Ruprecht Karls Universität Heidelberg
GSI

ALICE

ISOQUANT

Phenomenology

High energy nuclear collisions enable physicists to probe fundamental aspects of Quantum Chromodynamics (QCD), which describes the strong interaction between fundamental particles. Although the hot QCD matter, which is produced in the particle collision, cannot be directly accessed by experiment, the distributions of emitted particles can be measured and conclusions about the underlying physical structure can be inferred.

Phenomenology links theory and experiment by describing and predicting experimental data using theoretical models. For heavy-ion collisions, a relativistic fluid-dynamic description of the evolution of the hot QCD medium consisting of (almost) independent quarks and gluons, the quark-qluon plasma (short QGP), has shown great success in describing experimental data.

Within the two projects A02 and C06 of the ISOQUANT collaboration, the research of our group focuses on the applicability of relativistic hydrodynamics with mode-expansion to the process of heavy-ion collisions. In particular, we try to understand properties of the QGP, which can be inferred from systematic studies of data-to-model fits of theoretical predictions to high-precision measurements from the ALICE collaboration.
One of the main objectives of our group is the study of transport coefficients (e.g. viscosities) and initial conditions, which provide meaningful insights to the underlying physical processes of a heavy-ion collision.
We pursue the extension of the fluid-dynamic description to more observables (such as particle spectra or flow-coefficients) to establish a consistent phenomenology description of the QGP.

Tools for the Analysis

Besides a wide field of expertise from theorists and experimentalists, our group uses a recently developed code package called FluiduM (written in Mathematica) to reproduce experimental data.
We use Python and ROOT (C++) for the data analysis, focussing on algorithmic approaches and grid-search methods.

Contact Persons in the Group

Federica Capellino (PhD student)

Contact at GSI: Ilya Selyuzhenkov, Andrea Dubla

Webmaster:
EDV Abteilung