Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-08-04
Phys.Lett.B643:273-278,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 4 figures. Version to be published in Physics Letters B
Scientific paper
10.1016/j.physletb.2006.10.068
One of the frontiers of QCD which are intensely investigated in high energy experiments is the high energy (small $x$) regime, where we expect to observe the non-linear behavior of the theory. In this regime, the growth of the parton distribution should saturate, forming a Color Glass Condensate (CGC). In fact, signals of parton saturation have already been observed both in $ep$ deep inelastic scattering at HERA and in deuteron-gold collisions at RHIC. Currently, the description of the experimental data of these experiments is possible considering different phenomenological saturation models for the two processes within the CGC formalism. In this letter we analyze the universality of these dipole cross section parameterizations and verify that they are not able to describe the HERA and RHIC data simultaneously. We analyze possible improvements in the parameterizations and propose a new parametrization for the forward dipole amplitude which allows us to describe quite well the small-$x$ $ep$ HERA data on $F_2$ structure function as well as the $dAu$ RHIC data on charged hadron spectra. It is an important signature of the universality of the saturation physics.
Goncalves Victor P.
Kugeratski M. S.
Machado Magno V. T.
Navarra Fernando S.
No associations
LandOfFree
Saturation physics at HERA and RHIC: An unified description 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 Saturation physics at HERA and RHIC: An unified description, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Saturation physics at HERA and RHIC: An unified description will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-49128