Onset of scaling violation in pion and kaon elastic electromagnetic form factors

被引：11

作者：

Yao, Zhao-Qian ^{[1
]}

Binosi, Daniele ^{[1
]}

Roberts, Craig D. ^{[2
,3
]}

机构：

[1] European Ctr Theoret Studies Nucl Phys & Related A, Villa Tambosi,Strada Tabarelle 286, I-38123 Villazzano, TN, Italy

[2] Nanjing Univ, Sch Phys, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Inst Nonperturbat Phys, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICS LETTERS B | 2024年 / 855卷

基金：

中国国家自然科学基金;

关键词：

Continuum Schwinger function methods; Elastic electromagnetic form factors; Emergence of mass; Hard exclusive processes; Nambu-Goldstone bosons; Scaling violations; DISTRIBUTION AMPLITUDES; EXCLUSIVE PROCESSES; HADRON; THEOREM; QCD;

D O I：

10.1016/j.physletb.2024.138823

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using a symmetry-preserving truncation of the quantum field equations describing hadron properties, parameterfree predictions are delivered for pion and kaon elastic electromagnetic form factors, F-P=pi,F-K, thereby unifying them with kindred results for nucleon elastic electromagnetic form factors. Regarding positive -charge states, the analysis stresses that the presence of scaling violations in QCD entails that Q(2)F(P)(Q(2)) should exhibit a single maximum on Q(2) > 0. Locating such a maximum is both necessary and sufficient to establish the existence of scaling violations. The study predicts that, for charged pi, K mesons, the Q(2)F(P)(Q(2)) maximum lies in the neighbourhood Q(2) similar or equal to 5 GeV2. Foreseeable experiments will test these predictions and, providing their Q(2) reach meets expectations, potentially also provide details on the momentum dependence of meson form factor scaling violation.

引用

页数：7

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