利用 CLAS12 观测过程 $e p \rightarrow e \pi^{+}\pi^{-}X$ 中的束流自旋不对称性
高能物理 - 实验
2021-04-21 v2
摘要
本文报道了在未极化质子靶上的半inclusive深度非弹性散射中双π介子产生过程的束流自旋不对称性的观测结果。此处展示的数据于2018年秋季使用 CLAS12 谱仪获取，该谱仪采用 JLab 的 CEBAF 提供的 10.6 GeV 纵向自旋极化电子束。所测得的不对称性提供了首次提取部分子分布函数 的机会，该函数在共线框架下提供关于胶子与夸克之间相互作用的信息，且比以往测量具有更清晰的获取途径。这些不对称性也构成了首个对螺旋度依赖的双π介子碎裂函数 敏感的信号。在 质量附近观测到明显的符号变化，该变化出现在模型计算中，并表明所产生的π介子对碎裂夸克螺旋度的依赖性。
引用
@article{arxiv.2101.04842,
title = {Observation of Beam Spin Asymmetries in the Process $e p \rightarrow e \pi^{+}\pi^{-}X$ with CLAS12},
author = {T. B. Hayward and C. Dilks and A. Vossen and H. Avakian and S. Adhikari and G. Angelini and M. Arratia and H. Atac and C. Ayerbe Gayoso and N. A. Baltzell and L. Barion and M. Battaglieri and I. Bedlinskiy and F. Benmokhtar and A. Bianconi and A. S. Biselli and M. Bondì and F. Bossù and S. Boiarinov and W. J. Briscoe and W. K. Brooks and D. Bulumulla and V. D. Burkert and D. S. Carman and J. C. Carvajal and A. Celentano and P. Chatagnon and T. Chetry and G. Ciullo and B. A. Clary and P. L. Cole and M. Contalbrigo and G. Costantini and V. Crede and A. D'Angelo and N. Dashyan and R. De Vita and M. Defurne and A. Deur and S. Diehl and C. Djalali and R. Dupre and M. Dugger and H. Egiyan and M. Ehrhart and A. El Alaoui and L. El Fassi and L. Elouadrhiri and S. Fegan and A. Filippi and T. A. Forest and G. Gavalian and G. P. Gilfoyle and F. X. Girod and D. I. Glazier and A. A. Golubenko and R. W. Gothe and Y. Gotra and K. A. Griffioen and M. Guidal and K. Hafidi and H. Hakobyan and M. Hattawy and F. Hauenstein and K. Hicks and A. Hobart and M. Holtrop and D. G. Ireland and E. L. Isupov and H. S. Jo and K. Joo and S. Joosten and D. Keller and M. Khachatryan and A. Khanal and A. Kim and W. Kim and A. Kripko and V. Kubarovsky and S. E. Kuhn and L. Lanza and M. Leali and S. Lee and P. Lenisa and K. Livingston and I. J. D. MacGregor and D. Marchand and N. Markov and L. Marsicano and V. Mascagna and B. McKinnon and Z. E. Meziani and M. Mirazita and V. Mokeev and A Movsisyan and C. Munoz Camacho and P. Nadel-Turonski and P. Naidoo and S. Nanda and K. Neupane and S. Niccolai and G. Niculescu and T. R. O'Connell and M. Osipenko and M. Paolone and L. L. Pappalardo and R. Paremuzyan and E. Pasyuk and W. Phelps and O. Pogorelko and Y. Prok and B. A. Raue and M. Ripani and J. Ritman and A. Rizzo and P. Rossi and J. Rowley and F. Sabatié and C. Salgado and A. Schmidt and E. P. Segarra and Y. G. Sharabian and U. Shrestha and D. Sokhan and O. Soto and N. Sparveris and S. Stepanyan and I. I. Strakovsky and S. Strauch and A. Thornton and N. Tyler and R. Tyson and M. Ungaro and L. Venturelli and H. Voskanyan and E. Voutier and D. P. Watts and K. Wei and X. Wei and M. H. Wood and B. Yale and N. Zachariou and J. Zhang},
journal= {arXiv preprint arXiv:2101.04842},
year = {2021}
}
备注
6 pages, 5 figures