ELASTIC AND INELASTIC PHOTOPRODUCTION OF J PSI MESONS AT HERA/

Authors
AID S ANDREEV V ANDRIEU B APPUHN RD ARPAGAUS M BABAEV A BAHR J BAN J BAN Y BARANOV P BARRELET E BARSCHKE R BARTEL W BARTH M BASSLER U BECK E BEHREND HJ BELOUSOV A BERGER C BERNARDI G BERNET R BERTRANDCOREMANS G BESANCON M BEYER R BIDDULPH P BISPHAM P BIZOT JC BLOBEL V BORRAS K BOTTERWECK F BOUDRY V BRAEMER A BRAUNSCHWEIG W BRISSON V BRUNCKO D BRUNE C BUCHHOLZ R BUNGENER L BURGER J BUSSER FW BUNIATIAN A BURKE S BURTON MJ BUSCHHORN G CAMPBELL AJ CARLI T CHARLES F CHARLET M CLARKE D CLEGG AB CLERBAUX B COCKS S CONTRERAS JG CORMACK C COUGHLAN JA COURAU A COUSINOU MC COZZIKA G CRIEGEE L CUSSANS DG CVACH J DAGORET S DAINTON JB DAU WD DAUM K DAVID M DAVIS CL DELCOURT B DEROECK A DEWOLF EA DIRKMANN M DIXON P DINEZZA P DLUGOSZ W DOLLFUS C DOWELL JD DREIS HB DROUTSKOI A DULLMANN D DUNGER O DUHM H EBERT J EBERT TR ECKERLIN G EFREMENKO V EGLI S EICHLER R EISELE F EISENHANDLER E ELLISON RJ ELSEN E FEDOTOV A FEEKEN D FELST R FELTESSE J FERENCEI J FERRAROTTO F FLAMM K FLEISCHER M FLIESER M FLUGGE G FOMENKO A FOMINYKH B FORMANEK J FOSTER JM FRANKE G FRETWURST E GABATHULER E GABATHULER K GAEDE F GARVEY J GAYLER J GEBAUER M GELLRICH A GENZEL H GERHARDS R GLAZOV A GOERLACH U GOERLICH L GOGITIDZE N GOLDBERG M GOLDNER D GOLECBIERNAT K GONZALEZPINEIRO B GORELOV I GRAB C GRASSLER G GRASSLER R GREENSHAW T GRIFFITHS R GRINDHAMMER G GRUBER A GRUBER C HAACK J HAIDT D HAJDUK L HAMPEL M HAYNES WJ HEINZELMANN G HENDERSON RCW HENSCHEL H HERYNEK I HESS MF HILDESHEIM W HILLER KH HILTON CD HLADKY J HOEGER KC HOPPNER M HOFFMANN D HOLTOM T HORISBERGER R HUDGSON VL HUTTE M HUFNAGEL H IBBOTSON M ITTERBECK H JACHOLKOWSKA A JACOBSSON C JAFFRE M JANOTH J JANSEN T JONSSON L JOHANNSEN K JOHNSON DP JOHNSON L JUNG H KALMUS PIP KANDER M KANT D KASCHOWITZ R KATHAGE U KATZY J KAUFMANN HH KAUFMANN D KAZARIAN S KENYON IR KERMICHE S KEUKER C KIESLING C KLEIN M KLEINWORT C KNIES G KOHLER T KOHNE JH KOLANOSKI H KOLE F KOLYA SD KORBEL V KORN M KOSTKA P KOTELNIKOV SK KRAMERKAMPER T KRASNY MW KREHBIEL H KRUCKER D KRUGER U KRUNERMARQUIS U KUSTER H KUHLEN M KURCA T KURZHOFER J LACOUR D LAFORGE B LANDER R LANDON MPJ LANGE W LANGENEGGER U LAPORTE JF LEBEDEV A LEHNER F LEVERENZ C LEVONIAN S LEY C LINDSTROM G LINDSTROEM M LINK J LINSEL F LIPINSKI J LIST B LOBO G LOHMANDER H LOMAS JW LOPEZ GC LUBIMOV V LUKE D MAGNUSSEN N MALINOVSKI E MANI S MARACEK R MARAGE P MARKS J MARSHALL R MARTENS J MARTIN G MARTIN R MARTYN HU MARTYNIAK J MAVROIDIS T MAXFIELD SJ MCMAHON SJ MEHTA A MEIER K MERZ T MEYER A MEYER A MEYER H MEYER J MEYER PO MIGLIORI A MIKOCKI S MILSTEAD D MOECK J MOREAU F MORRIS JV MROCZKO E MULLER D MULLER G MULLER K MURIN P NAGOVIZIN V NAHNHAUER R NAROSKA B NAUMANN T NEWMAN PR NEWTON D NEYRET D NGUYEN HK NICHOLLS TC NIEBERGALL F NIEBUHR C NIEDZBALLA C NIGGLI H NISIUS R