First measurement of the deep-inelastic structure of proton diffraction

T. Ahmed, S. Aid, V. Andreev, B. Andrieu, R. D. Appuhn, M. Arpagaus, A. Babaev, J. Baehr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, H. P. Beck, H. J. Behrend, A. Belousov, Ch Berger, G. BernardiR. Bernet, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, 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, L. Büngener, J. Bürger, F. W. Büsser, A. Buniatian, S. Burke, M. Burton, G. Buschhorn, A. J. Campbell, T. Carli, F. Charles, D. Clarke, A. B. Clegg, B. Clerbaux, M. Colombo, J. G. Contreras, C. Cormack, J. A. Coughlan, A. Courau, Ch Coutures, G. Cozzika, L. Criegee, D. G. Cussans, J. Cvach, S. Dagoret, J. B. Dainton, W. D. Dau, K. Daum, M. David, E. Deffur, B. Delcourt, L. Del Buono, A. De Roeck, E. A. De Wolf, P. Di Nezza, C. Dollfus, J. D. Dowell, H. B. Dreis, A. Droutskoi, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T. R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, H. Ehrlichmann, S. Eichenberger, R. Eichler, 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. Flügge, A. Fomenko, M. Forbush, J. Formánek, 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, I. Gorelov, P. Goritchev, C. Grab, H. Grässler, R. Grässler, 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, I. Herynek, M. F. Hess, W. Hildesheim, P. Hill, K. H. Hiller, C. D. Hilton, J. Hladký, K. C. Hoeger, M. Höppner, R. Horisberger, V. L. Hudgson, Ph Huet, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, M. A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, D. P. Johnson, L. Johnson, H. Jung, P. I.P. Kalmus, D. Kant, R. Kaschowitz, P. Kasselmann, U. Kathage, J. Katzy, H. H. Kaufmann, S. Kazarian, I. R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Köhler, J. H. Köhne, H. Kolanoski, F. Kole, S. D. Kolva, V. Korbel, M. Korn, P. Kostka, S. K. Kotelnikov, T. Krämerkämper, M. W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, J. P. Kubenka, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, 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, G. Lindström, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, H. Lohmander, J. Lomas, G. C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, R. Martin, H. U. Martyn, J. Martyniak, S. Masson, T. Mavroidis, S. J. Maxfield, S. J. McMahon, A. Mehta, K. Meier, D. Mercer, T. Merz, C. A. Meyer, H. Meyer, J. Meyer, S. Mikocki, D. Milstead, F. Moreau, J. V. Morris, E. Mroczko, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th Naumann, P. R. Newman, D. Newton, D. Neyret, H. K. Nguyen, T. C. Nicholls, F. Niebergall, C. Niebuhr, Ch Niedzballa, R. Nisius, G. Nowak, G. W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J. E. Olsson, D. Ozerov, 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, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, P. Ribarics, H. Rick, V. Riech, J. Riedlberger, S. Riess, M. Rietz, E. Rizvi, S. M. Robertson, P. Robmann, H. E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, R. Rylko, N. Sahlmann, E. Sanchez, D. P.C. Sankey, P. Schacht, S. Schiek, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, A. Schwind, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L. N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I. O. Skillicorn, P. Smirnov, J. R. Smith, V. Solochenko, Y. Soloviev, J. Spiekermann, H. Spitzer, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, K. Stolze, J. Strachota, U. Straumann, W. Struczinski, J. P. Sutton, S. Tapprogge, R. E. Taylor, V. Tchernyshov, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Esch, P. Van Mechelen, A. Vartapetian, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, I. W. Walker, A. Walther, G. Weber, M. Weber, D. Wegener, A. Wegner, H. P. Wellisch, L. R. West, S. Willard, M. Winde, G. G. Winter, C. Wittek, A. E. Wright, E. Wünsch, N. Wulff, T. P. Yiou, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, W. Zimmermann, F. Zomer, K. Zuber

Research output: Contribution to journalArticlepeer-review

230 Scopus citations

Abstract

A measurement is presented, using data taken with the H1 detector at HERA, of the contribution of diffractive interactions to deep-inelastic electron-proton (ep) scattering in the kinematic range 8.5 < Q2 < 50GeV2, 2.4 × 10-4 < Bjorken-x < 0.0133, and 3.7 × 10-4 < χp < 0.043. The diffractive contribution to the proton structure function F2(x,Q2) is evaluated as a function of the appropriate deep-inelastic scattering variables χp, Q2, β (= χ χp) using a class of deep-inelastic ep scattering events with no hadronic energy flow in an interval of pseudo-rapidity adjacent to the proton beam direction. the dependence of this contribution on χp is measured to be χp -n with n = 1.19 ± 0.06 (stat.) ± 0.07 (syst.) independent of β and Q2, which is consistent with both a diffractive interpretation and a factorisable ep diffractive cross section. A first measurement of the deep-inelastic structure of the pomeron in the form of the Q2 and β dependences of a factorised structure function is presented. For all measured β, this structure function is observed to be consistent with scale invariance.

Original languageEnglish (US)
Pages (from-to)681-696
Number of pages16
JournalPhysics Letters B
Volume348
Issue number3-4
DOIs
StatePublished - Apr 6 1995
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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