v(2) and R-AA of non-photonic single electrons: which restriction do the current measurements pose on the production of charm, beauty?

摘要

In relativistic heavy ion collisions, heavy flavor is expected to result predominately from initial hard parton-parton scatterings. Hence, in the absence of later stage effects, the production of heavy flavor in A+A collisions can be viewed as a superposition of N+N collisions. Measurements of v(2) or R-AA of heavy flavor (or their decay electrons) in A+A collisions violate the simple superposition picture and therefore present themselves as probes of the medium formed in such collisions. On the basis of the measured v(2) and R-AA of non-photonic single electrons in A+A collisions at RHIC, we will investigate the interplay between these observables as well as the restrictions they pose for charm and bottom production.