DEEP-INELASTIC SCATTERING EVENTS WITH A LARGE RAPIDITY GAP AT HERA

Authors
AHMED T AID S ANDREEV V ANDRIEU B APPUHN RD ARPAGAUS M BABAEV A BAEHR J BAN J BARANOV P BARRELET E BARTEL W BARTH M BASSLER U BECK HP BEHREND HJ BELOUSOV A BERGER C BERGSTEIN H BERNARDI G BERNET R BERTRANDCOREMANS G BESANCON M BIDDULPH P BIZOT JC BLOBEL V BORRAS K BOTTERWECK F BOUDRY V BRAEMER A BRASSE F BRAUNSCHWEIG W BRISSON V BRUNCKO D BRUNE C BUCHHOLZ R BUNGENER L BURGER J BUSSER FW BUNIATIAN A BURKE S BUSCHHORN G CAMPBELL AJ CARLI T CHARLES F CLARKE D CLEGG AB CLERBAUX B COLOMBO M CONTRERAS JG COUGHLAN JA COURAU A COUTURES C COZZIKA G CRIEGEE L CUSSANS DG CVACH J DAGORET S DAINTON JB DANILOV M DAU WD DAUM K DAVID M DEFFUR E DELCOURT B DELBUONO L DEROECK A DEWOLF EA DINEZZA P DOLLFUS C DOWELL JD DREIS HB DUBOC J DULLMANN D DUNGER O DUHM H EBERT J EBERT TR ECKERLIN G EFREMENKO V EGLI S EHRLICHMANN H EICHENBERGER S EICHLER R EISELE F EISENHANDLER E ELLISON RJ ELSEN E ERDMANN M EVRARD E FAVART L FEDOTOV A FEEKEN D FELST R FELTESSE J FERENCEI J FERRAROTTO F FLAMM K FLEISCHER M FLIESER M FLUGGE G FOMENKO A FOMINYKH B FORBUSH M FORMANEK J FOSTER JM FRANKE G FRETWURST E GABATHULER E GABATHULER K GAMERDINGER K GARVEY J GAYLER J GEBAUER M GELLRICH A GENZEL H GERHARDS R GOERLACH U GOERLICH L GOGITIDZE N GOLDBERG M GOLDNER D GONZALEZPINEIRO B GOODALL AM GORELOV I GORITCHEV P GRAB C GRASSLER H GRASSLER R GREENSHAW T GRINDHAMMER G GRUBER A GRUBER C HAACK J HAIDT D HAJDUK L HAMON O HAMPEL M HANLON EM HAPKE M HAYNES WJ HEATHERINGTON J HEDBERG V HEINZELMANN G HENDERSON RCW HENSCHEL H HERMA R HERYNEK I HESS MF HILDESHEIM W HILL P HILLER KH HILTON CD HLADKY J HOEGER KC HOPPNER M HORISBERGER R HUET P HUFNAGEL H IBBOTSON M ITTERBECK H JABIOL MA JACHOLKOWSKA A JACOBSSON C JAFFRE M JANOTH J JANSEN T JONSSON L JOHANNSEN K JOHNSON DP JOHNSON L JUNG H KALMUS PIP KANT D KASCHOWITZ R KASSELMANN P KATHAGE U KAUFMANN HH KAZARIAN S KENYON IR KERMICHE S KEUKER C KIESLING C KLEIN M KLEINWORT C KNIES G KO W KOHLER T KOLANOSKI H KOLE F KOLYA SD KORBEL V KORN M KOSTKA P KOTELNIKOV SK KRASNY MW KREHBIEL H KRUCKER D KRUGER U KRUNERMARQUIS U KUBENKA JP KUSTER H KUHLEN M KURCA T KURZHOFER J KUZNIK B LACOUR D LAMARCHE F LANDER R LANDON MPJ LANGE W LANIUS P LAPORTE JF LEBEDEV A LEVERENZ C LEVONIAN S LEY C LINDNER A LINDSTROM G LINSEL F LIPINSKI J LIST B LOCH P LOHMANDER H LOPEZ GC LUKE D MAGNUSSEN N MALINOVSKI E MANI S MARACEK R MARAGE P MARKS J MARSHALL R MARTENS J MARTIN R MARTYN HU MARTYNIAK J MASON S MAVROIDIS T MAXFIELD SJ MCMAHON SJ MEHTA A MEIER K MERCER D MERZ T MEYER CA MEYER H MEYER J MIKOCKI S MILSTEAD D MOREAU F MORRIS JV MULLER G MULLER K MURIN P NAGOVIZIN V NAHNHAUER R NAROSKA B NAUMANN T NEWMAN PR NEWTON D NEYRET D NGUYEN HK NIEBERGALL F NIEBUHR C NISIUS R NOWAK G NOYES GW NYBERGWERTHER