Total photoproduction cross section measurement at HERA energies

T Ahmed ,H Spitzer,R Herma,G Buschhorn,E Gabathuler,M Eberle,P Verrecchia,M Ibbotson,S Kermiche,L Hajduk,J Martyniak,M Forbush,P Goritchev,F Ferrarotto,A Semenov,G Lindström,A Lebedev,V Tchernyshov,D Düllmann,G Franke,V Korbel,J Tutas,B Naroska,R Roosen,Y Vazdik,A Wegner,D Haidt,B Stella,W.J Haynes,L.A Womersley,K Stephens,E Ryseck,N Magnussen,E Barrelet,J Ebert,I Tichomirov,M Zimmer,M Winde,R Eichler,H Genzel,H Bärwolff,P Truöl,D Feeken,A Gellrich,M Nyberg,J Garvey,I Sheviakov,Ch Berger,R Vick,H Henschel,R Marshall,O Dünger,G Siegmon,J Turnau,G Grindhammer,R Prosi,I Herynek,S Mikocki,P Hill,H Shooshtari,J Kurzhöfer,J Gayler,H Lohmander,J Harjes,P Kasselmann,F Moreau,S Levonian,H Krehbiel,L Criegee,A Usik,J Stier,E Eisenhandler,Th Wolff,J Strachota,F Kole,F Charles,K Johannsen,W.D Dau,J Duboc,K Müller,K Gamerdinger,C Leverenz,M Kuhlen,M Arpagaus,N Wulff,E Evrard,O Hamon,A De Roeck,R Kaschowitz,G Weber,W Bartel,U Seehausen,W Hildesheim,J Heatherington,R Gerhards,Ph Huet,V Nagovizin,E Peppel,P Ribarics,M Rudowicz,U Gensch,M Hapke,C Jacobsson,W Zimmermann,H Obrock,W Pilgram,A Lindner,C Trenkel,B Delcourt,S Mani,C Dollfus,S Eichenberger,R Steinberg,A Buniatian,C.D Hilton,U Straumann,J Feltesse,S Masson,J Formánek,S Egli,J Riedlberger,H Hufnagel,M Rietz,U Krüger,M Savitsky,F Niebergall,A Mavroidis,W Struczinski,K Wacker,M Seman,K Rauschnabel,J Marks,A Courau,U Berthon,S Kasarian,T Merz,W Braunschweig,Y Soloviev,J Bán,P Kostka,M Vecko,V Schröder,C Kiesling,J Haack,H Grässler,B Fominykh,R Hedgecock,J Cvach,N Sahlmann,T Greenshaw,M Gennis,P Dingus,L Del Buono,M Korn,M Fleischer,K Rybicki,G Heinzelmann,E Malinovski,A Rostovtsev,C Zeitnitz,V Efremenko,M Steenbock,V Milone,G Villet,U Bassler,D Handschuh,M Danilov,J.C Bizot,R Felst,V Brisson,L Goerlich,F Eisele,W Von Schlippe,U Kathage,U Siewert,P Lanius,W Flauger,G Bertrand-Coremans,A Walther,D Lüers,G Knies,P Steffen,A Drescher,S Orenstein,J Moreels,R Grässler,Ch Ley,A Leuschner,E Deffur,H Küster,J Ferencei,R Haydar,D Wegener,P Biddulph,A Schwind,C Pascaud,G Cozzika,S Willard,H Bergstein,D Newton,Denis Johnson ,H Ziaeepour ,H Steiner ,T Naumann ,G Nowak ,A Belousov ,J Sacton ,P Flower ,J P Sutton ,C Schmidt ,J V Morris ,I F Fensome ,J Bürger ,H H Kaufmann ,D Schmidt ,U Braun ,V Boudry ,Sarah Peters ,S A Murray ,P Smirnov ,G C Lopez ,T Carli ,E Fretwurst ,H U Martyn ,P Marage ,U Goerlach ,E Elsen ,P Schacht ,Y Feng ,F.w Büsser ,W Scobel ,T P Yiou ,M Goldberg ,C Kleinwort ,C Royon ,G Thompson ,S Bürke ,M A Jabiol ,N Ellis ,R Bernet ,A.e Wright ,Raivo Sell ,P Bosetti ,K Meier ,I Gorelov ,P Baranov ,L Johnson ,H B Dreis ,I O Skillicorn ,A Campbell ,W Schmitz ,A M Goodall ,G Flügge ,E Monnier ,Thomas Köhler ,Б И Кузник ,J P Phillips ,G D Patel ,D Krücker ,H.h Duhm ,L Smolík ,J F Laporte ,C Vallée ,A Babaev ,M Besançon ,R Lander ,R Martin ,E M Hanlon ,T Kurča ,S J Maxfield ,L Godfrey ,S D Kolya ,J Žáček ,P Loch ,H J Behrend ,Bernard Andrieu ,M Devel ,M W Krasny ,Patrick Fuhrmann ,S V Rusakov ,Helmut Greif ,D Gillespie ,J Hladký ,G G Winter ,H P Beck ,G Bernardi ,R J Thompson ,H Kolanoski ,H K Nguyen ,K C Hoeger ,A Mehta ,L Jönsson ,C Bourdarios ,H Meyer ,I W Walker ,F.w Brasse ,G W Noyes ,F Ould-Saada ,T R Ebert ,C Grab ,S.k Kotelnikov ,J D Dowell ,R C W Henderson ,K Borras ,P Staroba ,D Pitzl ,Richard E Taylor ,P Závada ,A W E Dann ,A Valkárová ,V Blobel ,P Schleper ,M Rüffer ,J B Dainton ,A Vartapetian ,Patrick Van Esch ,E Vogel ,L Urbán ,V Riech ,V Hedberg ,H P Wellisch ,Chris Meyer ,S Robertson ,J Meyer ,P Robmann ,H Oberlack ,R J Ellison ,Ch Pichler ,I R Kenyon ,C Grüber ,H Jung ,P I P Kalmus ,M Colombo ,Dan Levin ,M Jaffré ,D Clarke ,J P Kubenka ,V Shekelyan ,E Binder ,V A Andreev ,Rudolf Langkau ,C Coutures ,Josephine Morton ,E Sánchez ,J R Smith ,M David ,A Jachołkowska ,M Klein ,J Martens ,N Huot ,M Schulz ,H T Phillips ,J M Foster ,G A Beck ,P Reimer ,J A Coughlan ,J E Olsson ,M P J Landon ,D P C Sankey ,П Мурін ,Y Sirois ,M Erdmann ,A Fomenko ,F Raupach ,R Nisius ,D Bruncko ,S J Mcmahon ,G Eckerlin ,A.b Clegg ,A Fedotov ,Š Valkár ,P Hartz ,L Favart ,F Zomer

doi:10.1016/0370-2693(93)90277-o

Abstract

We present first results on the total photoproduction cross section measurement with the H1 detector at HERA. The data were extracted from low Q 2 collisions of 26.7 GeV electrons with 820 GeV protons. The γp total cross section has been measured by two independent methods in the γp center of mass energy range from 90 to 290 GeV. For an average center of mass energy of 195 GeV a value of σ tot ( γp) = 159 ± 7 (stat.) ± 20 (syst.) μb was obtained.

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