Measurement of the longitudinal structure function and the smallx gluon density of the proton |
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| Authors: | A. M. Cooper-Sarkar G. Ingelman K. R. Long R. G. Roberts D. H. Saxon |
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| Affiliation: | 1. Rutherford Appleton Laboratory, OX11 0QX, Didcot, Oxon, England
2. DESY, Notkestrasse 85, D-2000, Hamburg 52, Federal Republic of Germany
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| Abstract: | At HERA energies the smallx region (x?10?2) can be explored atQ 2 values large enough that leading twist QCD calculations are valid. We show how measurement of the longitudinal structure function,F L (x,Q 2), can lead to accurate measurement of the gluon structure function at such smallx values. Experimental systematic errors are discussed fully and requirements for the measurement outlined. We conclude that it should be possible to distinguish between the widely varying gluon distributions which are currently allowed. |
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