Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-02-08
JHEP0704:067,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
references added, figures 2, 7 and 8 updated v3: reference added, some misprints corrected
Scientific paper
10.1088/1126-6708/2007/04/067
DIS data from HERA show a striking regularity as \sigma^{\gamma^* p} is a function of the ratio \tau=Q^2/Q_s^2(x) only. The scaling function shows a break at \tau ~ 1, which has been taken as an indication for saturation. However, besides saturation also the transition between dominance of k_t-ordered (DGLAP) and k_t-non-ordered (BFKL) evolution contributes to a break around this value of \tau, as well as the suppression for small Q^2 due to finite quark masses and confinement. In this paper we use a dipole cascade model based on Mueller's dipole model, which also includes energy conservation and pomeron mergins, to investigate the contributions of these different effects to the scaling behaviour. As a result we predict that the scaling function for \tau < 1 will be modified when data for Q^2 > 1 GeV^2 become available. We also investigate the scaling properties of the charm contribution and the impact parameter dependence of the saturation scale.
Avsar Emil
Gustafson Gösta
No associations
LandOfFree
Geometric Scaling and QCD Dynamics in DIS does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Geometric Scaling and QCD Dynamics in DIS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geometric Scaling and QCD Dynamics in DIS will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-432767