【摘 要】
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Within the framework of the low-energy effective theory arising from the instanton vacuum model of QCD, thelongitudinal virtual photon light-cone wavefunction,
【机 构】
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College of Physics and Technology, Wuhan University, Wuhan 430072
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Within the framework of the low-energy effective theory arising from the instanton vacuum model of QCD, thelongitudinal virtual photon light-cone wavefunction, φγ‖ (u, P2), corresponding to the nonlocal quark-antiquarkvector current is calculated at the low-energy scale. The coupling constant, Fγ(P2) or equivalently fγ(P2), ofthe quark-antiquark vector current to the virtual photon state is also obtained by imposing the normalizationcondition to the photon wavefunction. The behaviour of the coupling constant as well as the obtained photonwavefunction is discussed.
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