Importance of a Measurement of F_L(x,Q^2) at HERA

Details Importance of a Measurement of F_L(x,Q^2) at HERA Importance of a Measurement of F_L(x,Q^2) at HERA

2005-11-30

arxiv.org/abs/hep-ph/0511351v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

To be published in the proceedings of the Ringberg Workshop on "New Trends in HERA Physics 2005"

Scientific paper

I investigate what a direct measurement of the longitudinal structure function F_L(x,Q^2) 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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