Mass dependence of pseudoscalar meson elastic form factors

被引:54
作者
Chen, Muyang [1 ]
Ding, Minghui [1 ,2 ]
Chang, Lei [1 ]
Roberts, Craig D. [2 ]
机构
[1] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA
关键词
EXCLUSIVE PROCESSES; PION; ELECTROPRODUCTION; BREAKING; BEHAVIOR; THEOREM; QCD;
D O I
10.1103/PhysRevD.98.091505
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A continuum approach to quark-antiquark bound-states is used to determine the electromagnetic form factors of pionlike mesons with masses m(0)-/GeV = 0.14, 0.47, 0.69, 0.83 on a spacelike domain that extends to Q(2) less than or similar to 10 GeV2. The results enable direct comparisons with contemporary lattice-QCD calculations of heavy-pion form factors at large values of momentum transfer and aid in understanding them. They also reveal, inter alia, that the form factor of the physical pion provides the best opportunity for verification of the factorized hard-scattering formula relevant to this class of exclusive processes and that this capacity diminishes steadily as the meson mass increases.
引用
收藏
页数:7
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