Scale influence on the energy dependence of photon-proton cross sections

S Aïd ,M Fleiser,C Dollfus ,A Droutskoi ,V Efremenko ,B Schwab ,H Oberlack ,R Eichler ,F.w Büsser ,E Panaro ,J G Contreras ,F Linsel ,R Beyer ,E A De Wolf ,M Lindstroem ,P Verrecchia ,M Fleischer ,D Bruncko ,A Wegner ,I R Kenyon ,T Haller ,L Criegee ,H Meyer ,N Gogitidze ,D Lüke ,M Goldberg ,G Weber ,C Wittek ,P Bispham ,P Steffen ,T R Ebert ,S Mikocki ,A Panitch ,J Zsembery ,Bogdan Povh ,H Henschel ,R Maraček ,S Willard ,M Winde ,T Wengler ,Y Vazdik ,Ch Berger ,R Gerhards ,I Sheviakov ,D Kant ,D Calvet ,A Fomenko ,F Metlica ,S J Maxfield ,G G Winter ,J Turnau ,S Schleif ,П Мурін ,G D Patel ,A Lebedev ,H J Behrend ,E Mroczko ,T Krämerkämper ,G Martin ,B Laforge ,L Hajduk ,R Barschke ,J Ebert ,G C Lopez ,T Hadig ,P R Newman ,F Rouse ,P Loch ,T Kurča ,M Barth ,A.b Clegg ,S.k Kotelnikov ,Patrick Van Esch ,M Weber ,C.d Hilton ,F Gaede ,D Newton ,K Rüter ,Ch Thiebaux ,I Négri ,Y Ban ,J A Coughlan ,Matías Rolf Hampel ,G Müller ,P I P Kalmus ,H B Dreis ,F Squinabol ,L Goerlich ,M W Krasny ,E Schuhmann ,D Clarke ,J Lipiński ,I Herynek ,S D Kolya ,M Taševský ,G W Noyes ,E Pérez ,M Hütte ,H Genzel ,I Gorelov ,S Schiek ,J H Köhne ,V Brisson ,A Babaev ,K Müller ,M Nyberg-Werther ,S Dagoret ,H Jung ,J P Sutton ,M J Burton ,L Jönsson ,S Tapprogge ,H Krehbiel ,D Haidt ,M David ,Z Zhang,H Spitzer ,C Keuker ,B Naroska ,P Smirnov ,S Robertson ,J E Olsson ,A Pieuchot ,D Cussans ,D Vandenplas ,D Hoffmann ,G Siegmon ,U Kathage ,G Cozzika ,M Oakden ,M Heß ,V Lubimov ,G Rädel ,M Besançon ,G Thompson ,P Bruel ,R Nahnhauer ,P Biddulph ,J Katzy ,D Lacour ,R Horisberger ,K Wacker ,J Garvey ,U Bassler ,J Martens ,W.d Dau ,W Hildesheim ,H Grässler ,P Uelkes ,M Klein ,D Milstead ,C Grüber ,F Sefkow ,J Bán ,R C W Henderson ,A Buniatian ,V Boudry ,K Stolze ,T C Nicholls ,P Reimer ,H Rick ,P Robmann ,W Długosz ,G Grindhammer ,C M Cormack ,G Bertrand-Coremans ,U Siewert ,U Langenegger ,K Flamm ,C Grab ,A Glazov ,J Bähr ,I O Skillicorn ,M Kander ,F Riepenhausen ,Benedict Martin Waugh ,T Carli ,M P J Landon ,A Belousov ,A Campbell ,K Gabathuler ,U Stößlein ,J Meyer ,S Bürke ,M Anderson ,A Fedotov ,F Moreau ,J Spiekermann ,P Zini ,L N Shtarkov ,T Nunnemann ,D Goldner ,Š Valkár ,P Dixon ,H U Martyn ,P Kostka ,G Franke ,E Eisenhandler ,B González-Pineiro ,K Rybicki ,O Dünger ,M Dirkmann ,A Specka ,J Hladký ,Thomas Köhler ,J M Foster ,J Ferencei ,G Nowak ,W Bartel ,G Pope ,A Meyer ,G Tsipolitis ,A.b Fahr ,P Schacht ,Thomas L C Jansen ,M Höppner ,G Heinzelmann ,U Straumann ,T Naumann ,A Valkárová ,P Truöl ,E Peppel ,C R Brune ,M Kuhlen ,D P C Sankey ,E Gabathuler ,S V Rusakov ,J V Morris ,R Marshall ,J W Lomas ,V Tchernyshov ,S Cocks ,F Lehner ,J Stier ,K Borras ,R Roosen ,A Gruber ,Y Soloviev ,F Ferrarotto ,W Braunschweig ,B Delcourt ,S Reinshagen ,C Kleinwort ,J Theissen ,V Korbel ,K Meier ,T Greenshaw ,Claude Vallée ,E Barrelet ,A Courau ,R Steinberg ,V