阈值处 $p$($e,e^\prime p\,$)$\pi^0$ 反应的精密测量
核实验
2015-05-20 v3
摘要
本文报道了利用 反应在阈值附近进行 电产生的新测量结果。该实验旨在精确测定 波和 波电磁多极矩的能量依赖性，以此作为对手征微扰理论 (Chiral Perturbation Theory, ChPT) 预言的严格检验。数据是在 Jefferson Lab A 厅使用双谱仪装置，在 1192 MeV 的电子束能量下采集的。首次实现了在高于阈值 0.5 MeV 至 15 MeV 的不变能量范围内，对 质心系中 和 角度的完全覆盖。四动量转移 的覆盖范围从 0.05 到 0.155 (GeV/c)，步长精细。对我们数据的简单现象学分析表明，对于 (GeV/c)，ChPT 的 波预言与数据存在强烈分歧，而 波预言则符合得相当合理。
引用
@article{arxiv.1501.05607,
title = {A precision measurement of the $p$($e,e^\prime p\,$)$\pi^0$ reaction at threshold},
author = {K. Chirapatpimol and M. H. Shabestari and R. A. Lindgren and L. C. Smith and J. R. M. Annand and D. W. Higinbotham and B. Moffit and V. Nelyubin and B. E. Norum and K. Allada and K. Aniol and K. Ardashev and D. S. Armstrong and R. A. Arndt and F. Benmokhtar and A. M. Bernstein and W. Bertozzi and W. J. Briscoe and L. Bimbot and A. Camsonne and J. -P. Chen and S. Choi and E. Chudakov and E. Cisbani and F. Cusanno and M. M. Dalton and C. Dutta and K. Egiyan and C. Fernandez-Ramirez and R. Feuerbach and K. G. Fissum and S. Frullani and F. Garibaldi and O. Gayou and R. Gilman and S. Gilad and J. Goity and J. Gomez and B. Hahn and D. Hamilton and J. -O. Hansen and J. Huang and R. Igarashi and D. Ireland and C. W. de Jager and X. Jin and X. Jiang and T. Jinasundera and J. Kellie and C. E. Keppel and N. Kolb and J. LeRose and N. Liyanage and K. Livingston and D. McNulty and L. Mercado and R. Michaels and M. Mihovilovic and S. Qian and X. Qian and S. Mailyan and V. Mamyan and S. Marrone and P. Monaghan and S. Nanda and C. F. Perdrisat and E. Piasetzky and D. Protopopescu and V. Punjabi and Y. Qiang and I. A. Rachek and A. Rakhman and G. Ron and G. Rosner and A. Saha and B. Sawatzky and A. Shahinyan and S. Sirca and N. Sparveris and R. R. Subedi and R. Suleiman and I. Strakovsky and V. Sulkosky and J. Moinelo and H. Voskanyan and K. Wang and Y. Wang and J. Watson and D. Watts and B. Wojtsekhowski and R. L. Workman and H. Yao and X. Zhan and Y. Zhang},
journal= {arXiv preprint arXiv:1501.05607},
year = {2015}
}
备注
5 pages, 6 figures