Speaker
Description
We report the observation of the existence of a possible universal limit for valence parton distributions that should exist once partonic degrees of freedom are relevant for high energy scattering from strongly interacting bound systems like a nucleon, meson or few nucleon system at very short distances. Our observation is based on the notion that the Bjorken x weighted valence parton distribution function has a peak, that characterizes the average momentum fraction carried out by the valence quarks in the system. Within residual mean-field model of the valence quark distribution we found that
the position of the peak has an universal upper limit.
We demonstrate that the existence of such limit imposes a new constraint on
choosing the starting resolution scale for valence PDFs. We also demonstrate how the existence of this limit can be used to check the onset of quark-clusters in short range nucleon correlations in nuclei.
This work is supported by the US DOE Office of Nuclear Physics Grant DE-FG02-01ER41172.