NOWAK G NOYES GW NYBERGWERTHER M OAKDEN M OBERLACK H OBROCK U OLSSON JE OZEROV D PALMEN P PANARO E PANITCH A PASCAUD C PATEL GD PAWLETTA H PEPPEL E PEREZ E PHILLIPS JP PIEUCHOT A PITZL D POPE G PRELL S PROSI R RABBERTZ K RADEL G RAUPACH F REIMER P REINSHAGEN S RICK H RIECH V RIEDLBERGER J RIEPENHAUSEN F RIESS S RIZVI E ROBERTSON SM ROBMANN P ROLOFF HE ROOSEN R ROSENBAUER K ROSTOVTSEV A ROUSE F ROYON C RUTER K RUSAKOV S RYBICKI K SAHLMANN N SANKEY DPC SCHACHT P SCHIEK S SCHLEIF S SCHLEPER P VONSCHLIPPE W SCHMIDT D SCHMIDT G SCHONING A SCHRODER V SCHUHMANN E SCHWAB B SEFKOW F SEIDEL M SELL R SEMENOV A SHEKELYAN V SHEVIAKOV I SHTARKOV LN SIEGMON G SIEWERT U SIROIS Y SKILLICORN IO SMIRNOV P SMITH JR SOLOCHENKO V SOLOVIEV Y SPECKA A SPIEKERMANN J SPIELMAN S SPITZER H SQUINABOL F STAROSTA R STEENBOCK M STEFFEN P STEINBERG R STEINER H STELLA B STELLBERGER A STIER J STIEWE J STOSSLEIN U STOLZE K STRAUMANN U STURCZINSKI W SUTTON JP TAPPROGGE S TASEVSKY M TCHERNYSHOV V TCHETCHELNITSKI S THEISSEN J THIEBAUX C THOMPSON G TRUOL P TURNAU J TUTAS J UELKES P USIK A VALKAR S VALKAROVA A VALLEE C VANDENPLAS D VANESCH P VANMECHELEN P VAZDIK Y VERRECCHIA P VILLET G WACKER K WAGENER A WAGENER M WALTHER A WAUGH B WEBER G WEBER M WEGENER D WEGNER A WENGLER T WERNER M WEST LR WILKSEN T WILLARD S WINDE M WINTER GG WITTEK C WUNSCH E ZACEK J ZARBOCK D ZHANG Z ZHOKIN A ZIMMER M ZOMER F ZSEMBERY J ZUBER K ZURNEDDEN M
Citation
S. Aid et al., ELASTIC AND INELASTIC PHOTOPRODUCTION OF J PSI MESONS AT HERA/, Nuclear physics. B, 472(1-2), 1996, pp. 3-31
Citations number
63
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. B → ACNP
ISSN journal
05503213
Volume
472
Issue
1-2
Year of publication
1996
Pages
3 - 31
Database
ISI
SICI code
0550-3213(1996)472:1-2<3:EAIPOJ>2.0.ZU;2-V
Abstract
Results on J/psi production in ep interactions in the Hi experiment at HERA are presented. The J/psi mesons are produced by almost real phot ons (Q(2) approximate to 0) and detected via their leptonic decays. Th e data have been taken in 1994 and correspond to an integrated luminos ity of 2.7 pb(-1). The yp cross section for elastic J/psi production i s observed to increase strongly with the center of mass energy. The cr oss section for diffractive J/psi production with proton dissociation is found to be of similar magnitude as the elastic cross section. Dist ributions of transverse momentum and decay angle are studied and found to be in accord with a diffractive production mechanism. For inelasti c J/psi production the total yp cross section, the distribution of tra nsverse momenta, and the elasticity of the J/psi are compared to NLO Q CD calculations in a colour singlet model and agreement is found. Diff ractive psi' production has been observed and a first estimate of the ratio to J/psi production in the HERA energy regime is given.