DIFFRACTIVE DIJET CROSS-SECTIONS IN PHOTOPRODUCTION AT HERA

Authors
BREITWEG J DERRICK M KRAKAUER D MAGILL S MIKUNAS T MUSGRAVE B REPOND J STANEK R TALAGA RL YOSHIDA R ZHANG H MATTINGLY MCK ANSELMO F ANTONIOLI P BARI G BASILE M BELLAGAMBA L BOSCHERINI D BRUNI A BRUNI G ROMEO GC CASTELLINI G CIFARELLI L CINDOLO F CONTIN A COPPOLA N CORRADI M DEPASQUALE S GIUSTI P IACOBUCCI G LAURENTI G LEVI G MARGOTTI A MASSAM T NANIA R PALMONARI F PESCI A POLINI A SATORELLI G GARCIA YZ ZICHICHI A AMELUNG C BORNHEIM A BROCK I COBOKEN E CRITTENDEN J DEFFNER R ECKERT M GROTHE M HARTMANN H HEINLOTH K HEINZ L HILGER E JAKOB HP KAPPES A KATZ UF KERGER R PAUL E PFEIFFER M STAMM J WIEBER H BAILEY DS CAMPBELLROBSON S COTTINGHAM WN FOSTER B HALLWILTON R HEATH GP HEATH HF MCFALL JD PICCIONI D ROFF DG TAPPER RJ AYAD R CAPUA M IANNOTTI L SCHIOPPA M SUSINNO G KIM JY LEE JH LIM LT PAC MY CALDWELL A CARTIGLIA N JING Z LIU W MELLADO B PARSONS JA RITZ J SAMPSON S SCIULLI F STRAUB PB ZHU Q BORZEMSKI P CHWASTOWSKI J ESKREYS A FIGIEL J KLIMEK K PRZYBYCIEN MB ZAMIEJSKI L ADAMCZYK L BEDAAREK B BUKOWY M CZERMAK AM JELEN K KISIELEWSKA D KOWALSKI T PRZYBYCIEN M RULIKOWSKAZAREBSKA E SUSZYCKI L ZAJAC J DULINSKI Z KOTANSKII A ABBIENDI G BAUERDICK LAT BEHRENS U BEIER H BIENLEIN JK DESLER K DREWS G FRICKE U GIALAS I GOEBEL F GOTTLICHER P GRACIANI R HAAS T HAIN W HASELL D HEBBEL E JOHNSON KF KASEMANN M KOCH W KOTZ U KOWALSKI H LINDEMANN L LOHR B MILEWSKI J MILITE M MONTEIRO T NG JST NOTZ D PARK IH PELLEGRINO A PELUCCHI F PIOTRZKOWSKI K ROHDE M ROLDAN J RYAN JJ SAVIN AA SCHNEEKLOTH U SCHWARZER O SELONKE F STONJEK S SURROW B TASSI E WESTPHAL D WOLF G WOLLMER U YOUNGMAN C ZEUNER W BUROW BD COLDEWEY C GRABOSCH HJ MEYER A SCHLENSTEDT S BARBAGLI G GALLO E PELFER P MACCARRONE G VOTANO L BAMBERGER A EISENHARDT S MARKUN P RAACH H TREFZGER T WOLFLE S BROMLEY JT BROOK NH BUSSEY PJ DOYLE AT MACDONALD N SAXON DH SINCLAIR LE SKILLICORN IO STRICKLAND E WAUGH R BOHNET I GENDNER N HOLM U MEYERLARSEN A SALEHI H WICK K GARFAGNINI A GLADILIN LK HORSTMANN D KCIRA D KLANNER R LOHRMANN E POELZ G SCHOTT W ZETSCHE F BACON TC BUTTERWORTH I COLE JE HOWELL G LAMBERTI L LONG KR MILLER DB PAVEL N PRINIAS A SEDGBEER JK SIDERIS D WALKER R MALLIK T WANG SM WU JT CLOTH P FILGES D FLECK JI ISHII T KUZE M SUZUKI I TOKUSHUKU K YAMADA S YAQMAUCHI K YAMAZAKI Y HONG SJ LEE SB NAM SW PARK SK BARREIRO F FERNANDEZ JP GARCIA G GLASMAN C HERNANDEZ JM HERVAS L LABARGA L MARTINEZ M DELPESO J PUGA J TERRON J DETROCONIZ JF CORRIVEAU F HANNA DS HARTMAAN J HUNG LW MURRAY WN OCHS A RIVELINE M STAIRS DG STLAURENT M ULLMANN R TSURUGAI T BASHKIROV V DOLGOSHEIN BA STIFUTKIN A BASHINDZHAGYAN GL ERMOLOV PF GOLUBKOV YA KHEIN LA KOROTKOVA NA KORZHAVINA IA KUZMIN VA LUKINA OY PROSKURYAKOV AS SHCHEGLOVA LM SOLOMIN AN ZOTKIN SA BOKEL C BOTJE M BRUMMER N ENGELEN J KOFFEMAN E KOOIJMAN P VANSIGHEM A TIECKE E TUNING N VERKERKE W VOSSEBELD J WIGGERS L DEWOLF E ACOSTA D BYLSMA B DURKIN