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Observation of a coherence length effect in exclusive ρ(0) electroproduction

Ackerstaff, K. and Airapetian, A. and Akopov, N. and Akushevich, I. and Amarian, M. and Aschenauer, E. C. and Avakian, H. and Avakian, R. and Avetissian, A. and Bains, B. and Barrow, S. and Baumgarten, C. and Beckmann, M. and Belostotski, St. and Belz, J. E. and Benisch, Th. and Bernreuther, S. and Bianchi, N. and Blanchard, S. and Blouw, J. and Böttcher, H. and Borissov, A. and Brack, J. and Brauksiepe, S. and Braun, B. and Bray, B. and Brons, St. and Brückner, W. and Brüll, A. and Bruins, E. E. W. and Bulten, H. J. and Cadman, R. V. and Capitani, G. P. and Carter, P. and Chumney, P. and Cisbani, E. and Court, G. R. and Dalpiaz, P. F. and Delheij, P. P. J. and De Sanctis, E. and De Schepper, D. and Devitsin, E. and de Witt Huberts, P. K. A. and Di Nezza, P. and Düren, M. and Dvoredsky, A. and Elbakian, G. and Ely, J. and Emerson, J. and Fantoni, A. and Fechtchenko, A. and Ferstl, M. and Fick, D. and Fiedler, K. and Filippone, B. W. and Fischer, H. and Fortune, H. T. and Fox, B. and Frabetti, S. and Franz, J. and Frullani, S. and Funk, M.-A. and Gagunashvili, N. D. and Galumian, P. and Gao, H. and Gärber, Y. and Garibaldi, F. and Gavrilov, G. and Geiger, P. and Gharibyan, V. and Giordjian, V. and Golendukhin, A. and Graw, G. and Grebeniouk, O. and Green, P. W. and Greeniaus, L. G. and Grosshauser, C. and Guidal, M. G. and Gute, A. and Gyurjyan, V. and Haas, J. P. and Haeberli, W. and Hansen, J.-O. and Hasch, D. and Häusser, O. and Heinsius, F. H. and Henderson, R. S. and Henkes, Th. and Henoch, M. and Hertenberger, R. and Holler, Y. and Holt, R. J. and Hoprich, W. and Ihssen, H. and Iodice, M. and Izotov, A. and Jackson, H. E. and Jgoun, A. and Jones, C. and Kaiser, R. and Kinney, E. and Kirsch, M. and Kisselev, A. and Kitching, P. and Kobayashi, H. and Koch, N. and Königsmann, K. and Kolstein, M. and Kolster, H. and Korotkov, V. and Korsch, W. and Kozlov, V. and Kramer, L. H. and Krause, B. and Krivokhijine, V. G. and Kückes, M. and Kümmell, F. and Kyle, G. and Lachnit, W. and Lorenzon, W. and Lung, A. and Makins, N. C. R. and Martens, F. K. and Martin, J. W. and Masoli, F. and Mateos, A. and McAndrew, M. and McIlhany, K. and McKeown, R. D. and Meissner, F. and Menden, F. and Mercer, D. and Metz, A. and Meyners, N. and Mikloukho, O. and Miller, C. A. and Miller, M. A. and Milner, R. G. and Mitsyn, V. and Most, A. and Mozzetti, R. and Muccifora, V. and Nagaitsev, A. and Naryshkin, Y. and Nathan, A. M. and Neunreither, F. and Niczyporuk, M. and Nowak, W.-D. and Nupieri, M. and Oelwein, P. and Ogami, H. and O'Neill, T. G. and Openshaw, R. and Ouyang, J. and Owen, B. R. and Papavassiliou, V. and Pate, S. F. and Pitt, M. and Poolman, H. R. and Potashov, S. and Potterveld, D. H. and Povh, B. and Rakness, G. and Reali, A. and Redwine, R. and Reolon, A. R. and Ristinen, R. and Rith, K. and Roloff, H. and Röper, G. and Rossi, P. and Rudnitsky, S. and Ruh, M. and Ryckbosch, D. and Sakemi, Y. and Savin, I. and Scarlett, C. and Schmidt, F. and Schmitt, H. and Schnell, G. and Schüler, K. P. and Schwind, A. and Seibert, J. and Shibata, T.-A. and Shin, T. and Shutov, V. and Simani, C. and Simon, A. and Sinram, K. and Slavich, P. and Sowinski, J. and Spengos, M. and Steffens, E. and Stenger, J. and Stewart, J. and Stock, F. and Stoesslein, U. and Sutter, M. and Tallini, H. and Taroian, S. and Terkulov, A. and Thiessen, D. M. and Thomas, E. and Tipton, B. and Trudel, A. and Tytgat, M. and Urciuoli, G. M. and van Hunen, J. J. and van de Vyver, R. and van den Brand, J. F. J. and van der Steenhoven, G. and Vetterli, M. C. and Vikhrov, V. and Vincter, M. and Visser, J. and Volk, E. and Wander, W. and Welch, T. P. and Williamson, S. E. and Wise, T. and Wölfel, T. and Woller, K. and Yoneyama, S. and Zapfe-Düren, K. and Zohrabian, H. and Zurmühle, R. (1999) Observation of a coherence length effect in exclusive ρ(0) electroproduction. Physical Review Letters, 82 (15). pp. 3025-3029. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:ACKprl99b

