Speaker
Description
Attenuation of hadrons with open or hidden heavy flavor, produced in relativistic heavy ion collisions, is described within the color-dipole approach. A charmonium propagating through a dense matter can be broken-up by either Debye screening of the binding potential (melting), or due to color-exchange interactions with the surrounding medium (absorption). These two effects are found to have similar magnitudes and both vanish at high transverse momenta of the charmonium.
Although hadrons with open heavy flavor, charm and beauty, have been predicted to have a high survival probability, they were found to be strongly suppressed by final state interactions with the created dense medium. While vacuum radiation of high-$p_T$ heavy quarks ceases at a short time scale, production of a heavy flavored hadrons in a dense medium is considerably delayed due to prompt breakup in the medium. This causes a strong suppression of the heavy quark yield in a good accord with available data.
