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Title: Evidence for Nucleon-Resonance Excitation in {omega}-Meson Photoproduction

Abstract

The photoproduction of the {omega} meson has been studied at GRAAL from threshold up to a photon energy of 1.5 GeV. The differential cross sections and beam asymmetries have been measured precisely at all angles. The total cross section is also obtained. Systematic enhancements of the differential cross section at large angles and nonzero beam asymmetries at intermediate angles provide clear evidence for s- and u-channel resonant processes. The data are compared to the results of hadron and quark models.

Authors:
; ; ; ; ; ; ;  [1]; ; ; ;  [2];  [3];  [1];  [4]
  1. IN2P3, Institut de Physique Nucleaire, 91406 Orsay (France)
  2. Institute for Nuclear Research, 60th October Anniversary Prospect 7a, 117 312 Moscow (Russian Federation)
  3. I. Kurchatov Institute of Atomic Energy, Kurchatov Square Bldg. 1, 123182, Moscow (Russian Federation)
  4. (United Kingdom)
Publication Date:
OSTI Identifier:
20775151
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 13; Other Information: DOI: 10.1103/PhysRevLett.96.132003; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; DIFFERENTIAL CROSS SECTIONS; EXCITATION; GEV RANGE 01-10; NUCLEONS; OMEGA-782 MESONS; PHOTONS; PHOTOPRODUCTION; QUARK MODEL; S CHANNEL; TOTAL CROSS SECTIONS; U CHANNEL

Citation Formats

Ajaka, J., Assafiri, Y., Bouchigny, S., Didelez, J.P., Fichen, L., Guidal, M., Hourany, E., Kunne, R., Kouznetsov, V., Mushkarenkov, A.N., Nedorezov, V., Rudnev, N., Turinge, A., Zhao, Q., and Department of Physics, University of Surrey, Guildford GU2 7XH. Evidence for Nucleon-Resonance Excitation in {omega}-Meson Photoproduction. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.132003.
Ajaka, J., Assafiri, Y., Bouchigny, S., Didelez, J.P., Fichen, L., Guidal, M., Hourany, E., Kunne, R., Kouznetsov, V., Mushkarenkov, A.N., Nedorezov, V., Rudnev, N., Turinge, A., Zhao, Q., & Department of Physics, University of Surrey, Guildford GU2 7XH. Evidence for Nucleon-Resonance Excitation in {omega}-Meson Photoproduction. United States. doi:10.1103/PhysRevLett.96.132003.
Ajaka, J., Assafiri, Y., Bouchigny, S., Didelez, J.P., Fichen, L., Guidal, M., Hourany, E., Kunne, R., Kouznetsov, V., Mushkarenkov, A.N., Nedorezov, V., Rudnev, N., Turinge, A., Zhao, Q., and Department of Physics, University of Surrey, Guildford GU2 7XH. Fri . "Evidence for Nucleon-Resonance Excitation in {omega}-Meson Photoproduction". United States. doi:10.1103/PhysRevLett.96.132003.
@article{osti_20775151,
title = {Evidence for Nucleon-Resonance Excitation in {omega}-Meson Photoproduction},
author = {Ajaka, J. and Assafiri, Y. and Bouchigny, S. and Didelez, J.P. and Fichen, L. and Guidal, M. and Hourany, E. and Kunne, R. and Kouznetsov, V. and Mushkarenkov, A.N. and Nedorezov, V. and Rudnev, N. and Turinge, A. and Zhao, Q. and Department of Physics, University of Surrey, Guildford GU2 7XH},
abstractNote = {The photoproduction of the {omega} meson has been studied at GRAAL from threshold up to a photon energy of 1.5 GeV. The differential cross sections and beam asymmetries have been measured precisely at all angles. The total cross section is also obtained. Systematic enhancements of the differential cross section at large angles and nonzero beam asymmetries at intermediate angles provide clear evidence for s- and u-channel resonant processes. The data are compared to the results of hadron and quark models.},
doi = {10.1103/PhysRevLett.96.132003},
journal = {Physical Review Letters},
number = 13,
volume = 96,
place = {United States},
year = {Fri Apr 07 00:00:00 EDT 2006},
month = {Fri Apr 07 00:00:00 EDT 2006}
}