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Diffractive production of ρ0(770) mesons in muon-proton interactions at 470 GeV

  • M. R. Adams
  • , M. Aderholz
  • , S. Aïd
  • , P. L. Anthony
  • , D. A. Averill
  • , M. D. Baker
  • , B. R. Baller
  • , A. Banerjee
  • , A. A. Bhatti
  • , U. Bratzler
  • , H. M. Braun
  • , T. J. Carroll
  • , H. L. Clark
  • , J. M. Conrad
  • , R. Davisson
  • , I. Derado
  • , F. S. Dietrich
  • , W. Dougherty
  • , T. Dreyer
  • , V. Eckardt
  • U. Ecker, M. Erdmann, G. Y. Fang, J. Figiel, R. W. Finlay, H. J. Gebauer, D. F. Geesaman, K. A. Griffioen, R. S. Guo, J. Haas, C. Halliwell, D. Hantke, K. H. Hicks, H. E. Jackson, D. E. Jaffe, G. Jancso, D. M. Jansen, Z. Jin, K. Kadija, S. Kaufmann, R. D. Kennedy, E. R. Kinney, H. G.E. Kobrak, A. V. Kotwal, S. Kunori, J. J. Lord, H. J. Lubatti, D. McLeod, P. Madden, S. Magill, A. Manz, H. Melanson, D. G. Michael, H. E. Montgomery, J. G. Morfin, R. B. Nickerson, J. Novak, K. Olkiewicz, L. Osborne, R. Otten, V. Papavassiliou, B. Pawlik, F. M. Pipkin, D. H. Potterveld, A. Röser, J. J. Ryan, C. W. Salgado, H. Schellman, M. Schmitt, N. Schmitz, K. P. Schüler, G. Siegert, A. Skuja, G. A. Snow, S. Söldner-Rembold, P. Spentzouris, P. Stopa, R. A. Swanson, H. Venkataramania, M. Wilhelm, Richard Wilson, W. Wittek, S. A. Wolbers, G. P. Zeller, A. Zghiche, T. Zhao
  • University of Illinois at Chicago
  • Max-Planck-Institut für Physik
  • University of Maryland, College Park
  • Universität Hamburg
  • Lawrence Livermore National Laboratory
  • Stanford Linear Accelerator Center
  • Massachusetts Institute of Technology
  • Fermi National Accelerator Laboratory
  • University of Pennsylvania
  • Fidelity Investments
  • University of Washington
  • The Rockefeller University
  • Bergische Universität Gesamthochschule Wuppertal
  • University of Wisconsin Hospital
  • Ohio University
  • Texas A&M University
  • Harvard University
  • Columbia University
  • University of Freiburg
  • University of Heidelberg
  • University of Wisconsin-Madison
  • Institute for Nuclear Physics
  • Argonne National Laboratory
  • College of William and Mary
  • National Kaohsiung Normal University
  • German Research Center for Environmental Health
  • Florida State University
  • KFKI Research Institute for Particle and Nuclear Physics (RMKI)
  • MST-8, Los Alamos National Laboratory
  • University of California, San Diego
  • University of Colorado Boulder
  • Linear Technology Inc.
  • California Institute of Technology
  • University of Oxford
  • Northwestern University
  • Yale University
  • New Mexico State University
  • Klinikum Barmen
  • c/o DESY
  • Thomas Jefferson National Accelerator Facility
  • European Organization for Nuclear Research
  • F. Hoffmann-La-Roche

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

90 Citations (Scopus)

Résumé

The diffractive production of ρ0(770) mesons in muon-proton interactions is studied in the kinematic region 0.15 GeV2 < Q2 < 20 GeV2 and 20 GeV < v < 420 GeV. The data were obtained in the Fermilab fixed-target experiment E665 with primary muons of 470 GeV energy. Results are presented on the Q2, x and v dependence of the cross section, on the shape of the π+π- mass spectrum, on the slope of the diffraction peak and on the production and decay angular distributions of the ρ0(770). The cross section for diffractive production of ρ0 by virtual photons on protons depends mainly on Q2. At fixed Q2, no significant dependence on x or v is observed. The extrapolation to Q2 = 0 yields a photoproduction cross section of (10.30 ± 0.33) μb. The slope of the t′ distribution has a value of (7.0 ± 0.2) GeV-2, with a tendency to decrease as Q2 increases. The production and decay angular distributions of the ρ0 depend strongly on Q2 and are consistent with s-channel helicity conservation. The ratio R = σLT deduced from the decay angular distributions rises strongly with Q2, passing the value of 1 at Q2 ≈ 2 GeV2.

langue originaleAnglais
Pages (de - à)237-261
Nombre de pages25
journalZeitschrift fur Physik C-Particles and Fields
Volume74
Numéro de publication2
Les DOIs
étatPublié - 1 janv. 1997
Modification externeOui

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