π⁰ 电生反应截面的 Rosenbluth 分离
高能物理 - 实验
2016-12-28 v1 核实验
摘要
本文展示了深度虚 π⁰ 电生反应截面测量结果，数据取自杰斐逊实验室 A 厅进行的 E07-007 实验，在 =0.36 及三个不同 值（1.5 至 2 GeV）下获取。采用 Rosenbluth 技术分离纵向与横向响应。结果表明，截面主要由横向分量主导，因而远未达到微扰量子色动力学预言的渐近极限。同时测得的干涉项 提供了非零纵向贡献的迹象。结果与基于广义部分子分布（GPDs）领先扭度方法的多个模型进行了比较。特别地，与将核子手征奇（横量）GPDs 与扭度-3 介子分布振幅卷积来描述散射振幅的模型取得了较好的一致。因此，中性介子电生反应可能为通过实验获取横量 GPDs 提供令人振奋的可能性。
引用
@article{arxiv.1608.01003,
title = {Rosenbluth separation of the $\pi^0$ electroproduction cross section},
author = {M. Defurne and M. Mazouz and H. Albataineh and K. Allada and K. A. Aniol and V. Bellini and M. Benali and W. Boeglin and P. Bertin and M. Brossard and A. Camsonne and M. Canan and S. Chandavar and C. Chen and J. -P. Chen and C. W. de Jager and R. de Leo and C. Desnault and A. Deur and L. El Fassi and R. Ent and D. Flay and M. Friend and E. Fuchey and S. Frullani and F. Garibaldi and D. Gaskell and A. Giusa and O. Glamazdin and S. Golge and J. Gomez and O. Hansen and D. Higinbotham and T. Holmstrom and T. Horn and J. Huang and M. Huang and C. E. Hyde and S. Iqbal and F. Itard and H. Kang and A. Kelleher and C. Keppel and S. Koirala and I. Korover and J. J. LeRose and R. Lindgren and E. Long and M. Magne and J. Mammei and D. J. Margaziotis and P. Markowitz and A. Marti Jimenez-Arguello and F. Meddi and D. Meekins and R. Michaels and M. Mihovilovic and C. Munoz Camacho and P. Nadel-Turonski and N. Nuruzzaman and R. Paremuzyan and A. Puckett and V. Punjabi and Y. Qiang and A. Rakhman and M. N. H. Rashad and S. Riordan and J. Roche and G. Russo and F. Sabati and K. Saenboonruang and A. Saha and B. Sawatzky and L. Selvy and A. Shahinyan and S. Sirca and P. Solvignon and M. L. Sperduto and R. Subedi and V. Sulkosky and C. Sutera and W. A. Tobias and G. M. Urciuoli and D. Wang and B. Wojtsekhowski and H. Yao and Z. Ye and A. Zafar and X. Zhan and J. Zhang and B. Zhao and Z. Zhao and X. Zheng and P. Zhu},
journal= {arXiv preprint arXiv:1608.01003},
year = {2016}
}
备注
Submitted to Physical Review Letters