质子形状因子比值数据在 $\mathbf{Q^2 = 4.0}$、4.8 和 5.6 GeV$\mathbf{^2}$ 处的最终分析
核实验
2012-04-17 v4 高能物理 - 实验
摘要
在杰斐逊实验室利用极化转移方法对质子电磁形状因子比值 的精确测量，揭示了 在 GeV 时随动量转移 的急剧下降，这与先前从截面测量中提取的 存在强烈分歧，从而彻底改变了对核子结构的理解。特别是，极化转移结果暴露了单光子交换近似的适用极限，并凸显了夸克轨道角动量在核子结构中的作用。杰斐逊实验室A厅的GEp-II实验在 3.5 GeV GeV 范围内的四个 值处测量了 。最初发表的GEp-II结果与后来在更高 处的测量之间可能存在的差异，促使了对GEp-II数据的重新分析。本文给出了GEp-II实验的最终结果，包括新分析的细节、对实验装置的扩展描述以及自最初发表以来的理论进展概述。最终分析的关键结果是 的结果系统性增大，改善了高 区域极化转移数据的一致性。这一增大是改进弹性事件选择的结果，该选择在很大程度上消除了原分析所低估的非弹性污染的系统性效应。
引用
@article{arxiv.1102.5737,
title = {Final Analysis of Proton Form Factor Ratio Data at $\mathbf{Q^2 = 4.0}$, 4.8 and 5.6 GeV$\mathbf{^2}$},
author = {A. J. R. Puckett and E. J. Brash and O. Gayou and M. K. Jones and L. Pentchev and C. F. Perdrisat and V. Punjabi and K. A. Aniol and T. Averett and F. Benmokhtar and W. Bertozzi and L. Bimbot and J. R. Calarco and C. Cavata and Z. Chai and C. -C. Chang and T. Chang and J. P. Chen and E. Chudakov and R. De Leo and S. Dieterich and R. Endres and M. B. Epstein and S. Escoffier and K. G. Fissum. H. Fonvieille and S. Frullani and J. Gao and F. Garibaldi and S. Gilad and R. Gilman and A. Glamazdin and C. Glashausser and J. Gomez and J. -O. Hansen and D. Higinbotham and G. M. Huber and M. Iodice and C. W. de Jager and X. Jiang and M. Khandaker and S. Kozlov and K. M. Kramer and G. Kumbartzki and J. J. LeRose and D. Lhuillier and R. A. Lindgren and N. Liyanage and G. J. Lolos and D. J. Margaziotis and F. Marie and P. Markowitz and K. McCormick and R. Michaels and B. D. Milbrath and S. K. Nanda and D. Neyret and N. M. Piskunov and R. D. Ransome and B. A. Raue and R. Roché and M. Rvachev and A. Saha and C. Salgado and S. Sirca and I. Sitnik and S. Strauch and L. Todor and E. Tomasi-Gustafsson and G. M. Urciuoli and H. Voskanyan and K. Wijesooriya and B. B. Wojtsekhowski and X. Zheng and L. Zhu},
journal= {arXiv preprint arXiv:1102.5737},
year = {2012}
}
备注
30 pages, 17 figures, 4 tables. Final version to appear in Phys. Rev. C