Beam asymmetries in near-threshold {omega} photoproduction off the proton

Journal Article · Mon Dec 01 00:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.117101· OSTI ID:21251067

Klein, Frank; Bantes, B; Dutz, H; Elsner, D; Ewald, R; Hoeffgen, S; Kammer, S; Kleber, V; Klein, Friedrich; Konrad, M; Menze, D; Morales, C; Ostrick, M; Schmieden, H; Suele, A; Walther, D ^[1]; Anisovich, A V; Bayadilov, D; Nikonov, V A; Novinski, D ^[2]

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1. Physikalisches Institut, Universitaet Bonn (Germany)
2. Helmholtz-Institut fuer Strahlen- u. Kernphysik, Universitaet Bonn (Germany)

The photoproduction of {omega} mesons off protons has been studied at the Bonn ELSA accelerator from threshold to E{sub {gamma}}=1700 MeV. Linearly polarized beams were produced via coherent bremsstrahlung. Large photon asymmetries in excess of 50% were obtained. For the first time the pion asymmetries associated with the {omega}{yields}{pi}{sup 0}{gamma} decay were measured and found close to zero. The asymmetries indicate s-channel resonance formation on top of t-channel exchange processes.

• OSTI ID: 21251067
• Journal Information: Physical Review. D, Particles Fields, Vol. 78, Issue 11; Other Information: DOI: 10.1103/PhysRevD.78.117101; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ASYMMETRY
BREMSSTRAHLUNG
DECAY
GEV RANGE 01-10
MESONS
OMEGA PARTICLES
PHOTONS
PHOTOPRODUCTION
PIONS
POLARIZED BEAMS
PROTON BEAMS
PROTONS
RESONANCE
S CHANNEL
T CHANNEL