PhD (M/F) on Charmonia production in pp and PbPb collisions at LHC in ALICE experiment.

Organisation/Company

CNRS

Department

Laboratoire de physique subatomique et des technologies associées

Research Field

Physics

Researcher Profile

First Stage Researcher (R1)

Country

France

Application Deadline

29 Mar 2024 – 23:59 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

35

Offer Starting Date

1 Oct 2024

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

Ultra-relativistic heavy ion collisions delivered by the CERN Large Hadron Collider (LHC) provides extreme conditions of temperature and density of nuclear matter allowing the study of Quark Gluon Plasma, a deconfined state of quarks and gluons, predicted by Quantum Chormodynamics (QCD).

Quarkonia, pairs of heavy quark and anti-quark, are produced very early during an heavy ion collision. Therefore, there are very useful to understand the initial stages of such collision and characterize the QGP evolution and properties. Indeed, they are very sensitive to the temperature of the medium created during the heavy ion collision. If the temperature is high enough, the charmed quark pairs initially produced will be dissolved in the medium. This phenomena is called quarkonia suppression.

The measurements done at LHC during Run 1 and 2 shed a new light on quarkonia production mechanisms. In particular, the J/$Psi$ suppression is not as high as expected in the most central collisions. Indeed, the massive production of charm quarks at the LHC energies allows these quarks, after interaction in QGP, to form a new quarkonia state. This regeneration mechanism could explain the observed production of charmonia.

However, the constrains that such measurement provides on theoretical models are still limited since the measurements are done on inclusive charmonia production. The Run 3 at LHC allows to separate the charmonia directly produced during the collisions from the ones produced by other particle decays such as B meson. The separation of these two components is necessary to understand the production and interaction with the medium of charmonia. This is possible in Run3 with ALICE thanks to the new Muon Forward Tracker detector that has been installed in the experiment.

The goal of the PhD will be to study the charmonia production in the muon decay channel at forward rapidities using pp and PbPb collision collected during the Run3 ALICE data taking. The candidate will be involved in pp and/or PbPb data analysis on one of the topics of interest currently explored by the group.

The candidate will join the SUBATECH ALICE team (8 permanent physicists, 2 post doc and 2 PhD students. He/she will be involved in the data taking of ALICE experiment, the analysis software developments, and the calibration of the detectors (MFT, Muon spectrometer)

Charmonia production in pp and PbPb collisions at LHC in ALICE experiment.

Requirements

Research Field

Physics

Education Level

PhD or equivalent

Languages

FRENCH

Level

Basic

Research Field

Physics

Years of Research Experience

None

Additional Information
Additional comments

The candidate (M/F) must :
– Have a Master degree in particle physics, hadronic physics or nuclear physics
– Good knowledge in programming (C++ or object oriented language, python)
– Good knowledge in english (writing, speaking)
– Skills in teamwork and communication

Website for additional job details

https://emploi.cnrs.fr/Offres/Doctorant/UMR6457-SOPDEP-046/Default.aspx

Work Location(s)

Number of offers available

1

Company/Institute

Laboratoire de physique subatomique et des technologies associées

Country

France

City

NANTES

Geofield

Where to apply

Website

https://emploi.cnrs.fr/Candidat/Offre/UMR6457-SOPDEP-046/Candidater.aspx

Contact

City

NANTES

Website

http://www-subatech.in2p3.fr

STATUS: EXPIRED