L ADAMCZYK, B BEDNAREK, K ESKREYS, K JELEN, D KISIELEWSKA, T KOWALSKI, E RULIKOWSKAZAREBSKA, L SUSZYCKI, J ZAJAC, A KOTANSKI, M PRZYBYCIEN, LAT BAUERDICK, U BEHRENS, JK BIENLEIN, S BOTTCHER, C COLDEWEY, G DREWS, M FLASINSKI, DJ GILKINSON, P GOTTLICHER, B GUTJAHR, T HAAS, W HAIN, D HASELL, H HESSLING, H HULTSCHIG, Y IGA, P JOOS, M KASEMANN, R KLANNER, W KOCH, L KOPKE, U KOTZ, H KOWALSKI, W KROGER, J KRUGER, J LABS, A LADAGE, B LOHR, M LOWE, D LUKE, O MANCZAK, JST NG, S NICKEL, D NOTZ, K OHRENBERG, M ROCO, M ROHDE, J ROLDAN, U SCHNEEKLOTH, W SCHULZ, F SELONKE, E STILIARIS, T VOSS, D WESTPHAL, G WOLF, C YOUNGMAN, HJ GRABOSCH, A LEICH, A MEYER, C RETHFELDT, S SCHLENSTEDT, G BARBAGLI, P PELFER, G ANZIVINO, G MACCARRONE, S DEPASQUALE, S QIAN, L VOTANO, A BAMBERGER, A FREIDHOF, T POSER, S SOLDNERREMBOLD, J SCHROEDER, G THEISEN, T TREFZGER, NH BROOK, PJ BUSSEY, AT DOYLE, I FLECK, VA JAMIESON, DH SAXON, ML UTLEY, AS WILSON, A DANNEMANN, U HOLM, D HORSTMANN, H KAMMERLOCHER, B KREBS, T NEUMANN, R SINKUS, K WICK, E BADURA, BD BUROW, A FURTJES, L HAGGE, E LOHRMANN, J MAINUSCH, J MILEWSKI, M NAKAHATA, N PAVEL, G POELZ, W SCHOTT, J TERRON, F ZETSCHE, TC BACON, R BEUSELINCK, I BUTTERWORTH, E GALLO, VL HARRIS, BH HUNG, KR LONG, DB MILLER, PPO MORAWITZ, A PRINIAS, JK SEDGBEER, AF WHITFIELD, U MALLIK, E MCCLIMENT, MZ WANG, SM WANG, JT WU, Y ZHANG, P CLOTH, D FILGES, SH AN, SM HONG, SW NAM, SK PARK, MH SUH, SH YON, R IMLAY, S KARTIK, HJ KIM, RR MCNEIL, W METCALF, VK NADENDLA, F BARREIRO, G CASES, R GRACIANI, JM HERNANDEZ, L HERVAS, L LABARGA, J DELPESO, J PUGA, JF DETROCONIZ, GR SMITH, F CORRIVEAU, DS HANNA, J HARTMANN, LW HUNG, JN LIM, CG MATTHEWS, PM PATEL, LE SINCLAIR, DG STAIRS, M STLAURENT, R ULLMANN, G ZACEK, V BASHIROV, BA DOLGOSHEIN, A STIFUTKIN, GL BASHINDZHAGYAN, PF ERMOLOV, LK GLADILIN, YA GOLUBKOV, VD KOBRIN, VA KUZMIN, AS PROSKURYAKOV, AA SAVIN, LM SHCHEGLOVA, AN SOLOMIN, NP ZOTOV, S BENTVELSEN, M BOTJE, F CHLEBANA, A DAKE, J ENGELEN, P DEJONG, M DEKAMPS, P KOOIJMAN, A KRUSE, V ODELL, A TENNER, H TIECKE, W VERKERKE, M VREESWIJK, L WIGGERS, E DEWOLF, R VANWOUDENBERG, D ACOSTA, B BYLSMA, LS DURKIN, K HONSCHEID, C LI, TY LING, KW MCLEAN, WN MURRAY, IH PARK, TA ROMANOWSKI, R SEIDLEIN, DS BAILEY, GA BLAIR, A BYRNE, RJ CASHMORE, AM COOPERSARKAR, D DANIELS, RCE DEVENISH, N HARNEW, M LANCASTER, PE LUFFMAN, L LINDEMANN, J MCFALL, C NATH, A QUADT, H UIJTERWAAL, R WALCZAK, FF WILSON, 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, JM BUTTERWORTH, RG FEILD, BY OH, JJ WHITMORE, G DAGOSTINI, M IORI, G MARINI, M MATTIOLI, A NIGRO, E TASSI, JC HART, NA MCCUBBIN, K PRYTZ, TP SHAH, TL SHORT, E BARBERIS, N CARTIGLIA, T DUBBS, C HEUSCH, M VANHOOK, B HUBBARD, W LOCKMAN, JT RAHN, HFW SADROZINSKI, A SEIDEN, J BILTZINGER, RJ SEIFERT, AH WALENTA, G ZECH, H ABRAMOWICZ, G BRISKIN, S DAGAN, A LEVY, T HASEGAWA, M HAZUMI, T ISHII, M KUZE, S MINE, Y NAGASAWA, T NAGIRA, M NAKAO, I SUZUKI, K TOKUSHUKU, S YAMADA, Y YAMAZAKI, M CHIBA, R HAMATSU, T HIROSE, K HOMMA, S KITAMURA, S NAGAYAMA, Y NAKAMITSU, R CIRIO, M COSTA, MI FERRERO, L LAMBERTI, S MASELLI, C PERONI, R SACCHI, A SOLANO, A STAIANO, M DARDO, DC BAILEY, D BANDYOPADHYAY, F BENARD, M BRKIC, MB CROMBIE, DM GINGRICH, GE HARTNER, KK JOO, GM LEVMAN, JF MARTIN, RS ORR, CR SAMPSON, RJ TEUSCHER, CD CATTERALL, TW JONES, PB KAZIEWICZ, JB LANE, RL SAUNDERS, J SHULMAN, K BLANKENSHIP, J KOCHOCKI, B LU, LW MO, W BOGUSZ, K CHARCHULA, J CIBOROWSKI, J GAJEWSKI, G GRZELAK, M KASPRZAK, M KRZYZANOWSKI, K MUCHOROWSKI, RJ NOWAK, JM PAWLAK, T TYMIENIECKA, AK WROBLEWSKI, JA ZAKRZEWSKI, AF ZARNECKI, M ADAMUS, Y EISENBERG, C GLASMAN, U KARSHON, D REVEL, A SHAPIRA, I ALI, B BEHRENS, S DASU, C FORDHAM, C FOUDAS, A GOUSSIOU, RJ LOVELESS, DD REEDER, S SILVERSTEIN, WH SMITH, T TSURUGAI, S BHADRA, WR FRISKEN, KM FURUTANI
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Comparison of energy flows in deep inelastic scattering events with and without a large rapidity gap

