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Evidence for nucleon-resonance excitation in omega-meson photoproduction.

Ajaka, J., Assafiri, Y., Bouchigny, S., Didelez, J. P., Fichen, L., Guidal, M., Hourany, E., Kouznetsov, V., Kunne, R., Mushkarenkov, A. N. , Nedorezov, V., Rudnev, N., Turinge, A. and Zhao, Q. (2006) Evidence for nucleon-resonance excitation in omega-meson photoproduction. Physical Review Letters, 96 (132003).


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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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Ajaka, J.
Assafiri, Y.
Bouchigny, S.
Didelez, J. P.
Fichen, L.
Guidal, M.
Hourany, E.
Kouznetsov, V.
Kunne, R.
Mushkarenkov, A. N.
Nedorezov, V.
Rudnev, N.
Turinge, A.
Zhao, Q.
Date : 7 April 2006
DOI : 10.1103/PhysRevLett.96.132003
Additional Information : Published in Physical Review Letters, 96, 132003 (2006). © 2006 The American Physical Society.
Depositing User : Mr Adam Field
Date Deposited : 27 May 2010 14:05
Last Modified : 31 Oct 2017 13:56

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