13–17 Oct 2025
Physics Department, Milan University
Europe/Rome timezone

Vacuum versus medium evolution effects in photon-jet productions

15 Oct 2025, 14:25
25m
Sala Consiglio (Physics Department, Milan University)

Sala Consiglio

Physics Department, Milan University

Via Celoria 16, 20133 Milan (Italy)

Speaker

Martin Rohrmoser (Jan Kochanowski University of Kielce)

Description

Within ultrarelativistic heavy ion collisions the hot and dense medium of a quark gluon plasma (QGP) can be recreated.
While the QGP medium cannot be directly measured, jets, i.e. highly energetic,
collimated, sprays of strongly interacting particles provide a suitable indirect means to access the QGP.
In the medium jets can evolve by the jet-medium interactions of scattering off medium particles as well as by medium induced radiations of jet particles.
In addition it is possible that the color degrees of freedom of jet particles
are not resolved by the medium and appear as color neutral combinations. In these cases emission
of bremsstrahlung as in vacuum, vacuum like emissions (VLEs), can still occur.
I will present a Monte-Carlo algorithm that combines jet evolution via VLEs and jet-medium interactions
considers production and evolution of jet particles via scattering off medium particles and medium
induced emissions. Numerical results were obtained for the productions of photon-jet pairs within heavy ion collisions.
Due to the consideration of VLEs the angular azimuthal correlations between photons and jets show a larger broadening
as compared to the effects from in-medium scattering and medium induced radiations alone.

Authors

Prof. Konrad Tywoniuk (University of Bergen, Bergen, Norway) Krzysztof Kutak (IFJ PAN) Martin Rohrmoser (Jan Kochanowski University of Kielce) Souvik Priyam Adhya (Post doctoral fellow) Wieslaw Jan Placzek

Presentation materials