literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

ZEUS results on the measurement and phenomenology of F(2) at low x and low Q**2

Collaboration
Sep, 1998
36 pages
Published in:
  • Eur.Phys.J.C 7 (1999) 609-630
e-Print:
DOI:
Report number:
  • DESY-98-121,
  • ANL-HEP-PR-98-120
Experiments:
View in:
pdfdatasets
reference search384 citations

Citations per year

1998200520122019202501020304050
Abstract:
Measurements of the proton structure function F2F_2 for 0.6<Q2<17GeV20.6 < Q^2 < 17 {GeV}^2 and 1.2×10−5<x<1.9×10−31.2 \times 10^{-5} < x <1.9 \times 10^{-3} from ZEUS 1995 shifted vertex data are presented. From ZEUS F2F_2 data the slopes dF2/dln⁡Q2dF_2/d\ln Q^2 at fixed xx and dln⁡F2/dln⁡(1/x)d\ln F_2/d\ln(1/x) for x<0.01x < 0.01 at fixed Q2Q^2 are derived. For the latter E665 data are also used. The transition region in Q2Q^2 is explored using the simplest non-perturbative models and NLO QCD. The data at very low Q2Q^2 ≤0.65GeV2\leq 0.65 {GeV}^2 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 3×10−5<x<0.73\times 10^{-5} < x < 0.7. Data from NMC and BCDMS constrain the fit at large xx. Assuming the NLO QCD description to be valid down to Q2∼1GeV2Q^2\sim 1 {GeV}^2, it is found that the qqˉq\bar{q} sea distribution is still rising at small xx and the lowest Q2Q^2 values whereas the gluon distribution is strongly suppressed.
Note:
  • 36 pages including 12 figures Report-no: DESY-98-121
  • positron p: colliding beams
  • positron p: deep inelastic scattering
  • p: structure function
  • structure function: slope
  • momentum transfer: low
  • small-x
  • quantum chromodynamics: perturbation theory
  • nonperturbative
  • vector dominance
  • Regge poles
  • 1-25 of 63
  • 1
  • 2
  • 3
  • 25 / page