O(α_S) Corrections to the Photon Structure Functions F^γ₂(x,Q²) and F_L^γ(x,Q²)

1993/03/03 by E. Laenen, Laenen, E., S. Riemersma +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9303214

Latex 22 pages (16 figures available upon request), ITP-SB-93-1, FERMILAB-Pub-93/033-T

arxiv created 1993/03/15 · arxiv updated 2009/11/30

Abstract

We examine the QCD corrections to the structure functions F₂^γ(x,Q²) and F_L^γ(x,Q²) for a real photon target. The pointlike photon contributions from light and heavy quarks are computed through O(αα_S). A parameterization of the hadronic (resolved) photon contribution is also included and a comparison is made with the present experimental data. We find that while the pointlike contributions are large for F₂^γ(x,Q²), they are the dominant part of F_L^γ(x,Q²). For Q² > 50 (\rm GeV/c)² the charm component is as least as large as the light quark component.

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