ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT ttk.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

máj. 30 péntek 10h15,
1111 Bp., Budafoki út 8., BME FIII. magasföldszint 1, szemináriumi szoba

Csanád Máté (ELTE Atomfizikai Tanszék):
Lévy walk of in heavy-ion collisions

The process of Lévy walk, i.e., movement patterns described by heavy-tailed
random walks, plays a role in various phenomena, from chemical and
microbiological systems through marine predators to climate change. Recent
experiments have suggested that this phenomenon also appears in heavy-ion
collisions.
In high-energy collisions of heavy nuclei, the strongly interacting Quark
Gluon Plasma is created, which, similarly to the early Universe, undergoes
a rapid expansion and transition back to hadronic matter. In the subsequent
expanding hadron gas, particles interact until kinetic freeze-out, when
their momenta stop changing, and they freely transition toward the
detectors. Measuring spatial freeze-out distributions is a crucial tool in
understanding the dynamics of the created matter and the interactions among
its constituents.
In this talk, we discuss related experimental findings and their
simulation-based description[1]. Utilising Monte-Carlo simulations, we show
step length distributions indeed lead to Lévy-stable distributions. We
discuss several challenges this poses to the current understanding of
observed particle
distributions in high-energy physics.

[1]: Dániel Kincses, Márton Nagy, Máté Csanád: "Lévy walk of pions in
heavy-ion collisions", Communications Physics 8, 55 (2025)

Minden érdeklődőt szeretettel várunk.
Asbóth János,
 szemináriumi koordinátor