Conveners
Parallel Session - Jet modifications IV
- Carlos Salgado (Norfolk State University and Jefferson Lab)
Heavy quarks (charm and beauty) are ideal probes to investigate the properties of the Quark-Gluon Plasma (QGP) produced in ultra-relativistic heavy-ion collisions, being produced in hard-parton scatterings in the collision early stages and experiencing the whole QGP evolution.
Measurements of heavy-flavour jets give a direct access to the initial parton kinematics and can provide constraints...
Photons and Z boson can be used to constrain the kinematics, as well as the flavor, of the recoiling parton, before its interaction with the quark-gluon plasma. While photons are more abundant, they suffer from larger systematic uncertainties, particularly at low $p_\mathrm{T}$, from the background photons from neutral meson decays. Tagging with Z bosons is a complementary way to study...
Measurements of reconstructed jets produced in conjunction with a high-$p_\mathrm{T}$ electroweak boson (photon or Z) offer a discerning way to study the quark gluon plasma (QGP) created in ultrarelativistic nucleus-nucleus collisions. The high-$p_\mathrm{T}$ boson tags the initial energy, direction, and flavor of the opposing parton or partons before they begin to shower and propagate through...
The high energies available at the CERN LHC have opened up the possibility to measure various large-mass elementary particles for the first time in heavy ion collisions. The first observation of top quark pair ($\mathrm{t\bar{t}}$) production is reported using lead-lead collisions recorded in 2018 by the CMS experiment at a nucleon-nucleon center-of-mass energy of...
Within perturbative QCD, we develop a new picture for the parton shower generated by a jet propagating through a dense quark-gluon plasma. In this picture, the vacuum-like parton branchings, as triggered by the parton virtualities, are factorized in time from the medium-induced emissions responsible for the energy loss by the jet. We implement this picture in a Monte Carlo generator that we...
High energy particles traversing through medium primarily
lose energy by showering through hard bremsstrahlung and pair production. These splitting
processes are coherent over large distances in the very high energy limit, leading to suppression
from the Landau-Pomeranchuk-Migdal (LPM) effect. Avoiding soft-emission approximations,
we study the cases where the coherence lengths of two...
