质子束中反子-子对光产生交叉截面
高能物理 - 实验
2026-05-12 v2 核实验
核理论
摘要
Jefferson Lab 的 GlueX 实验已观察到 以及首次观察到 和 从质子靶向的光子产生，光子能量最高可达 11.6 GeV。所有产生的粒子对的角分布均呈现前向峰，符合 Regge 类 频道交换模型。非对称的宽角反子分布显示了额外过程的存在。在现象学模型中，我们发现与双 频道交换过程一致，其中反子仅在中间顶点产生。该模型通过少量自由参数匹配所有观测到的分布。在超子通道中，我们观察到 与 系统光子产生之间存在明确区别，但总体上与 系统相似。我们报告了总交叉截面以及相对于产生粒子对动量传递和不变质量的微分截面。未在这些反应通道中发现窄共振结构。 夸克对相对于 夸克对的抑制，类似于在其他反应中所观察到的。
引用
@article{arxiv.2510.26890,
title = {Baryon-antibaryon photoproduction cross sections off the proton},
author = {GlueX Collaboration and F. Afzal and M. Albrecht and M. Amaryan and S. Arrigo and V. Arroyave and A. Asaturyan and A. Austregesilo and Z. Baldwin and F. Barbosa and J. Barlow and E. Barriga and R. Barsotti and D. Barton and V. Baturin and V. V. Berdnikov and A. Berger and W. Boeglin and M. Boer and W. J. Briscoe and T. Britton and R. Brunner and S. Cao and C. Chen and E. Chudakov and G. Chung and P. L. Cole and O. Cortes and V. Crede and M. M. Dalton and D. Darulis and A. Deur and L. Dietrich and S. Dobbs and A. Dolgolenko and M. Dugger and R. Dzhygadlo and D. Ebersole and M. Edo and H. Egiyan and P. Eugenio and A. Fabrizi and C. Fanelli and S. Fang and M. Fritsch and S. Furletov and L. Gan and H. Gao and A. Gardner and A. Gasparian and D. I. Glazier and C. Gleason and B. Grube and J. Guo and J. Hernandez and K. Hernandez and N. Herrmann and N. D. Hoffman and D. Hornidge and G. M. Huber and P. Hurck and W. Imoehl and D. G. Ireland and M. M. Ito and I. Jaegle and N. S. Jarvis and T. Jeske and M. Jing and R. T. Jones and V. Kakoyan and G. Kalicy and X. Kang and V. Khachatryan and C. Kourkoumelis and A. LaDuke and I. Larin and D. Lawrence and D. I. Lersch and H. Li and B. Liu and K. Livingston and L. Lorenti and V. Lyubovitskij and H. Marukyan and V. Matveev and M. McCaughan and M. McCracken and C. A. Meyer and R. Miskimen and R. E. Mitchell and P. Moran and L. Ng and E. Nissen and S. Orešić and A. I. Ostrovidov and Z. Papandreou and L. Pentchev and K. J. Peters and L. Puthiya Veetil and S. Rakshit and J. Reinhold and A. Remington and J. Ritman and G. Rodriguez and K. Saldana and S. Schadmand and A. M. Schertz and K. Scheuer and A. Schmidt and R. A. Schumacher and J. Schwiening and M. Scott and N. Septian and P. Sharp and V. J. Shen and X. Shen and M. R. Shepherd and J. Sikes and H. Singh and A. Smith and E. S. Smith and A. Somov and S. Somov and J. R. Stevens and I. I. Strakovsky and B. Sumner and K. Suresh and V. V. Tarasov and S. Taylor and A. Teymurazyan and A. Thiel and M. Thomson and T. Viducic and T. Whitlatch and Y. Wunderlich and B. Yu and J. Zarling and Z. Zhang and X. Zhou and B. Zihlmann},
journal= {arXiv preprint arXiv:2510.26890},
year = {2026}
}
备注
34 pages, 29 figures, 7 tables, 1 algorithm