Kavli Affiliate: David Muller
| First 5 Authors: Dana Avramescu, Vincenzo Greco, Tuomas Lappi, Heikki Mäntysaari, David Müller
| Summary:
We study the phenomenological impact of the pre-equilibrium glasma initial
stage of heavy-ion collisions on heavy quark azimuthal correlations and
spectra. Using our numerical solver, we simulate the transport of heavy quark
test particles in an SU(3) glasma background field. The glasma field equations
are formulated using classical real-time lattice gauge theory, and the heavy
quark dynamics are described by classical transport equations numerically
solved using the colored particle-in-cell method. For the first time, the
effect of the glasma stage on the azimuthal correlations of $coverline{c}$ and
$boverline{b}$ pairs is studied. The resulting azimuthal width
$sigma_{Deltaphi}$ exhibits a large and quick decorrelation due to the
strong glasma fields. Further, we evaluate how the $p_T$-broadening in the
glasma affects heavy quark $p_T$-spectra, which are initialized according to
the FONLL heavy quark production calculation. The nuclear modification factor
$R_{AA}$ is extracted for $c$ and $b$ quarks in the glasma and additional
nuclear PDF effects accounting for gluon shadowing are included.
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