Off-shell photon light-cone wave functions with odd chirality
College of Physics and Technology, Wuhan University, 430072, Wuhan, PRC
Accepted: 30 May 2006
Published online: 10 July 2006
Based on a more reasonable simulation method for dealing with the Λ-parameter characterizing the pole form for the form factor (the Fourier transform of the instanton zero mode), and a unified way for regularizing the integrals appearing in the expressions of the light-cone photon wave functions, the transverse photon wave function (u, P 2) at the leading twist with the on-shell or off-shell momentum have been re-examined in the effective low-energy theory derived from the instanton vacuum, and the twist-two parts of the other two photon wave functions, h (s), twisttwo γ || (u, P 2) and h (t), twisttwo γ || (u, P 2), with odd chirality are calculated based on the Wandzura-Wilczek-like relations as well. A brief discussion of the dependence of the coupling f γ ⊥(P 2) and the light-cone photon wave functions with respect to P2 and the end-point behavior of the photon wave functions are given.
PACS: 11.15.Tk Other nonperturbative techniques – / 12.38.Lg Other nonperturbative calculations – / 11.55.Hx Sum rules – / 14.70.Bh Photons –
© Società Italiana di Fisica and Springer-Verlag, 2006