Observation of Events at Very High Q 2 in epCollisions at HERAH 1 CollaborationAbstractMeasurements

C. Adlo,Michael Anderson,Valeri P. Andreev,Bastien Andrieu, V V Arkadov,C. Arndt,I. Ayyaz,Anton Babaev,Y. Ban,Pavel P. Baranov,Etienne Barrelet,R. Barschke,Wayne L. Bartel,Ursula Bassler,H. P. Beck, Mattias Beck,H. -J. Behrend,Andrei Belousov,Ch. Berger,Gregorio Bernardi,G. Bertrand-Coremans,R. Beyer,Phillip Biddulph,P. Bispham,Jean C. Bizot,Kerstin Borras,F. Botterweck,Vincent Boudry, Serguei Bourov,A. Braemer,Wolfgang Braunschweig,Violette Brisson,Ph. Bruel,Dusan Bruncko,C. Brune, Reiner Buchholz, A. Yu. Buniatian,Stephen Burke,Gerd W. Buschhorn,David Calvet,A. J. Campbell,Tancredi Carli,M. Charlet,D. P. Clarke,Barbara Clerbaux, S. W. Cocks,Jesús Contreras, Carrie L Cormack,J. A. Coughlan,A. Courau,M. -C. Cousinou,B. D. Cox,G. Cozzika,L. Criegee,David Cussans,Jaroslav Cvach, Sylvie Dagoret,J. B. Dainton,W. D. Dau,Karin Daum,M. David,C. L. Davis,Albert De Roeck,Eddi A. De Wolf,Bruno Delcourt, Michael Dirkmann,P. Dixon,W. Dlugosz,C. Dollfus,K. T. Donovan,John D Dowell,H. B. Dreis,A. Droutskoi,Jens Ebert, Tatjana Ebert,Guenter Eckerlin,V. Efremenko,Stephan Egli,Robert Eichler, Fred Louis Eisele,Eric Eisenhandler,Eckhard Elsen,Martin Erdmann,A. B. Fahr,Laurent Favart,Alexander Fedotov,R. Felst,Joël Feltesse,Jozef Ferencei,F. Ferrarotto,Kenneth Flamm,Monika Fleischer, Michael Dr Flieser,Andrii Fomenko,J. M. Foster,Gert Franke,Eckhart Fretwurst,Erwin Gabathuler,Kurt Gabathuler,Frank Gaede,J. Garvey,J. L. Gayler,Matthias Gebauer, Herbert Genzel,Roland Gerhards,Alexandre Glazov,Lars Goerlich,Nelly Gogitidze,M. Goldberg,D. Goldner, Krzysztof Golec-Biernat,B. González-Pineiro,I. V. Gorelov,Christoph Grab,Tim Greenshaw,G. Grindhammer,A. Gruber, Christoph Gruber,Thomas Hadig,Dieter Haidt,Lubos Hajduk, Th. Haller, M UniversityF. Hampel,W. John Haynes,Bernd Heinemann,G. Heinzelmann,R. C. W. Henderson,Hans Henschel,I. Herynek,M. F. Hess, Kirsten Hewitt,K. H. Hiller, Connor D. Hilton,J. Hladk,D. Ho mann, Theodore C. Holtom,Roland Horisberger,V. L. Hudgson,M. H utte,M. Ibbotson,Cigdem Issever,H. Itterbeck,A. Jacholkowska, Carl Magnus Gosta Jacobsson,Marianne Jacquet, Jürgen Janoth,D. M. Jansen, T. E. Jansen,L. J onsson,D. P. Johnson,Hannes Jung,P. I. P. Kalmus, Mark Kander,David Kant,R. Kaschowitz,U. Kathage,Jonathan Katzy,H. H. Kaufmann, Olivier Kaufmann, Martina Kausch,Sergei Kazarian,I. R. Kenyon,S. Kermiche, Claus Keuker,Ch. Kiesling,Michel H. Klein,Claus Kleinwort,G. Knies,Hermann Kolanoski,Scott Kolya,Václav Korbel,Pal Kostka,Sergey Kotelnikov,Mieczyslaw Witold Krasny,Helen Jane Krehbiel,Michael Kuhlen, Julia Ofer,Bertrand Laforge,Murrough Landon,Wolfgang Lange,Urs Langenegger,A. Lebedev,Flavio Lehner,Vincent Lemaitre,Sergey Levonian,M. Lindstroem,F. Linsel, Józef Lipiński,Beatrice List,Georges Lobo, Gabriela Carina López, V. N. Lubimov,L. K. Lytkin,Norbert Magnussen,E. I. Malinovski,Pierre Marage,Joerg Marks,Robin Marshall,J. Martens, Gonzalo Martin,Roland Martin,H. -U. Martyn,J. Martyniak,T. Mavroidis,S. J. Max eld,S. Mcmahon,Ankita Mehta,Karlheinz Meier,Petra Merkel,F. Metlica, Andrée Meyer,H. J. Meyer,J. Meyer, P. Otto Meyer,Albert Migliori,Stanislav Mikocki,D. A. Milstead,J. Möck,François Moreau,J. V. Morris,E. Mroczko,V. Nagovizin, Rolf Nahnhauer,Beate Naroska,Thomas Naumann,P. R. Newman,D. Newton,H. K. Nguyen,T. C. Nicholls,F. Niebergall

semanticscholar（1997）

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摘要

Measurements of ep scattering with squared 4{momentum transfer Q 2 up to 35000 GeV 2 are compared with the expectation of the standard deep-inelastic model of lepton{nucleon scattering (DIS). For Q 2 > 15000 GeV 2 , N obs = 12 neutral current candidate events are observed where the expectation is N DIS = 4:71 0:76 events. In the same Q 2 range, N obs = 4 charged current candidates are observed where the expectation is N DIS = 1:77 0:87 events. The probability P(N N obs) that the DIS model signal N uctuates to N N obs in a random set of experiments is 6 10 ?3 for neutral current and 0:14 for charged current. The diierence in the observed and expected number of Neutral Current events is mostly due to events at large masses M = p x s in which the positron is backscattered at large y = Q 2 =M 2 .

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