Extraction of the gluon density of the proton at small x
Collaboration
13 pages
Published in:
- Phys.Lett.B 345 (1995) 576-588
Report number:
- DESY-94-192
Experiments:
Citations per year
Abstract: (Elsevier)
The gluon momentum density xg ( x , Q 2 ) of the proton was extracted at Q 2 = 20 GeV 2 for small values of x between 4 × 10 −4 and 10 −2 from the scaling violations of the proton structure function F 2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F 2 at low x constrained by measurementsfrom NMC at larger x ; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial increase of the gluon density is found at small x in comparison with the NMC result obtained at larger values of x .- electron p: colliding beams
- colliding beams: electron p
- electron p: deep inelastic scattering
- deep inelastic scattering: electron p
- p: structure function
- structure function: small-x
- structure function: slope
- gluon: momentum spectrum
- scaling: violation
- DGLAP equation: solution
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