Small $x$ Contributions to the Structure Function $F_L(x,Q^2)$

Abstract

The gluon contributions to $F_L(x,Q^2)$ in $\mathcal{O}({\alpha }_s)$ are calculated taking into account the transverse momentum of the initial state parton. In comparison with collinear factorization $F_L(x,Q^2)$, is not affected at large $x$ but takes smaller values in the small $x$ range. The onset of the $k_{\perp }$ effect is a function of $Q^2$.

4 p., postscript encoded with uufiles; DESY 94--149

Cited by in corpus (1)

• The Longitudinal Heavy Quark Structure Function F_{L}^{Q\bar{Q}} in the Region Q^2 \gg m^2 at O(α_s^3)