Speaker
Bjoern Schenke
(Brookhaven National Lab)
Description
Diffractive vector meson production in ultra-peripheral p+A and A+A collisions provides insight into the gluon distribution and its fluctuations in protons and heavier nuclei. I will present calculations of coherent and incoherent differential J/Psi cross sections within a dipole model and the Color Glass Condensate effective theory. We compute the energy/rapidity dependence of the fluctuating gluon distributions using small x evolution equations, which leads to clear predictions for the ratio of the coherent to incoherent cross sections. We further present results for J/Psi production in ultra-peripheral d+Au collisions and compare to experimental data from the STAR collaboration.
Primary authors
Bjoern Schenke
(Brookhaven National Lab)
Heikki Mäntysaari
(Brookhaven National Laboratory)
