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Off-Shell Photon Light-Cone Transverse Wavefunction at Leading Twist |
| YU Ran;LIU Jue-Ping;ZHU Kai |
| College of Physics and Technology, Wuhan University, Wuhan 430072 |
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| Cite this article: |
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YU Ran, LIU Jue-Ping, ZHU Kai 2005 Chin. Phys. Lett. 22 2415-2518 |
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Abstract The explicit expression of the transverse photon wavefunction Фγ⊥(u,P2) at the leading twist with the on-shell and the off-shell momenta are calculated in the effective low-energy theory derived from the instanton vacuum of QCD, where both the space-like region as well as the time-like one of the momenta for the virtual photons are investigated. In addition, the problem about the consistency between the two different definitions of the transverse photon wavefunction with chiral-odd Dirac structure, σμv, has been considered, and proven to be true at the leading order by means of the sum rule method. A brief discussion of the dependence of the transverse light-cone photon wavefunction Фγ⊥(u,P2) nd its coupling, Fγ⊥(u,P2) to the corresponding quark--antiquark current with respect to P2, and that about the end-point behaviour of the transverse photon wavefunction is given.
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| Keywords:
11.15.Tk
12.38.Lg
11.55.Hx
14.70.Bh
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Published: 01 October 2005
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