$Q^2 = $2.5, 5.2, 6.8 和 8.5 GeV$^2$ 下弹性电子-质子散射中的极化转移观测量
摘要
GEp-III 和 GEp-2 实验于 2007 至 2008 年在 Jefferson Lab (JLab) 的 Hall C 进行，旨在将 的知识扩展到实际可达到的最高 ，并寻找弹性 散射极化转移观测量中超出 Born 近似之外的效应。本文报道了对共同实验装置和数据分析流程的扩展描述，以及对两项实验数据的最终重新分析结果，包括先前未发表的 GEp-2 实验全接收度数据结果。Hall C 高动量谱仪检测并测量了 JLab 极化电子束与液氢靶碰撞后弹性反冲质子的极化。一个大接收度电磁量能器探测符合的弹性散射电子，以抑制非弹性背景。最终的 GEp-III 数据与最初发表的结果相比基本未变。最终 GEp-2 数据在 和 处的统计不确定性相对于原发表结果显著降低。 随 的下降延续至 GeV，但相对于早期 Hall A 测量中观察到的近似线性下降，其下降速率有所减缓。在 GeV 时，质子形状因子比 没有表现出统计上显著的 依赖性，这与 Born 近似中的预期一致。纵向极化转移分量与其 Born 值之比 在 相对于 显示出约 1.4% 的增强，基于总不确定性具有 的显著性，这意味着横向分量 中存在在比值 中抵消的类似效应。
引用
@article{arxiv.1707.08587,
title = {Polarization Transfer Observables in Elastic Electron Proton Scattering at $Q^2 = $2.5, 5.2, 6.8, and 8.5 GeV$^2$},
author = {A. J. R. Puckett and E. J. Brash and M. K. Jones and W. Luo and M. Meziane and L. Pentchev and C. F. Perdrisat and V. Punjabi and F. R. Wesselmann and A. Afanasev and A. Ahmidouch and I. Albayrak and K. A. Aniol and J. Arrington and A. Asaturyan and H. Baghdasaryan and F. Benmokhtar and W. Bertozzi and L. Bimbot and P. Bosted and W. Boeglin and C. Butuceanu and P. Carter and S. Chernenko and E. Christy and M. Commisso and J. C. Cornejo and S. Covrig and S. Danagoulian and A. Daniel and A. Davidenko and D. Day and S. Dhamija and D. Dutta and R. Ent and S. Frullani and H. Fenker and E. Frlez and F. Garibaldi and D. Gaskell and S. Gilad and R. Gilman and Y. Goncharenko and K. Hafidi and D. Hamilton and D. W. Higinbotham and W. Hinton and T. Horn and B. Hu and J. Huang and G. M. Huber and E. Jensen and C. Keppel and M. Khandaker and P. King and D. Kirillov and M. Kohl and V. Kravtsov and G. Kumbartzki and Y. Li and V. Mamyan and D. J. Margaziotis and A. Marsh and Y. Matulenko and J. Maxwell and G. Mbianda and D. Meekins and Y. Melnik and J. Miller and A. Mkrtchyan and H. Mkrtchyan and B. Moffit and O. Moreno and J. Mulholland and A. Narayan and S. Nedev and Nuruzzaman and E. Piasetzky and W. Pierce and N. M. Piskunov and Y. Prok and R. D. Ransome and D. S. Razin and P. Reimer and J. Reinhold and O. Rondon and M. Shabestari and A. Shahinyan and K. Shestermanov and S. Sirca and I. Sitnik and L. Smykov and G. Smith and L. Solovyev and P. Solvignon and R. Subedi and E. Tomasi-Gustafsson and A. Vasiliev and M. Veilleux and B. B. Wojtsekhowski and S. Wood and Z. Ye and Y. Zanevsky and X. Zhang and Y. Zhang and X. Zheng and L. Zhu},
journal= {arXiv preprint arXiv:1707.08587},
year = {2018}
}
备注
44 pages, 28 figures. Archival publication for the GEp-III and GEp-2gamma experiments that ran in Jefferson Lab's experimental Hall C from October, 2007 to June, 2008. v2: final manuscript as accepted by PRC. v3: Replaced figures 13 and 19 with corrected versions from published Erratum. Also made minor corrections to the text and to Table XI reflecting the corrections in the published Erratum