LS GILMORE J GINSBURG CM KIM CL LING TY NYLANDER P ROMANOWSKI TA BLAIKLEY HE CASHMORE RJ COOPERSARKAR AM DEVENISH RCE EDMONDS JK GROSSEKNETTER J HARNEW N NATH C NOYES VA QUADT A RUSKE O TICKNER JR WALCZAK R WATERS DS BERTOLIN A BRUGNERA R CARLIN R DALCORSO F DOSSELLI U LIMENTANI S MORANDIN M POSOCCO M STANCO L STROILI R VOCI C BULMAHN J OH BY OKRASINSKI JR TOOTHACKER WS WHITMORE JJ DAGOSTINI G MARINI G NIGRO A RASO M HART JC MCCUBBIN NA SHAH TP EPPERSON D HEUSCH C RAHN JT SADROZINSKI HFW SEIDEN A WICHMANN R WILLIAMS DC ABRAMOWICZ H BRISKIN G DAGAN S KANANOV S LEVY A ABE T FUSAYASU T INUZUKA M NAGANO K UMEMORI K YAMASHITA T HAMATSU R HIROSE T HOMMA K KITAMURA S MATSUSHITA T ARNEODO T CIRIO R COSTA M FERRERO MI MASELLI S MONACO V PERONI C PETRUCCI TC RUSPA M SACCHI R SOLANO A STAIANO A DARDO M BAILEY DC FAGERSTROEM CP GALEA R HARTNER GF JOE KK LEVMAN GM MARTIN JF ORR RS POLENZ S SABETFAKHRI A SIMMONS D TEUSCHER RJ BUTTERWORTH JM CATTERALL CD HAYES ME JONES TW LANE JB SAUNDERS RL SUTTON MR WING M CIBOROWSKI J GRZELAK G KASPRZAK M NOWAK RJ PAWLAK JM PAYLAK R TYMIENIECKA T WROBLEWSKI AK ZAKRZEWSKI JA ZARNECKI AF ADAMUS M DEPPE O EISENBERG Y HOCHMAN D KARSHON U BADGETT WF CHAPIN D CROSS R DASU S FOUDAS C LOVELESS RJ MATTINGLY S REEDER DD SMITH WH VAICIULIS A WODARCZYK M DESHPANDE A DHAWAN S HUGHES VW BHADRA S FRISKEN WR KHAKZAD M SCHMIDKE WB
Citation
J. Breitweg et al., DIFFRACTIVE DIJET CROSS-SECTIONS IN PHOTOPRODUCTION AT HERA, EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS, 5(1), 1998, pp. 41-56
Citations number
59
Categorie Soggetti
Physics, Particles & Fields
Journal title
EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS → ACNP
ISSN journal
14346044
Volume
5
Issue
1
Year of publication
1998
Pages
41 - 56
Database
ISI
SICI code
1434-6044(1998)5:1<41:DDCIPA>2.0.ZU;2-U
Abstract
Differential dijet cross sections have been measured with the ZEUS det ector for photoproduction events in which the hadronic final state con taining the jets is separated with respect to the outgoing proton dire ction by a large rapidity gap. The cross section has been measured as a function of the fraction of the photon (x(gamma)(OBS)) and pomeron ( beta(OBS)) momentum participating in the production of the dijet syste m. The observed x(gamma)(OBS) dependence shows evidence for the presen ce of a resolved- as well as a direct-photon component. The measured c ross section d sigma/d beta(OBS) increases as beta(OBS) increases indi cating that there is a sizeable contribution to dijet production from those events in which a large fraction of the pomeron momentum partici pates in the hard scattering. These cross sections and the ZEUS measur ements of the diffractive structure function carl be described by calc ulations ba-sed on parton densities ill the pomeron which evolve accor ding to the QCD evolution equations and include a substantial hard mom entum component of gluons in the pomeron.