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Importance of a measurement of F(L)(X,Q**2) at HERA.


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Article

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Thorne, Robert S 

Abstract

I investigate what a direct measurement of the longitudinal structure function FL(x,Q2) could teach us about the structure of the proton and the best way in which to use perturbative QCD for structure functions. I assume HERA running at a lowered beam energy for approximately 4-5 months and examine how well the measurement could distinguish between different theoretical approaches. I conclude that such a measurement would provide useful information on how to calculate structure functions and parton distributions at small x.

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High Energy Physics, Cavendish Laboratory, University of Cambridge

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