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Abstract

Exclusive incoherent electroproduction of the ρ0(770) meson from 1H, 2H, 3He, and 14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q^2>0.4 GeV^2 and positron energy loss ν from 9 to 20 GeV. The ratio of the 14N to 1H cross sections per nucleon, known as the nuclear transparency, was found to decrease with increasing coherence length of quark-antiquark fluctuations of the virtual photon. The data provide clear evidence of the interaction of the quark-antiquark fluctuations with the nuclear medium.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.82.3025DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevLett.82.3025PublisherUNSPECIFIED
Additional Information:© 1999 American Physical Society. Received 5 November 1998. We gratefully acknowledge the DESY management for its support and the DESY staff and the staffs of the collaborating institutions. We also thank B. Z. Kopeliovich, J. Nemchik, M. Strikman, and especially D. F. Geesaman for helpful discussions. This work was supported by the FWO-Flanders, Belgium; the Natural Sciences and Engineering Research Council of Canada; the INTAS and TMR network contributions from the European Community; the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie; the Deutscher Akademischer Austauschdienst (DAAD); the Italian Istituto Nazionale di Fisica Nucleare (INFN); Monbusho, JSPS, and Toray Science Foundation of Japan; the Dutch Foundation for Fundamental Onderzoek der Materie (FOM); the U.K. Particle Physics and Astronomy Research Council; and the U.S. Department of Energy and National Science Foundation.
Funders:
Funding AgencyGrant Number
Fonds Wetenschappelijk Onderzoek (FWO) (Belgium)UNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
European CommunityUNSPECIFIED
Bundesministerium für Bildung Wissenschaft, Forschung und TechnologieUNSPECIFIED
Deutscher Akademischer Austauschdienst (DAAD)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN) (Italy)UNSPECIFIED
MonbukagakushoUNSPECIFIED
Japanese Society for the Promotion of ScienceUNSPECIFIED
Toray Science FoundationUNSPECIFIED
Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
Particle Physics and Astronomy Research Council (PPARC) (UK)UNSPECIFIED
Department of EnergyUNSPECIFIED
National Science FoundationUNSPECIFIED
Subject Keywords:VECTOR-MESONS; COLOR TRANSPARENCY; NUCLEAR TRANSPARENCY; SCATTERING; PHOTOPRODUCTION; Q(2); QCD
Record Number:CaltechAUTHORS:ACKprl99b
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:ACKprl99b
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13154
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:29 Jan 2009 22:56
Last Modified:26 Dec 2012 10:45

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