Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-11-16
Eur.Phys.J.C9:601-609,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, Latex, 6 PS-figures, Regge-exchange neglected, more details concerning the soft Pomeron included, section on the lon
Scientific paper
10.1007/s100529900096
We study inclusive electroproduction on the proton at low $x$ and low $Q^2$ using a soft and a hard Pomeron. The contribution of the soft Pomeron is based on the Stochastic Vacuum Model, in which a nonperturbative dipole-dipole cross section can be calculated by means of a gauge invariant gluon field strength correlator. To model the hard Pomeron exchange we phenomenologically extend the leading order evolution of a power-behaved structure function, $F_2 \propto x^{- \lambda}$, proposed by L\'opez and Yndur\'ain. This extension allows to consider both the case $Q^2 = 0$ and the region of higher $Q^2$ on the basis of the same parametrization. A good simultaneous fit to the data on $F_2$ and on the cross section $\sigma_{\gamma p}$ of real photoproduction is obtained for $\lambda=0.37$. With four parameters we achieve a $\chi^2/\textrm{d.o.f.} = 0.98$ for 222 data points. In addition, we use our model of the inclusive $\gamma^{\ast} p$ interaction to compute the longitudinal structure function $F_L$.
D'Alesio Umberto
Metz Andreas
Pirner Hans-Juergen
No associations
LandOfFree
Soft and Hard Pomeron in the Structure Function of the Proton at Low x and Low Q^2 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 Soft and Hard Pomeron in the Structure Function of the Proton at Low x and Low Q^2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft and Hard Pomeron in the Structure Function of the Proton at Low x and Low Q^2 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-615545