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

摘要：

We present a preliminary analysis of the photon beam asymmetry observable (Σ) from the pho-toproduction 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.

关键词： beam asymmetry photonuclear photoproduction neutron pion.

作者: D.Sokhan D.Watts F.Klein

作者单位: School of Physics & Astronomy,University of Edinburgh,Edinburgh EH9 3JZ,UK Department of Physics,Catholic University of America,Washington DC 20064,USA

会议类型: 国际会议

会议名称: The 12th International Workshop on the Physics Ezcited Nucleon(2009核子共振态物理国际研讨会)

会议地点: 北京

会议语种:英文

页码: 1369-1372

在线出版日期: 2009-04-19（万方平台首次上网日期，不代表论文的发表时间）