Gluon gravitational form factors of protons from charmonium photoproduction  

作　　者：王晓云 曾凡聪 王全进 Xiao-Yun Wang;Fancong Zeng;Quanjin Wang(Department of physics,Lanzhou University of Technology,Lanzhou 730050,China;Lanzhou Center for Theoretical Physics,Key Laboratory of Theoretical Physics of Gansu Province,Lanzhou University,Lanzhou 730000,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Department of physics,Lanzhou University of Technology,Lanzhou 730050,China [2]Lanzhou Center for Theoretical Physics,Key Laboratory of Theoretical Physics of Gansu Province,Lanzhou University,Lanzhou 730000,China [3]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics C》2023年第7期81-88,共8页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(12065014,12047501);the Natural Science Foundation of Gansu province,China(22JR5RA266);the West Light Foundation of the Chinese Academy of Sciences(21JR7RA201)

摘　　要：Inspired by the recent near-threshold J/ψphotoproduction measurements,we discuss gluon gravitational form factors(GFFs)and internal properties of the proton.This work presents a complete analysis of the proton gluon GFFs connecting the gluon part of the energy-momentum tensor and the heavy quarkonium photoproduction.In particular,a global fitting of the J/ψdifferential and total cross section experimental data is used to determine the gluon GFFs as functions of the squared momentum transfer t.Combined with the quark contributions to the D-term form factor extracted from the deeply virtual Compton scattering experiment,the total D-term is obtained to investigate their applications in describing the proton mechanical properties.These studies provide a unique perspective on investigating the proton gluon GFFs and important information for enhancing QCD constraints on the gluon GFFs.

关 键 词：gravitational form factors properties of the proton charmonium photoproduction 

分 类 号：O572.243[理学—粒子物理与原子核物理]