Parton Distribution Functions from a Light Front Hamiltonian and QCD Evolution for Light Mesons

被引：80

作者：

Lan, Jiangshan ^{[1
,2
]}

Mondal, Chandan ^{[1
]}

Jia, Shaoyang ^{[3
]}

Zhao, Xingbo ^{[1
,2
]}

Vary, James P. ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 122卷 / 17期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

LEPTON-PAIR PRODUCTION; MASS MUON PAIRS; DRELL-YAN; PION; COLLISIONS; NUCLEON;

D O I：

10.1103/PhysRevLett.122.172001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We obtain the pion and the kaon parton distribution functions from the eigenstates of a light front effective Hamiltonian in the constituent quark-antiquark representation suitable for low-momentum scale applications. By taking these scales as the only free parameters, the valence quark distribution functions of the pion, after QCD evolution, are consistent with the data from the FNAL-E615 experiment. The ratio of the up quark distribution of the kaon to that of the pion also agrees with the CERN-NA3 experiment. Supplemented by known parton distribution functions for the nucleons, we further obtain the cross section consistent with experimental data for the pi(-) nucleus -> mu(+)mu(-) X Drell-Yan process.

引用

页数：7

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