Charged particle spectra as a probe for small x parton dynamics and saturation

by Dr Anastasia Grebenyuk (DESY)

Monday 17 Jun 2013, 14:00 → 15:00 Europe/Brussels

Large seminar room (IIHE (ULB-VUB))

In the high energy limit the parton dynamics are driven by the growth of gluon densities at low momentum fraction (x). At such high parton densities gluon recombination processes become possible which lead to saturation effects. Such effects have been measured experimentally with the cross section of leading tracks as a function of the track transverse momentum in pp collisions. High parton densities on the other hand lead also to special dynamical effects, when the longitudinal momenta of the gluons are of similar size as their transverse momenta. This is studied with a measurement of pt and eta spectra of charged particles in ep collisions at HERA.