Direct measurement of the longitudinal proton structure function at HERA

The first direct measurements of the longitudinal proton structure function F L ( x , Q 2 ) at HERA are reported. The measurements were performed by the H1 and ZEUS collaborations. They are based on inclusive deep inelastic e + p scattering cross sections with a positron beam energy of 27.5 GeV and...

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Bibliographic Details
Published in:Nuclear physics. Section B, Proceedings supplement Proceedings supplement, 2009, Vol.186, p.39-42
Main Author: Lobodzinska, E.M.
Format: Article
Language:English
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Summary:The first direct measurements of the longitudinal proton structure function F L ( x , Q 2 ) at HERA are reported. The measurements were performed by the H1 and ZEUS collaborations. They are based on inclusive deep inelastic e + p scattering cross sections with a positron beam energy of 27.5 GeV and proton beam energies of 920, 575 and 460 GeV. The F L values agree with higher order QCD calculations based on parton densities obtained using cross section data previously measured at HERA.
ISSN:0920-5632
1873-3832
DOI:10.1016/j.nuclphysbps.2008.12.009