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An event generator for hard probes of the preequilibrium stages of ion collisions at the LHC


Thesis topic details

General information

Organisation

The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.

Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.

The CEA is established in ten centers spread throughout France
  

Reference

SL-DRF-27-0316  

Direction

DRF

Thesis topic details

Category

Corpuscular physics and outer space

Thesis topics

An event generator for hard probes of the preequilibrium stages of ion collisions at the LHC

Contract

Thèse

Job description

At the Large Hadron Collider (LHC) at Geneva, collisions of nuclei are used to create a thermodynamic system described by fluid dynamics under extreme conditions of temperature and energy density. The temperature of the short-lived system is sufficiently high in order to release the building blocks of matter at a subnucleonic scale, quarks and gluons. This state of matter is commonly called Quark Gluon Plasma (QGP). The space-time evolution of heavy-ion and light-ion collisions at the LHC is described by close-to-ideal hydrodynamics after a short pre-equilibrium lapse of time. However, key features of the early stages of these collisions are largely unknown. These characteristics are crucial to understand the applicability limits of hydrodynamics as well as the thermalization process of a strongly interacting system.
In recent publications, it was pointed out that the dilepton production in the intermediate mass scale between 1.5 and 5 GeV/c² is highly sensitive to the ´thermalization´ time scale towards the equilibrium QGP.
This thesis is dedicated to the development of an event generator based on state-of-the-art theoretical calculations for the production of charm quarks from the preequilibrium in hadronic collisions at the LHC. The generator will allow to generate simulations adapted for the usage in the LHC experiment and to simulate the preequilibrium signal within general purpose event generators. Machine learning methods will be used for the tool optimisation.

University / doctoral school

PHENIICS (PHENIICS)
Paris-Saclay

Thesis topic location

Site

Saclay

Requester

Position start date

01/10/2027

Person to be contacted by the applicant

Winn Michael michael.winn@cea.fr
CEA
DRF/IRFU
CEA Saclay
Irfu/SPhN
Bât. 703
91191 Gif-sur-Yvette CEDEX
+33 1 69 08 55 86

Tutor / Responsible thesis director

Winn Michael michael.winn@cea.fr
CEA
DRF/IRFU
CEA Saclay
Irfu/SPhN
Bât. 703
91191 Gif-sur-Yvette CEDEX
+33 1 69 08 55 86

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