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hep-ph2007
Effective Coupling Constant in Renormalization Group for the Quantum Electrodynamics
Hirohisa Ishikawa, Keiji Watanabe
Effective coupling constant in quantum electrodynamics is investigated. A pole appears in the effective coupling constant for the space-like momentum if it is calculated by perturb…
hep-ph2001
Analysis of pion electromagnetic form factor by the dispersion relation with QCD constraint
Keiji Watanabe, Hirohisa Ishikawa, Masami Nakagawa
The pion electromagnetic form factor is investigated by using the dispersion relation with the superconvergence condition, which was proposed to synthesize the vector meson dominan…