Proton and pion distribution functions in counterpoint

被引：35

作者：

Lu, Ya ^{[1
,2
,3
]}

Chang, Lei ^{[4
]}

Raya, Khepani ^{[5
,6
]}

Roberts, Craig D. ^{[1
,2
]}

Rodriguez-Quintero, Jose ^{[7
,8
]}

机构：

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

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

[3] Nanjing Tech Univ, Dept Phys, Nanjing 211816, Peoples R China

[4] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China

[5] Univ Granada, Dept Fis Teor & Cosmos, E-18071 Granada, Spain

[6] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Cdmx 04510, Mexico

[7] Univ Huelva, Dept Integrated Sci, E-21071 Huelva, Spain

[8] Univ Huelva, Ctr Adv Studies Phys Math & Computat, E-21071 Huelva, Spain

来源：

PHYSICS LETTERS B | 2022年 / 830卷

基金：

中国国家自然科学基金;

关键词：

Continuum Schwinger function methods; Emergence of mass; Pion structure; Proton structure; Parton distributions; Strong interactions in the standard model of particle physics; ASYMPTOTIC FREEDOM; SYMMETRY-BREAKING; NUCLEON; QUARK; SPIN; SCATTERING; SUM; QCD;

D O I：

10.1016/j.physletb.2022.137130

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Working with proton and pion valence distribution functions (DFs) determined consistently at the same, unique hadron scale and exploiting the possibility that there is an effective charge which defines an evolution scheme for DFs that is all-orders exact, we obtain a unified body of predictions for all proton and pion DFs - valence, glue, and four-flavour-separated sea. Whilst the hadron light-front momentum fractions carried by identifiable parton classes are the same for the proton and pion at any scale, the pointwise behaviour of the DFs is strongly hadron-dependent. All calculated distributions comply with quantum chromodynamics constraints on low- and high-x scaling behaviour and, owing to emergent hadron mass, pion DFs are the most dilated. These results aid in elucidating the sources of similarities and differences between proton and pion structure. (C) 2022 The Author(s). Published by Elsevier B.V.

引用

页数：7

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