OBSERVATION OF DIRECT PROCESSES IN PHOTOPRODUCTION AT HERA

被引：86

作者：

DERRICK, M

KRAKAUER, D

MAGILL, S

MUSGRAVE, B

REPOND, J

REPOND, S

STANEK, R

TALAGA, RL

THRON, J

ARZARELLO, F

AYAD, R

BARI, G

BASILE, M

BELLAGAMBA, L

BOSCHERINI, D

BRUNI, A

BRUNI, G

BRUNI, P

ROMEO, GC

CASTELLINI, G

CHIARINI, M

CIFARELLI, L

CINDOLO, F

CIRALLI, F

CONTIN, A

DELPAPA, C

DAURIA, S

FRASCONI, F

GIUSTI, P

IACOBUCCI, G

LAURENTI, G

LEVI, G

LIN, Q

MACCARRONE, G

MARGOTTI, A

MASSAM, T

NANIA, R

NEMOZ, C

PALMONARI, F

SARTORELLI, G

TIMELLINI, R

GARCIA, YZ

ZICHICHI, A

BARGENDE, A

CRITTENDEN, J

DESCH, K

DIEKMANN, B

DOEKER, T

FELD, L

FREY, A

机构：

[1] INFN, BOLOGNA, ITALY

[2] UNIV BOLOGNA, I-40126 BOLOGNA, ITALY

[3] UNIV BONN, INST PHYS, W-5300 BONN, GERMANY

[4] UNIV BRISTOL, HH WILLS PHYS LAB, BRISTOL BS8 1TL, AVON, ENGLAND

[5] BROOKHAVEN NATL LAB, UPTON, NY 11973 USA

[6] UNIV CALABRIA, DEPT PHYS, COSENZA, ITALY

[7] INFN, COSENZA, ITALY

[8] COLUMBIA UNIV, NEVIS LABS, IRVINGTON, NY USA

[9] INST NUCL PHYS, PL-31342 KRAKOW, POLAND

[10] STANISLAW STASZIC UNIV MIN & MET, FAC PHYS & NUCL TECHNIQUES, PL-30059 KRAKOW, POLAND

[11] JAGIELLONIAN UNIV, DEPT PHYS, PL-31007 KRAKOW, POLAND

[12] DESY, W-2000 HAMBURG 52, GERMANY

[13] DESY, ZEUTHEN INST HOCHENERGIEPHYS, ZEUTHEN, GERMANY

[14] UNIV FLORENCE, I-50121 FLORENCE, ITALY

[15] INFN, FLORENCE, ITALY

[16] INFN, LAB NAZL FRASCATI, FRASCATI, ITALY

[17] UNIV FREIBURG, INST PHYS, W-7800 FREIBURG, GERMANY

[18] UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW G12 8QQ, SCOTLAND

[19] UNIV HAMBURG, INST EXPTL PHYS 1, W-2000 HAMBURG 13, GERMANY

[20] UNIV HAMBURG, INST EXPTL PHYS 2, W-2000 HAMBURG 13, GERMANY

[21] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, HIGH ENERGY NUCL PHYS GRP, LONDON SW7 2AZ, ENGLAND

[22] UNIV IOWA, DEPT PHYS & ASTRON, IOWA CITY, IA 52242 USA

[23] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST KERNPHYS, W-5170 JULICH 1, GERMANY

[24] KOREA UNIV, SEOUL, SOUTH KOREA

[25] LOUISIANA STATE UNIV, DEPT PHYS & ASTRON, BATON ROUGE, LA 70803 USA

[26] UNIV AUTONOMA MADRID, DEPT FIS TEOR, MADRID 34, SPAIN

[27] UNIV MANITOBA, DEPT PHYS, WINNIPEG R3T 2N2, MANITOBA, CANADA

[28] MCGILL UNIV, DEPT PHYS, MONTREAL H3A 2T5, QUEBEC, CANADA

[29] MOSCOW MV LOMONOSOV STATE UNIV, INST NUCL PYS, MOSCOW, RUSSIA

[30] NIKHEF, AMSTERDAM, NETHERLANDS

[31] OHIO STATE UNIV, DEPT PHYS, COLUMBUS, OH 43210 USA

[32] UNIV OXFORD, DEPT PHYS, OXFORD, ENGLAND

[33] UNIV PADUA, DIPARTIMENTO FIS, I-35100 PADUA, ITALY

[34] INFN, PADUA, ITALY

[35] PENN STATE UNIV, DEPT PHYS, UNIV PK, PA 16802 USA

[36] INFN, ROME, ITALY

[37] UNIV ROMA LA SAPIENZA, DIPARTIMENTO FIS, I-00185 ROME, ITALY

[38] RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND

[39] UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA

[40] UNIV GESAMTHSCH SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN 21, GERMANY

[41] TEL AVIV UNIV, SCH PHYS, IL-69978 TEL AVIV, ISRAEL

[42] UNIV TOKYO, INST NUCL STUDY, TOKYO 113, JAPAN

[43] TOKYO METROPOLITAN UNIV, DEPT PHYS, TOKYO 158, JAPAN

[44] UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10124 TURIN, ITALY

[45] INFN, TURIN, ITALY

[46] TORINO UNIV, FAC SCI 2, ALESSANDRIA, ITALY

[47] INFN, ALESSANDRIA, ITALY

[48] UNIV TORONTO, DEPT PHYS, TORONTO M5S 1A1, ONTARIO, CANADA

[49] UNIV LONDON UNIV COLL, DEPT PHYS & ASTRON, LONDON WC1E 6BT, ENGLAND

[50] VIRGINIA POLYTECH INST & STATE UNIV, DEPT PHYS, BLACKSBURG, VA 24061 USA

来源：

PHYSICS LETTERS B | 1994年 / 322卷 / 03期

关键词：

D O I：

10.1016/0370-2693(94)91121-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Jets in photoproduction events have been studied with the ZEUS detector for gammap centre-of-mass energies ranging from 130 to 2 50 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.

引用

页码：287 / 300

页数：14

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