Observation of Hard Processes in Rapidity Gap

V. Andreev,B. Andrieu,M. Arpagaus,A. Babaev,J. Baehr,P. Baranov,E. Barrelet,W. Bartel,M. Barth,U. Bassler,H. P. Beck,H.-J. Behrend,A. Belousov,Ch. Berger,H. Bergstein,G. Bernardi,R. Bernet,G. Bertrand-Coremans,M. Besan,R. Beyer,P. Biddulph,J. C. Bizot,V. Blobel,K. Borras,F. Botterweck,V. Boudry,A. Braemer,F. Brasse,W. Braunschweig,V. Brisson,D. Bruncko,C. Brune,R. Buchholz,A. Buniatian,S. Burke,G. Buschhorn,A. J. Campbell,T. Carli,F. Charles,D. Clarke,A. B. Clegg,B. Clerbaux,M. Colombo,J. G. Contreras,J. A. Coughlan,A. Courau,Ch. Coutures,G. Cozzika,L. Criegee,D. G. Cussans,J. Cvach,S. Dagoret,J. B. Dainton,M. Danilov,W. D. Dau,K. Daum,M. David,E. De ur,B. Delcourt,L. Del Buono,A. De Roeck,E. A. De Wolf,P. Di Nezza,C. Dollfus,J. D. Dowell,H. B. Dreis, V. Droutskoi,J. Duboc,H. Duhm, J. Ebert,T. R. Ebert,G. Eckerlin,V. Efremenko,S. Egli,H. Ehrlichmann,S. Eichenberger,R. Eichler,F. Eisele,E. Eisenhandler,R. J. Ellison,E. Elsen,M. Erdmann,W. Erdmann,E. Evrard,L. Favart,A. Fedotov,D. Feeken,R. Felst,J. Feltesse,J. Ferencei,F. Ferrarotto,K. Flamm,M. Fleischer,M. Flieser,G. Fl ugge,A. Fomenko,B. Fominykh,M. Forbush,J. M. Foster,G. Franke,E. Fretwurst,E. Gabathuler,K. Gabathuler,K. Gamerdinger,J. Garvey,J. Gayler,M. Gebauer,A. Gellrich,H. Genzel,R. Gerhards,U. Goerlach,L. Goerlich,N. Gogitidze,M. Goldberg,D. Goldner,B. Gonzalez-Pineiro, A. M. Goodall,I. Gorelov,P. Goritchev,C. Grab,T. Greenshaw,G. Grindhammer,A. Gruber,C. Gruber,J. Haack,D. Haidt,L. Hajduk,O. Hamon,M. Hampel, E. M. Hanlon,M. Hapke,W. J. Haynes,J. Heatherington,G. Heinzelmann, R. C. W. Henderson,H. Henschel,R. Herma,I. Herynek, M. F. Hess,W. Hildesheim,P. Hill,K. H. Hiller,C. D. Hilton,J. Hladk,K. C. Hoeger,R. Horisberger,Ph. Huet,H. Hufnagel,M. Ibbotson,H. Itterbeck,M.-A. Jabiol,A. Jacholkowska,C. Jacobsson,J. Janoth,T. Jansen,K. Johannsen,D. P. Johnson,L. Johnson,H. Jung,P. I. P. Kalmus,D. Kant,R. Kaschowitz,P. Kasselmann,U. Kathage, H. H. Kaufmann,S. Kazarian,I. R. Kenyon,S. Kermiche,C. Keuker,C. Kiesling,M. Klein,C. Kleinwort,G. Knies,W. Ko,H. Kolanoski,F. Kole,S. D. Kolya,V. Korbel,M. Korn,P. Kostka,S. K. Kotelnikov, M. W. Krasny,H. Krehbiel,J. P. Kubenka,M. Kuhlen,J. Kurzh ofer,B. Kuznik,D. Lacour,F. Lamarche,R. Lander,M. P. J. Landon, W. Lange,P. Lanius,J.-F. Laporte,A. Lebedev,C. Leverenz,S. Levonian,Ch. Ley,A. Lindner,F. Linsel,J. Lipinski,P. Loch,H. Lohmander, G. C. Lopez,V. Lubimov,N. Magnussen,E. Malinovski,S. Mani,P. Marage,J. Marks,R. Marshall,J. Martens,R. Martin,H.-U. Martyn,J. Martyniak,S. Masson,T. Mavroidis,S. J. Max eld,S. J. McMahon,A. Mehta, K. Meier,D. Mercer,T. Merz,H. Meyer,J. Meyer,S. Mikocki,D. Milstead,F. Moreau,J. V. Morris,V. Nagovizin,R. Nahnhauer,B. Naroska,P. R. Newman,D. Newton,D. Neyret,H. K. Nguyen,F. Niebergall,C. Niebuhr,R. Nisius,G. Nowak,G. W. Noyes,H. Oberlack,U. Obrock,J. E. Olsson,E. Panaro,A. Panitch,C. Pascaud,G. D. Patel,E. Peppel,E. Perez,J. P. Phillips,Ch. Pichler,D. Pitzl,G. Pope, S. Prell,R. Prosi,P. Reimer,S. Reinshagen,P. Ribarics,H. Rick,V. Riech,J. Riedlberger,S. Riess,M. Rietz, S. M. Robertson,P. Robmann,H. E. Rolo,R. Roosen,K. Rosenbauer,A. Rostovtsev,F. Rouse,C. Royon,S. Rusakov,K. Rybicki,R. Rylko,N. Sahlmann,E. Sanchez,D. P. C. Sankey

semanticscholar（2007）

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摘要

Events with no hadronic energy ow in a large interval of pseudo-rapidity in the proton direction are observed in photon-proton interactions at an average centre of mass energy < p s p > of 200 GeV. These events are interpreted as photon diirac-tive dissociation. Evidence for hard scattering in photon diiractive dissociation is demonstrated using inclusive single particle spectra, thrust as a function of transverse energy, and the observation of jet production. The data can be described by a Monte Carlo calculation including hard photon-Pomeron scattering.

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