Andreev ,J Tutas ,H Niggli ,A Usik ,V Nagovizin ,W Struczinski ,J Formánek ,R Buchholz ,P Van Mechelen ,J Feltesse ,G Bernardi ,G Knies ,F Eisele ,J Moeck ,R Kaschowitz ,A Zhokin ,W Lange ,K Daum ,J Gayler ,A Jachołkowska ,P Marage ,A Braemer ,H Steiner ,B Stella ,K H Hiller ,W Brückner ,Denis Johnson ,Aurélie Wagener ,G Schmidt ,R Martin ,A Rostovtsev ,D Krücker ,K Rosenbauer ,F Niebergall ,K.t Donovan ,D Müller ,S J Mcmahon ,V Schröder ,T Wilksen ,M Beck ,A Mehta ,D M Jansen ,P.-O Meyer ,J Martyniak ,R.k Griffiths ,J Janoth ,J Stiewe ,M Kausch ,B Clerbaux ,D Ozerov ,S Kermiche ,E Malinovski ,J Žáček ,Bernard Andrieu ,Κ Zuber ,L Favart ,M Wobisch ,C Pascaud ,S Prell ,E Tzamariudaki ,A Semenov ,G Flügge ,H E Roloff ,K Golec-Biernat ,J B Dainton ,Y Sirois ,W Erdmann ,E Elsen ,G Eckerlin ,H K Nguyen ,D Schmidt ,A De Roeck ,J Bürger ,W.j Haynes ,T Holtom ,H H Kaufmann ,G Villet ,J Marks ,L Lytkin ,P Palmen ,S Tchetchelnitski ,S Levonian ,K Hewitt ,M Charlet ,V Blobel ,V L Hudgson ,L Büngener ,A Schöning ,D Zarbock ,H P Beck ,M Werner ,S Spielman ,M Erdmann ,H Itterbeck ,S Egli ,H Pawletta ,M Wagener ,H Kolanoski ,A Migliori ,C Jacobsson ,M Jaffré ,R Todenhagen ,V Solochenko ,V Shekelyan ,H.h Duhm ,C Royon ,R Felst ,C Niebuhr ,C Kiesling ,E Rizvi ,P Schleper ,B List ,P Di Nezza ,C L Davis ,Raivo Sell ,H Küster ,F Zomer ,S Rieß ,A Stellberger ,M Ibbotson ,O Kaufmann ,G Lobo ,D Wegener ,B Heinemann ,J Kurzhöfer ,K Rabbertz ,N Magnussen ,T Mavroidis ,Ch Niedzballa ,M C Cousinou ,J Cvach ,M Gebauer ,J D Dowell ,J Steinhart ,E Fretwurst ,L.r West ,P Baranov ,G Lindström ,J.c Bizot ,D Pitzl ,J P Phillips ,E Wünsch ,W Von Schlippe ,Shahé S Kazarian ,M Zurnedden

doi:10.1016/s0370-2693(96)01594-8

Scale influence on the energy dependence of photon-proton cross sections

S Aïd , M Fleiser + Show 394 more

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https://doi.org/10.1016/s0370-2693(96)01594-8

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Journal: Physics Letters B	Publication Date: Jan 1, 1997
Citations: 4

Affiliation: Max Planck Society

#Dependence Of Cross Section #Photon-proton Cross Section + Show 8 more

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Abstract

The scale dependence of the evolution of photoproduction cross sections with the photon-proton centre of mass energy W is studied using low Q 2 < 0.01 GeV 2 e + p interactions collected by the H1 experiment at HERA. The value of the largest transverse momentum of a charged particle in the photon fragmentation region is used to define the hard scale. The slope of the W dependence of the cross section is observed to increase steeply with increasing transverse momentum. The result is compared to measurements of the Q 2 evolution of the W dependence of the virtual photon-proton cross section. Interpretations in terms of QCD and in terms of Regge phenomenology are discussed.

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