Exclusive π+ electroproduction off the proton from low to high −t
Exclusive π+ electroproduction off the proton from low to high −t
复制标题
独家 Ï 质子电生产从低到高 Ït
DOI：
10.1103/physrevc.100.065204
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发表时间：
2019
影响因子：
3.1
通讯作者：
Boeglin, W.
中科院分区：
文献类型：
--
作者：
Basnet, S.;Huber, G. M.;Li, W. B.;Blok, H. P.;Gaskell, D.;Horn, T.;Aniol, K.;Arrington, J.;Beise, E. J.;Boeglin, W.
背景：排他介子产生的测量是研究强子结构的一个有用工具。特别是，通过这些研究，我们可以分辨出不同距离尺度下的相关自由度。目的：研究当四动量转移到被撞击质子的平方增加时，非微扰和微扰量子色动力学之间的转变。方法：在4.709 GeV、2.4 GeV、2.127 GeV和2.127 GeV的固定束流能量下，结果：电产生截面的相关性与实验室B、C霍尔斯的实验数据基本一致。的数据是一致的Regge振幅为基础的理论模型，但表现出较差的协议与广义部分子分布为基础的model.Conclusion：协议的横截面与先前的数据意味着小贡献的干扰项，和确认的变化inslopes之间的低和高的区域以前观察到的光生反应表明在我们的运动学制度的电生反应的变化性质。
Background:Measurements of exclusive meson production are a useful tool in the study of hadronic structure. In particular, one can discern the relevant degrees of freedom at different distance scales through these studies.Purpose: To study the transition between nonperturbative and perturbative quantum chromodynamics as the square of four-momentum transfer to the struck proton,, is increased.Method: Cross sections for thereaction were measured over therange of 0.272 to 2.127with limited azimuthal coverage at fixed beam energy of 4.709 GeV,of 2.4, andof 2.0 GeV at the Thomas Jefferson National Accelerator Facility (JLab) Hall C.Results: Thedependence of the measuredelectroproduction cross section generally agrees with prior data from JLab Halls B and C. The data are consistent with a Regge amplitude-based theoretical model but show poor agreement with a generalized parton distribution–based model.Conclusion: The agreement of cross sections with prior data implies small contribution from the interference terms, and the confirmation of the change inslopes between the low- and high-regions previously observed in photoproduction indicates the changing nature of the electroproduction reaction in our kinematic regime.