A new beam asymmetry measurement from pion photoproduction on the neutron using CLAS

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for the and CLAS collaboration. A new beam asymmetry measurement from pion photoproduction on the neutron using CLAS[J]. Chinese Physics C, 2009, 33(12): 1369-1372. doi: 10.1088/1674-1137/33/12/057
for the and CLAS collaboration. A new beam asymmetry measurement from pion photoproduction on the neutron using CLAS[J]. Chinese Physics C, 2009, 33(12): 1369-1372.  doi: 10.1088/1674-1137/33/12/057 shu
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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

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A new beam asymmetry measurement from pion photoproduction on the neutron using CLAS

Abstract: 

We present a preliminary analysis of the photon beam asymmetry observable
(Σ) from the photoproduction reaction channel γn→pπ in the invariant mass range 1.6—2.3 GeV. The measurement was obtained using the near-4π CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Laboratory, USA, employing a linearly polarised photon beam with an energy range 1.1—2.3 GeV, incident on a liquid deuterium target. The measurement will provide new data to address the poorly established neutron excitation spectrum and will greatly expand the sparse world data-set both in energy and angle.

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