Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

Session

Parallel Session - Jet modifications IV

6 Nov 2019, 14:00

Wanda Reign Wuhan Hotel

Conveners

Parallel Session - Jet modifications IV

• Carlos Salgado (Norfolk State University and Jefferson Lab)

181. Heavy-flavour jet production and correlations with ALICE

Jakub Kvapil for the ALICE Collaboration (University of Birmingham (GB))

06/11/2019, 14:00

Jet modifications and medium response

Oral Presentation

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...

512. Parton modification and medium response studies using EW-boson-tagged jets and hadrons with pp and PbPb collisions at 5.02 TeV with the CMS detector

Ran Bi (Massachusetts Inst. of Technology (US))

06/11/2019, 14:20

Jet modifications and medium response

Oral Presentation

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...

138. Measurements of electroweak boson tagged jet energy loss and modification by ATLAS

Dennis Perepelitsa (University of Colorado Boulder)

06/11/2019, 14:40

Jet modifications and medium response

Oral Presentation

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...

513. Observation of top quark pair production in nucleus-nucleus collisions with the CMS detector

Georgios Krintiras for the CMS Collaboration (The University of Kansas (US))

06/11/2019, 15:00

Jet modifications and medium response

Oral Presentation

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...

448. Deciphering the $z_g$ distribution in ultrarelativistic heavy ion collisions

Paul Caucal (IPhT)

06/11/2019, 15:20

Jet modifications and medium response

Oral Presentation

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...

728. The problem of overlapping formation times: In-medium virtual corrections

Shahin Iqbal (Central China Normal University)

06/11/2019, 15:40

Jet modifications and medium response

Oral Presentation

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...