Pion Boer–Mulders function using a contact interaction

IF 4.8 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS The European Physical Journal C Pub Date : 2025-01-30 DOI:10.1140/epjc/s10052-025-13782-1

Dan-Dan Cheng, Zhu-Fang Cui, Minghui Ding, Craig D. Roberts, Sebastian M. Schmidt

引用次数: 0

Abstract

A symmetry preserving treatment of a vector \(\otimes \) vector contact interaction (SCI) is used as the basis for calculations of the two pion transverse momentum dependent parton distribution functions (TMDs); namely, that for unpolarised valence degrees-of-freedom and the analogous Boer–Mulders (BM) function. Amongst other things, the analysis enables the following themes to be addressed: the quark current mass dependence of pion TMDs; the impact of the gauge link model on the positivity constraint that bounds the BM function relative to the unpolarised TMD; the equivalence of direct diagrammatic and light-front wave function TMD calculations; and the size of the BM shift. Interpreted astutely, these SCI results enable one to draw insightful pictures of pion TMDs.

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使用接触相互作用的介子Boer-Mulders函数

利用矢量\(\otimes \)的对称保持处理方法，计算了两个介子横向动量相关的部分子分布函数（TMDs）；即，非极化价自由度和类似的Boer-Mulders （BM）函数。除其他事项外，分析使以下主题得以解决：介子tmd的夸克电流质量依赖性；规范链路模型对约束BM函数相对于非极化TMD的正性约束的影响；直接图和光前波函数TMD计算的等价性；以及BM位移的大小。对这些SCI结果进行敏锐的解释，可以让人们绘制出富有洞察力的π介子tmd图像。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.