Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-08-03
Eur.Phys.J.C70:999-1007,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 9 eps figures (two figures are added)
Scientific paper
10.1140/epjc/s10052-010-1494-0
We discuss the resummation of the large logarithmic terms appearing in the heavy quark effects on parton distribution functions inside the virtual photon. We incorporate heavy quark mass effects by changing the initial condition of the leading-order DGLAP evolution equation. In a certain kinematical limit, we recover the logarithmic terms of the next-to-leading order heavy quark effects obtained in the previous work. This method enables us to resum the large logarithmic terms due to heavy quark mass effects on the parton distributions in the virtual photon. We numerically calculate parton distributions using the formulae derived in this work, and discuss the property of the resummed heavy quark effects.
Kitadono Yoshio
Sahara Ryo
Ueda Takahiro
Uematsu Tsuneo
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