利用横向极化电子散射揭示色力
核实验
2019-01-23 v4
摘要
核子自旋不对称性实验（SANE）使用极化质子靶和极化电子束在 4.7 GeV 和 5.9 GeV 两种束流能量下测量了两个双自旋不对称性。一个大接收度的开放构型探测器包在 40 处鉴别散射电子，并覆盖了布约肯 的宽广范围（）。与平均色洛伦兹力成正比的 twist-3 矩阵元 由在 值从 2.0 到 6.0 GeV 范围内测得的不对称性提取得到。数据显示出与大多数夸克模型（包括格点 QCD 结果）相反的符号，以及一种看似出乎意料的标度依赖性。此外，当与同一 范围内的中子数据结合时，结果表明一种与味无关的平均色洛伦兹力。
引用
@article{arxiv.1805.08835,
title = {Revealing Color Forces with Transverse Polarized Electron Scattering},
author = {W. Armstrong and H. Kang and A. Liyanage and J. Maxwell and J. Mulholland and L. Ndukum and A. Ahmidouch and I. Albayrak and A. Asaturyan and O. Ates and H. Baghdasaryan and W. Boeglin and P. Bosted and E. Brash and C. Butuceanu and M. Bychkov and P. Carter and C. Chen and J. -P. Chen and S. Choi and M. E. Christy and S. Covrig and D. Crabb and S. Danagoulian and A. Daniel and A. M. Davidenko and B. Davis and D. Day and W. Deconinck and A. Deur and J. Dunne and D. Dutta and L. El Fassi and C. Ellis and R. Ent and D. Flay and E. Frlez and D. Gaskell and O. Geagla and J. German and R. Gilman and T. Gogami and J. Gomez and Y. M. Goncharenko and O. Hashimoto and D. Higinbotham and T. Horn and G. M. Huber and M. Jones and M. K. Jones and N. Kalantarians and H-K. Kang and D. Kawama and C. Keith and C. Keppel and M. Khandaker and Y. Kim and P. M. King and M. Kohl and K. Kovacs and V. Kubarovsky and Y. Li and N. Liyanage and W. Luo and D. Mack and V. Mamyan and P. Markowitz and T. Maruta and D. Meekins and Y. M. Melnik and Z. -E. Meziani and A. Mkrtchyan and H. Mkrtchyan and V. V. Mochalov and P. Monaghan and A. Narayan and S. N. Nakamura and A. Nuruzzaman and L. Pentchev and D. Pocanic and M. Posik and A. Puckett and X. Qiu and J. Reinhold and S. Riordan and J. Roche and O. A. Rondón and B. Sawatzky and M. Shabestari and K. Slifer and G. Smith and L. F. Soloviev and P. Solvignon and V. Tadevosyan and L. Tang and A. N. Vasiliev and M. Veilleux and T. Walton and F. Wesselmann and S. Wood and H. Yao and Z. Ye and J. Zhang and L. Zhu},
journal= {arXiv preprint arXiv:1805.08835},
year = {2019}
}