Photoproduction of J = Mesons at HERAH 1 CollaborationAbstractWe

T. Ahmed, S. Aid,V. Andreev,B. Andrieu,R. Appuhn,M. Arpagaus,A. Babaev,J. Baehr,P. Baranov,E. Barrelet,W. Bartel,M. Barth,U. Bassler,H. Beck,H. Behrend,A. Belousov,C. Berger,H. Bergstein,G. Bernardi,R. Bernet,G. Bertrand-Coremans,M. Besan,R. Beyer,P. Biddulph,J. 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. Campbell,T. Carli,F. Charles,D. Clarke,A. B. Clegg,M. Colombo,J. G. Contreras,J. Coughlan,A. Courau,C. Coutures,G. Cozzika,L. Criegee,D. Cussans,J. Cvach,S. Dagoret,J. Dainton,M. Danilov,W. Dau,K. Daum,M. David,E. Ur,B. Delcourt,L. Buono,A. Roeck,E. Wolf,P. Nezza,C. Dollfus,J. Dowell,H. Dreis,J. Duboc,H. Duhm,J. Ebert,T. Ebert,G. Eckerlin,V. Efremenko,S. Egli,H. Ehrlichmann,S. Eichenberger,R. Eichler,F. Eisele,E. Eisenhandler, R. 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,A. Fomenko,B. Fominykh,M. Forbush,J. 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. González-Piñeiro,A. 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. Hanlon,M. Hapke,W. Haynes,J. Heatherington,V. Hedberg,G. Heinzelmann,R. Henderson,H. Henschel,R. Herma,I. Herynek,M. Heß,W. Hildesheim,P. Hill,K. Hiller,C. D. Hilton,J. Hladk,K. Hoeger,R. Horisberger,P. Huet,H. Hufnagel,M. Ibbotson,H. Itterbeck,M. Jabiol,A. Jachołkowska,C. Jacobsson,J. Janoth,T. Jansen,L. J. onsson,K. Johannsen,D. Johnson,L. Johnson,H. Jung,P. Kalmus,D. Kant,R. Kaschowitz,P. Kasselmann,U. Kathage,H. Kaufmann,S. Kazarian,I. Kenyon,S. Kermiche,C. Keuker,C. Kiesling,M. Klein,C. Kleinwort,G. Knies,W. Ko,H. Kolanoski,F. Kole,S. Kolya,V. Korbel,M. Korn,P. Kostka,S. Kotelnikov,M. Krasny,H. Krehbiel,J. Kubenka,M. Kuhlen,J. Ofer,B. Kuznik,D. Lacour,F. Lamarche,R. Lander,M. Landon,W. Lange,P. Lanius,J. Laporte,A. Lebedev,C. Leverenz,S. Levonian,C. Ley,A. Lindner,F. Linsel,J. Lipinski,P. Loch,H. Lohmander,G. C. Lopez,N. Magnussen,E. Malinovski,S. Mani,P. Marage,J. Marks,R. Marshall,J. Martens,R. Martin,H. Martyn,J. Martyniak,S. Masson,T. Mavroidis,S. eld, S. McMahon,A. Mehta,K. Meier,D. Mercer,T. Merz,C. Meyer,H. Meyer,J. Meyer,S. Mikocki,D. Milstead,F. Moreau,J. Morris,V. Nagovizin,R. Nahnhauer,B. Naroska,T. Naumann,P. Newman,D. Newton,D. Neyret,H. Nguyen,F. Niebergall,C. Niebuhr,R. Nisius,G. Nowak,G. Noyes,M. Nyberg-Werther,H. Oberlack,U. Obrock,J. Olsson,E. Panaro,A. Panitch,C. Pascaud,G. Patel,E. Peppel,E. Perez,J. Phillips,C. Pichler,D. Pitzl,G. Pope,S. Prell,R. Prosi,F. Raupach,P. Reimer,S. Reinshagen,P. Ribarics,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. Ryłko,N. Sahlmann,E. Sanchez,D. Sankey,M. Savitsky,P. Schacht,S. Schiek,P. Schleper,W. Schlippe,C. Schmidt,D. Schmidt,G. Schmidt,E. Schuhmann,B. Schwab,A. Schwind, U. Seehausen,F. Sefkow,M. Seidel, R. Sell,A. Semenov,V. Shekelyan,I. Sheviakov

semanticscholar（1994）

引用 0|浏览2

暂无评分

摘要

We present a study of J== meson production in collisions of 26:7 GeV electrons with 820 GeV protons, performed with the H1-detector at the HERA collider at DESY. The J== mesons are detected via their leptonic decays both to electrons and muons. Requiring exactly two particles in the detector, a cross section of (ep ! J==X) = (8:8 2:0 2:2) nb is determined for 30 GeV W p 180 GeV and Q 2 < 4 GeV 2. Using the ux of quasi-real photons with Q 2 < 4 GeV 2 , a total photoproduction cross section of (p ! J==X) = (56 13 14) nb is derived at an average W p = 90 GeV. The distribution of the squared momentum transfer t from the proton to the J== can be tted using an exponential exp (?bjtj) below a jtj of 0:75 GeV 2 yielding a slope parameter of b = (4:7 1:9) GeV ?2 .

查看译文

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要