$F_L$ at low $x$ and low $Q^2$

Details $F_L$ at low $x$ and low $Q^2$ $F_L$ at low $x$ and low $Q^2$

1996-03-05

arxiv.org/abs/hep-ph/9603231v1

Acta Phys.Polon.B27:1353-1368,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

talk given at the Epiphany Conference Cracow, 5-6 Jan 1996, 12 pages, Latex, 4 uuencoded ps figures

Scientific paper

A model for the longitudinal structure function $F_L$ in the region of low $x$ and low $Q^2$ is discussed. It is constructed using the $k_T$ factorization theorem and a photon-gluon fusion mechanism suitably extrapolated to the region of low $Q^2$. A phenomenological model for higher twist is presented, which is based on the assumption that the contribution of quarks having limited transverse momenta is dominated by the soft pomeron exchange mechanism.

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