Physics Letters B 338:4 (1994) 483-496

Authors:

M Derrick, D Krakauer, S Magill, B Musgrave, J Repond, J Schlereth, R Stanek, RL Talaga, J Thron, F Arzarello, R Ayad, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, GC Romeo, G Castellini, M Chiarini, L Cifarelli, F Cindolo, F Ciralli, A Contin, S D'Auria, C Del Papa, F Frasconi, P Giusti, G Iacobucci, G Laurenti, G Levi, G Maccarrone, A Margotti, T Massam, R Nania, C Nemoz, F Palmonari, A Polini, G Sartorelli, R Timellini, YZ Garcia, A Zichichi, A Bargende, J Crittenden, K Desch, B Diekmann, T Doeker, L Feld, A Frey, M Geerts, G Geitz, M Grothe, H Hartmann, D Haun, K Heinloth, E Hilger, HP Jakob, UF Katz, SM Mari, A Mass, S Mengel, J Mollen, E Paul, C Rembser, R Schattevoy, JL Schneider, D Schramm, J Stamm, R Wedemeyer, S Campbell-Robson, A Cassidy, N Dyce, B Foster, S George, R Gilmore, GP Heath, HF Heath, TJ Llewellyn, CJS Morgado, DJP Norman, JA O'Mara, RJ Tapper, SS Wilson, R Yoshida, RR Rau, M Arneodo, L Iannotti, M Schioppa, G Susinno, A Bernstein, A Caldwell, I Gialas, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, P Borzemski

Abstract:

Energy flows in deep inelastic electron-proton scattering are investigated at a centre-of-mass energy of 269 GeV for the range Q2 ≥ 10 GeV2 using the ZEUS detector. A comparison is made between events with and without a large rapidity gap between the hadronic system and the proton direction. The energy flows, corrected for detector acceptance and resolution, are shown for these two classes of events in both the HERA laboratory frame and the Breit frame. From the differences in the shapes of these energy flows we conclude that QCD radiation is suppressed in the large-rapidity-gap eents compared to the events without a large rapidity gap. © 1994.
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Measurement of total and partial photon proton cross sections at 180 GeV center of mass energy

Zeitschrift Fur Physik C Particles and Fields 63:3 (1994) 391-408

Authors:

M Derrick, D Krakauer, S Magill, B Musgrave, J Repond, J Schlereth, R Stanek, RL Talaga, J Thron, F Arzarello, R Ayad, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, GC Romeo, G Castellini, M Chiarini, L Cifarelli, F Cindolo, F Ciralli, A Contin, S D'Auria, C Del Papa, F Frasconi, P Giusti, G Iacobucci, G Laurenti, G Levi, 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, A Mass, S Mengel, J Mollen, E Paul, C Rembser, 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, K Piotrzkowski, M Zachara

Abstract:

Photon proton cross sections for elastic light vector meson production, σelνp, inelastic diffractive production, σndνp, non-diffractive production, σdνp, as well as the total cross section, σtotνp, have been measured at an average υp center of mass energy of 180 GeV with the ZEUS detector at HERA. The resulting values are σelνp = 18 ± 7 μb, σdνp = 33 ± 8 μb, σndνp = 91 ± 11 μb, and σtotνp 143 ± 17 μb, where the errors include statistical and systematic errors added in quadrature. © 1994 Springer-Verlag.
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