Transition from real to virtual polarized photon structures

Abstract

We investigate the transition of the polarized photon structure function $g_1^{\gamma }(x,Q^2,P^2)$ when the target photon shifts from on-shell ($P^2=0$) to far off-shell ($P^2\gg {\Lambda }^2$) region. The analysis is performed to the next-to-leading order in QCD. The first moment of $g_1^{\gamma }$ which vanishes for the real photon, turns to be a negative value when target photon becomes off-shell. The explicit $P^2$-dependence of the first moment sum rule as well as of the structure function $g_1^{\gamma }(x,Q^2,P^2)$ as a function of $x$ is studied in the framework of the vector meson dominance model.

16 pages, 4 eps figures

References in corpus (10)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Theory of hard photoproduction
• New NLO Parametrizations of the Parton Distributions in Real Photons
• Spin-Dependent Structure Functions of Real and Virtual Photons
• Spin-Dependent Structure Functions of the Photon
• The Polarised Photon $g_1^{\gamma }$ Sum Rule at the Linear Collider and High Luminosity B Factories
• Polarized Virtual Photon Structure Function $g_2^{\gamma }$ and Twist-3 Effects in QCD
• The $alphaalph{a}_s^2$ corrections to the first moment of the polarized virtual photon structure function $g_1^{g}amma(x,Q^2,P^2)$
• Target Mass Effects in Polarized Virtual Photon Structure Functions
• Mass effects in the polarized virtual photon structure

Cited by in corpus (4)

• Discriminating 4D supersymmetry from its 5D warped version
• $O({\alpha }_s^2$) Polarized Heavy Flavor Corrections}to Deep-Inelastic Scattering at $Q^2\gg m^2$
• The U(1)_A Anomaly and QCD Phenomenology
• Polarized Structure Functions and Two-Photon Physics at Super-B