Speaker
Description
Chamonium has recently attracted attention as a hard probe for imprints of the glasma, a non-equilibrium state of strong gluon fields forming in the early stage of a relativistic heavy-ion collision.
In this work, we investigate color randomization of the $c\bar{c}$ system induced by the glasma environment, focusing particularly on singlet-to-octet transition processes. The resulting octet state is expected to dissociate in the medium, which may affect the final charmonium yield observed in experiments.
In this talk, we first derive the evolution equation for the charmonium density matrix under the glasma. We then apply a singlet-octet projection approximation and solve the equation semi-analytically. Finally, we present results showing on what timescale and to what extent these transitions are induced by the glasma.