2008/01/07 by Yoshio Kitadono, Ken Sasaki, Takahiro Ueda +1 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.77.054019
published as Phys.Rev.D77:054019,2008 · 24 pages, LaTeX, 7 eps figures, REVTeX 4
arxiv created 2008/01/07 · openalex publication_date 2008/03/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate target mass effects in the unpolarized virtual photon structure functions F2^\ensuremathγ(x,Q2,P2) and FL^\ensuremathγ(x,Q2,P2) in perturbative QCD for the kinematical region \ensuremathΛ2\ensuremath≪P2\ensuremath≪Q2, where \ensuremath-Q2(\ensuremath-P2) is the mass squared of the probe (target) photon and \ensuremathΛ is the QCD scale parameter. We obtain the Nachtmann moments for the structure functions and then, by inverting the moments, we get the expressions in closed form for F2^\ensuremathγ(x,Q2,P2) up to the next-to-next-to-leading order and for FL^\ensuremathγ(x,Q2,P2) up to the next-to-leading order, both of which include the target mass corrections. Numerical analysis exhibits that target mass effects appear at large x and become sizable near xmax(=1/(1+\fracP2Q2)), the maximal value of x, as the ratio P2/Q2 increases.