The Longitudinal Structure Function FL as a Function of F2 and dF2/dlnQ2 at small x. The Next-to-Leading Analysis
A. V. Kotikov, G. Parente
Abstract
We present a set of formulae to extract the longitudinal deep inelastic structure function FL from the transverse structure function F2 and its derivative dF2/dlnQ2 at small x. Our expressions are valid for any value of δ, being x-δ the behavior of the parton densities at low x. Using F2 HERA data we obtain FL in the range 10-4 ≤ x ≤ 10-2 at Q2=20 GeV2. Some other applications of the formulae are pointed out.
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