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 ...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.展开更多
In this study,we systematically investigate theφmeson and nucleus interaction by analyzing and fitting the cross sections ofγN→φN reactions near the threshold,where N represents the nucleus.Using the vector meson ...In this study,we systematically investigate theφmeson and nucleus interaction by analyzing and fitting the cross sections ofγN→φN reactions near the threshold,where N represents the nucleus.Using the vector meson dominant model,the distribution of theφ-N scattering length is presented as a function of energy,and the results show that there is a slight increase in scattering length with increasing energy.Based on this,the average scattering length of aφ-proton is obtained as 0.10±0.01 fm by combining experimental data and theoretical models.Moreover,the average scattering length of theφ-deuteron interaction is derived to be 0.014±0.002 fm for the first time.Furthermore,the effect of the momentum transfer|tmin|on theφ-N scattering length at the threshold is discussed.The obtained results not only provide important theoretical information for a more comprehensive and accurate study of theφ-N scattering length,but also a basis for future experimental measurements ofφmeson production.展开更多
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)
文摘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.
基金Supported by the National Natural Science Foundation of China(12065014,12047501)the Natural Science Foundation of Gansu province(22JR5RA266)the West Light Foundation of The Chinese Academy of Sciences(21JR7RA201)。
文摘In this study,we systematically investigate theφmeson and nucleus interaction by analyzing and fitting the cross sections ofγN→φN reactions near the threshold,where N represents the nucleus.Using the vector meson dominant model,the distribution of theφ-N scattering length is presented as a function of energy,and the results show that there is a slight increase in scattering length with increasing energy.Based on this,the average scattering length of aφ-proton is obtained as 0.10±0.01 fm by combining experimental data and theoretical models.Moreover,the average scattering length of theφ-deuteron interaction is derived to be 0.014±0.002 fm for the first time.Furthermore,the effect of the momentum transfer|tmin|on theφ-N scattering length at the threshold is discussed.The obtained results not only provide important theoretical information for a more comprehensive and accurate study of theφ-N scattering length,but also a basis for future experimental measurements ofφmeson production.
