Conveners
Parallel Session - Initial state I
- In Kwon Yoo (Pusan National University (KR))
Anisotropic flow provides valuable information on the key properties and the evolution of the matter created in heavy-ion collisions. In this talk, we present the elliptic and triangular flow of inclusive and identified particles measured in Xe-Xe collisions at $\sqrt{s_{\rm NN}} = 5.44$ TeV recorded by the ALICE detector. The measurements are reported for a wide range of particle transverse...
Nuclear parton distribution functions (nPDFs) of quarks and antiquarks affect the production of electroweak bosons in proton-lead (pPb) collisions. In this presentation, the measurements of the neutral Drell-Yan (DY) process and of the W bosons are presented in pPb collision at the center of mass energy of 8.16 TeV with the CMS detector. The rapidity dependence of these processes is...
We present a formulation of the initial state of heavy ion collisions that generalizes the 2+1D boost invariant IP-Glasma [1] to 3+1D through JIMWLK rapidity evolution of the pre-collision Wilson lines. The rapidity dependence introduced by the JIMWLK evolution means that 1) the system no longer trivially satisfies Gauss’ law at the initial time and 2) the form of the 2+1D initial gauge fields...
Previous measurements in small systems indicate that the modifications to jets relative to p+p collisions is small. However, looking at more differential measurements may reveal if any modifications do exist. In particular, we compare $\pi^0$-hadron correlations measured with PHENIX in small systems to those observed in p+p collisions to probe any initial state effects. Several systematic...
We study the heavy-quark momentum diffusion coefficient in far from equilibrium gluon plasma in a self-similar regime using real-time lattice techniques. We use 3 methods for the extraction: an unequal time electric field 2-point correlator integrated over the time difference, hard loop (HTL) perturbation theory and a kinetic theory formula, both using our recently acquired data on the gluon...
Based on Refs. [1] and [2], we discuss the new constraints on gluon parton distribution function (PDF) in lead nucleus, derivable with the Hessian PDF reweighting method from the 5.02 TeV p+Pb measurements of CMS dijet [3] and LHCb $D^0$-meson [4] nuclear modification ratios. The impact is found to be significant, placing stringent constraints in the mid- and previously unconstrained small-$x$...
Equilibration of highly excited baryon-rich matter is studied within the
microscopic model calculations in A+A collisions at energies of BES, FAIR
and NICA. It is shown that the system evolution from the very beginning
of the collision can be approximated by relativistic hydrodynamics, although
the hot and dense nuclear matter is not in local equilibrium yet.
During the evolution of the...
