Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

H. Schmieden (for the CBELSA/TAPS collaboration)

doi:10.1088/1674-1137/33/12/016

Chinese Physics C> 2009, Vol. 33> Issue(12) : 1146-1152 DOI: 10.1088/1674-1137/33/12/016

Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

H. Schmieden (for the CBELSA/TAPS collaboration)

(Rheinische Friedrich-Wilhelms-Universität, Physikalisches Institut, D-53115 Bonn, Germany)

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Abstract：
Measurements of ω photoproduction of the Crystal-Barrel/TAPS experiment at the ELSA accelerator of Bonn University are presented which used linearly polarized tagged photon beam from threshold to E_γ=1700 MeV. The azimuthal asymmetries Σ and Σ_π indicate s-channel resonance contributions on top of the established t-channel exchange processes. These findings are further enhanced by a very first measurement of the G-asymmetry which, in addition to the polarized photon beam, also requires a longitudinally polarized proton target. An intuitive interpretation of the specific sensitivity of the azimuthal asymmetries to the reaction mechanisms involved is given.

References

[1]

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H. Schmieden (for the CBELSA/TAPS collaboration). Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries[J]. Chinese Physics C, 2009, 33(12): 1146-1152. doi: 10.1088/1674-1137/33/12/016

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Received: 2009-08-07
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

(Rheinische Friedrich-Wilhelms-Universität, Physikalisches Institut, D-53115 Bonn, Germany)

Received Date: 2009-08-07

Accepted Date: 1900-01-01

Available Online: 2009-12-05

Abstract:

Measurements of ω photoproduction of the Crystal-Barrel/TAPS experiment at the ELSA accelerator of Bonn University are presented which used linearly polarized tagged photon beam from threshold to E_γ=1700 MeV. The azimuthal asymmetries Σ and Σ_π indicate s-channel resonance contributions on top of the established t-channel exchange processes. These findings are further enhanced by a very first measurement of the G-asymmetry which, in addition to the polarized photon beam, also requires a longitudinally polarized proton target. An intuitive interpretation of the specific sensitivity of the azimuthal asymmetries to the reaction mechanisms involved is given.

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Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

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Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

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