| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1851344 | Physics Letters B | 2008 | 8 Pages |
Abstract
A first measurement is reported of the longitudinal proton structure function FL(x,Q2)FL(x,Q2) at the ep collider HERA. It is based on inclusive deep inelastic e+pe+p scattering cross section measurements with a positron beam energy of 27.5 GeV27.5 GeV and proton beam energies of 920, 575 and 460 GeV460 GeV. Employing the energy dependence of the cross section, FLFL is measured in a range of squared four-momentum transfers 12⩽Q2⩽90 GeV212⩽Q2⩽90 GeV2 and low Bjorken x0.00024⩽x⩽0.0036. The FLFL values agree with higher order QCD calculations based on parton densities obtained using cross section data previously measured at HERA.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
F.D. Aaron, C. Alexa, V. Andreev, B. Antunovic, S. Aplin, A. Asmone, A. Astvatsatourov, A. Bacchetta, S. Backovic, A. Baghdasaryan, P. Baranov, E. Barrelet, W. Bartel, M. Beckingham, K. Begzsuren, O. Behnke, A. Belousov, N. Berger, J.C. Bizot,