π介子和K介子的碰撞参数与横向电荷密度
Impact parameter and transverse charge densities of the pion and kaon
- University of Regina(瑞吉纳大学)
- Universitas Indonesia(印度尼西亚大学)
- Hiroshima University(广岛大学)
机构由 AI 辅助整理,请以论文原文为准。
中文总结 AI 辅助
本研究利用协变NJL模型中的GPDs,研究了π和K介子的碰撞参数与横向电荷密度,揭示了倾斜度对分布的影响,为强子空间结构和QCD动力学提供了检验。
中文摘要 AI 辅助
碰撞参数和横向电荷密度提供了关于强子结构的空间分辨信息,并探测动力学手征对称性破缺与SU(3)味对称性破缺之间的相互作用。我们利用协变Nambu--Jona-Lasinio模型中的非极化矢量广义部分子分布(GPDs),在非零倾斜度ξ下研究了π介子和K介子的价夸克分布,紫外发散通过Schwinger固有时间方案进行调节。增加ξ会使分布向较小的x方向移动,降低其在b⊥=0处的中心幅度,并展宽其横向轮廓。这些结果提供了对π介子和K介子空间结构的洞察,并为非微扰QCD动力学提供了严格的检验,与杰斐逊实验室和电子-离子对撞机即将进行的测量相关。
英文摘要
The impact parameter and transverse charge densities provide spatially resolved information on hadron structure and probe the interplay between dynamical chiral symmetry breaking and SU(3)-flavor symmetry breaking. We investigate the valence-quark distributions of the pion and kaon using their unpolarized vector GPDs at nonzero skewness $ξ$ within the covariant Nambu--Jona-Lasinio model, with ultraviolet divergences regulated by the Schwinger proper-time scheme. Increasing $ξ$ shifts the distributions toward smaller $x$, reduces their central magnitude at $b_\perp=0$, and broadens their transverse profiles. These results provide insight into the spatial structure of the pion and kaon and offer stringent tests of nonperturbative QCD dynamics, with relevance to forthcoming measurements at Jefferson Lab and the Electron-Ion Collider.