利用CLAS测量0.01<$Q^2$<1 GeV$^2$范围内的核子自旋结构函数
核实验
2026-01-06 v4
摘要
在2006年杰斐逊实验室的EG4实验中，测量了质子和氘核的自旋结构函数。实验使用CEBAF大接受度谱仪（CLAS），以纵向极化的NH和ND为靶，收集了纵向极化电子散射数据，对应的值分别低至0.012和0.02 GeV。本文是EG4实验的存档论文，总结了先前报道的关于质子和氘核的极化结构函数、及其矩、和的结果。此外，我们报告了通过结合质子和氘核数据并修正费米涂抹效应而提取的新的中子结果，以及直接由质子和氘核矩构成的电子矩、和。我们的数据与质子、氘核和中子的Gerasimov-Drell-Hearn求和规则符合良好。此外，我们构建了的等矢量组合以及Bjorken积分，并与现有的理论预言进行了比较。我们的所有结果首次在范围与π介子质量相当的条件下，对手征有效场论（EFT）的自旋可观测量预言进行了广泛检验，并激励了如格点规范理论等其他方法对手征有效场论计算的进一步改进。
关键词
引用
@article{arxiv.2409.08365,
title = {Measurement of the nucleon spin structure functions for 0.01<$Q^2$<1 GeV$^2$ using CLAS},
author = {A. Deur and S. E. Kuhn and M. Ripani and X. Zheng and A. G. Acar and P. Achenbach and K. P. Adhikari and J. S. Alvarado and M. J. Amaryan and W. R. Armstrong and H. Atac and H. Avakian and L. Baashen and N. A. Baltzell and L. Barion and M. Bashkanov and M. Battaglieri and B. Benkel and F. Benmokhtar and A. Bianconi and A. S. Biselli and W. A. Booth and F. B ossu and P. Bosted and S. Boiarinov and K. Th. Brinkmann and W. J. Briscoe and S. Bueltmann and V. D. Burkert and D. S. Carman and P. Chatagnon and J. P. Chen and G. Ciullo and P. L. Cole and M. Contalbrigo and V. Crede and A. D'Angelo and N. Dashyan and R. De Vita and M. Defurne and S. Diehl and C. Djalali and V. A. Drozdov and R. Dupre and H. Egiyan and A. El Alaoui and L. El Fassi and L. Elouadrhiri and P. Eugenio and J. C. Faggert and S. Fegan and R. Fersch and A. Filippi and K. Gates and G. Gavalian and G. P. Gilfoyle and R. W. Gothe and L. Guo and H. Hakobyan and M. Hattawy and F. Hauenstein and D. Heddle and A. Hobart and M. Holtrop and D. G. Ireland and E. L. Isupov and H. Jiang and H. S. Jo and S. Joosten and H. Kang and C. Keith and M. Khandaker and W. Kim and F. J. Klein and V. Klimenko and P. Konczykowski and K. Kovacs and A. Kripko and V. Kubarovsky and L. Lanza and S. Lee and P. Lenisa and X. Li and E. Long and I. J. D. MacGregor and D. Marchand and V. Mascagna and D. Matamoros and B. McKinnon and D. Meekins and S. Migliorati and T. Mineeva and M. Mirazita and V. Mokeev and C. Munoz-Camacho and P. Nadel-Turonski and T. Nagorna and K. Neupane and S. Niccolai and M. Osipenko and A. I. Ostrovidov and P. Pandey and M. Paolone and L. L. Pappalardo and R. Paremuzyan and E. Pasyuk and S. J. Paul and W. Phelps and S. K. Phillips and J. Pierce and N. Pilleux and M. Pokhrel and J. W. Price and Y. Prok and A. Radic and T. Reed and J. Richards and G. Rosner and P. Rossi and A. A. Rusova and C. Salgado and A. Schmidt and R. A. Schumacher and Y. G. Sharabian and E. V. Shirokov and U. Shrestha and S. Sirca and K. Slifer and N. Sparveris and M. Spreafico and S. Stepanyan and I. I. Strakovsky and S. Strauch and V. Sulkosky and J. A. Tan and M. Tenorio and N. Trotta and R. Tyson and M. Ungaro and D. W. Upton and S. Vallarino and L. Venturelli and H. Voskanyan and E. Voutier and D. P. Watts and X. Wei and M. H. Wood and N. Zachariou and J. Zhang and M. Zurek},
journal= {arXiv preprint arXiv:2409.08365},
year = {2026}
}
备注
33 pages. 26 figures. Data tables in csv format are available as supplementary material on Phys. Rev. C site