Positrons at JLab advancing nuclear science in Hall B

V. Burkert
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Abstract

In this talk I address two high impact physics programs that require the use of polarized and unpolarized positron beams in addition to using electron beams of the same energy. First, I address what will be gained from using positron beams in addition to electron beams in the extraction of the Compton Form Factors (CFFs) and generalized parton distributions (GPDs) from Deeply Virtual Compton Scattering (DVCS) on a proton target. As a second high impact science program I discuss an experimental scenario using unpolarized positrons to measure elastic scattering on protons in an effort to determine definitively the 2-photon exchange contributions in order to resolve a longstanding discrepancy in the determination of the proton’s electric and magnetic form factors.
JLab的正电子推动核科学的发展
在这次演讲中,我将介绍两个高影响物理项目,除了使用相同能量的电子束外,还需要使用极化和非极化的正电子束。首先,我将讨论在质子目标上从深度虚拟康普顿散射(DVCS)中提取康普顿形状因子(cff)和广义部子分布(GPDs)时,除了电子束外,使用正电子束将获得什么。作为第二个高影响力的科学项目,我讨论了一个实验方案,使用非极化正电子来测量质子上的弹性散射,以明确地确定双光子交换的贡献,以解决长期以来在确定质子的电和磁形状因素方面的差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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