H1prelim-03-043

Determination of The Longitudinal Proton Structure Function F_L at low Q^2

Reference E Lobodzinska, presented at DIS 2003, Spring 2003
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Contact T Lastovicka
Abstract An extraction of the longitudinal proton structure function F_L(x,Q^2) from H1 data at low Q^2 \sim 1 GeV^2 is reported. The analysis is based on the data collected in a dedicated low Q^2 running period in 1999 and during shifted vertex runs in 2000. Two methods of extracting F_L(x,Q^2) are discussed. It is shown that results from both methods are consistent. Theoretical predictions are compared with the measured F_L(x,Q^2) points.
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