质子弹性形状因子的精确Rosenbluth测量
核实验
2008-11-26 v1
摘要
我们报告了在Q^2值为2.64、3.20和4.10 GeV^2时质子形状因子的新Rosenbluth测量结果。与以往探测散射电子的测量不同，本实验通过探测反冲质子来确定截面。在每个Q^2下，相对截面的确定精度优于1%。测量重点在于提取G_E/G_M，其精度达到4-8%，并发现其近似满足形状因子标度律，即\mu_p G_E \approx G_M。这些结果与之前的Rosenbluth提取结果一致且精确得多。然而，它们与近期精度相当的极化转移测量结果不一致，表明两种技术之间存在系统性差异。
引用
@article{arxiv.nucl-ex/0410010,
title = {Precision Rosenbluth measurement of the proton elastic form factors},
author = {I. A. Qattan and J. Arrington and R. E. Segel and X. Zheng and K. Aniol and O. K. Baker and R. Beams and E. J. Brash and J. Calarco and A. Camsonne and J. -P. Chen and M. E. Christy and D. Dutta and R. Ent and S. Frullani and D. Gaskell and O. Gayou and R. Gilman and C. Glashausser and K. Hafidi and J. -O. Hansen and D. W. Higinbotham and W. Hinton and R. J. Holt and G. M. Huber and H. Ibrahim and L. Jisonna and M. K. Jones and C. E. Keppel and E. Kinney and G. J. Kumbartzki and A. Lung and D. J. Margaziotis and K. McCormick and D. Meekins and R. Michaels and P. Monaghan and P. Moussiegt and L. Pentchev and C. Perdrisat and V. Punjabi and R. Ransome and J. Reinhold and B. Reitz and A. Saha and A. Sarty and E. C. Schulte and K. Slifer and P. Solvignon and V. Sulkosky and K. Wijesooriya and B. Zeidman},
journal= {arXiv preprint arXiv:nucl-ex/0410010},
year = {2008}
}
备注
5 pages, 3 figures, submitted to PRL