Laboratory: SUBATECH
Address: 4 rue A. Kastler, La Chantrerie, 44307 Nantes cedex 3

Primary supervisor: Jacopo Ghiglieri (theory group)
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Thesis topic:

It is extremely exciting that the quark-gluon plasma, the deconfined phase of Quantum ChromoDynamics-- the theory of the strong interaction-ß- can be probed in the laboratory through heavy-ion collision experiments, such as those at the Large Hadron Collider (LHC) at CERN. The investigation of the medium produced in these experiments proceeds through two complementary approaches: “bulk properties” --collective behavior of the many lower-energy produced particles-- and “hard probes” -- the fewer higher-energy particles.

Jets--collimated sprays of hadrons-- are one of the key hard probes: understanding the difference between jet development in a hot plasma, compared to development in the vacuum or near-vacuum environment of a lower-multiplicity collision (e.g proton-proton) is of the utmost importance for quantifying the properties of the quark-gluon plasma, also in the light of the challenge posed by the recent discovery of collective behavior in “small systems”, i.e. proton-nucleus and high-multiplicity proton-proton collisions, unaccompanied by the modification of jet spectra (“jet quenching”)  observed in heavy-ion collisions.

Motivated by these current challenges and intense activity, the proposed research will investigate the theory jet propagation in a hot quark-gluon plasma, concentrating in particular on the development and application of the most advanced techniques in Thermal Field Theory--the theory of Quantum Fields at nonzero temperature-- and in Effective Field Theories, striving to create a comprehensive theory for the jet evolution through all stages of the collisions.

How to apply: Applicants should submit the following documents through https://theses.u-bretagneloire.fr/3m/copy_of_theses-2019/developpements-theoriques-pour-les-jets

-  Detailed and up-to-date CV, with a valid email address that will remain so until the administrative procedures are over
- Motivation letter with a description of your professional project (Why a Ph.D? What are you planning to do with your career?)
-  Transcript of exams and marks during the bachelor and master
-  Reference letter from the supervisor for the masters’ thesis or equivalent
-  If applicable, reference letters from supervisors for other undergraduate research project (e.g. bachelor thesis, other master research or internship, such as "M1 stage" in France)

A background in theoretical particle physics and quantum field theory is desirable.

Reference letters can also be sent directly by the reference writers to Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.; the applicant should in this case indicate so in the application file. Preference is given to applications submitted by May 8, 2020.