ZEUS results on the measurement and phenomenology of F{sub 2} at low x and low Q{sup 2}.
Measurements of the proton structure function for and from ZEUS 1995 shifted vertex data are presented. From ZEUS data the slopes at fixed x and for at fixed are derived. For the latter, E665 data are also used. The transition region in is explored using the simplest non-perturbative models and NLO QCD. The data at very low are described successfully by a combination of generalised vector meson dominance and Regge theory. From a NLO QCD fit to ZEUS data the gluon density in the proton is extracted in the range . Data from NMC and BCDMS constrain the fit at large x. Assuming the NLO QCD description to be valid down to , it is found that the sea distribution is still rising at small x and the lowest values whereas the gluon distribution is strongly suppressed.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- ER
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 942397
- Report Number(s):
- ANL-HEP-PR-98-120; TRN: US0902825
- Journal Information:
- Eur. Phys. J., Vol. 7, Issue 4 ; Mar. 1999; ISSN 1434-6044
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Measurement of the proton structure function F{sub 2} and the total {gamma}*p cross-section at low Q{sup 2} and low x
Deep inelastic inclusive and dfifractive scattering at Q{sup 2} values from 25 to 320 GeV{sup 2} with the ZEUS forward plug calorimeter.