M OBERLACK H OBROCK U OLSSON JE PANARO E PANITCH A PASCAUD C PATEL GD PEPPEL E PEREZ E PHILLIPS JP PICHLER C PITZL D POPE G PRELL S PROSI R RADEL G RAUPACH F REIMER P REINSHAGEN S RIBARICS P RIECH V RIEDLBERGER J RIESS S RIETZ M ROBERTSON SM ROBMANN P ROLOFF HE ROOSEN R ROSENBAUER K ROSTOVTSEV A ROUSE F ROYON C RUTER K RUSAKOV S RYBICKI K RYLKO R SAHLMANN N SANCHEZ E SANKEY DPC SAVITSKY M SCHACHT P SCHIEK S SCHLEPER P VONSCHLIPPE W SCHMIDT C SCHMIDT D SCHMIDT G SCHONING A SCHRODER V SCHUHMANN E SCHWAB B SCHWIND A SEEHAUSEN U SEFKOW F SEIDEL M SELL R SEMENOV A SHEKELYAN V SHEVIAKOV I SHOOSHTARI H SHTARKOV LN SIEGMON G SIEWERT U SIROIS Y SKILLICORN IO SMIRNOV P SMITH JR SOLOVIEV Y SPITZER H STAROSTA R STEENBOCK M STEFFEN P STEINBERG R STELLA B STEPHENS K STIER J STIEWE J STOSSLEIN U STRACHOTA J STRAUMANN U STRUCZINSKI W SUTTON JP TAPPROGGE S TAYLOR RE TCHERNYSHOV V THIEBAUX C THOMPSON G TICHOMIROV I TRUOL P TURNAU J TUTAS J UELKES P USIK A VALKAR S VALKAROVA A VALLEE C VANESCH P VANMECHELEN P VARTAPETIAN A VAZDIK Y VECKO M VERRECCHIA P VILLET G WACKER K WAGENER A WALKER IW WALTHER A WEBER G WEBER M WEGENER D WEGNER A WELLISCH HP WEST LR WILLARD S WINDE M WINTER GG WOLFF T WRIGHT AE WUNSCH E WULFF N YIOU TP ZACEK J ZHANG Z ZIMMER M ZIMMERMANN W ZOMER F ZUBER K
Citation
T. Ahmed et al., DEEP-INELASTIC SCATTERING EVENTS WITH A LARGE RAPIDITY GAP AT HERA, Nuclear physics. B, 429(3), 1994, pp. 477-502
Citations number
49
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. B → ACNP
ISSN journal
05503213
Volume
429
Issue
3
Year of publication
1994
Pages
477 - 502
Database
ISI
SICI code
0550-3213(1994)429:3<477:DSEWAL>2.0.ZU;2-L
Abstract
Evidence is presented using data taken with the H1 detector at HERA fo r a class of deep inelastic electron-proton scattering (DIS) events (5 < Q(2) < 120GeV(2)) at low Bjorken-x (10(-4) < x < 10(-2)) which have almost no hadronic energy flow in a large interval of pseudo-rapidity around the proton remnant direction and which cannot be attributed to our present understanding of DIS and fluctuations in final state hadr onic fragmentation. From an integrated luminosity of 273 nb(-1) 734 ev ents, that is about 5% of the total DIS sample, have no energy deposit ion greater than 400 MeV forward of laboratory pseudo-rapidity eta(max ) = 1.8 up to the largest measurable pseudorapidity of about 3.65. Evi dence that about 10% of observed rapidity gap events are exclusive vec tor meson electroproduction is presented. Good descriptions of the dat a are obtained using models based either on a vector meson dominance l ike picture, which includes a large fraction of inelastic virtual phot on dissociation, or on deep inelastic electron-pomeron scattering in w hich the partonic sub-structure of the latter is resolved.