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Teilchentee WS 2020/21
Seminar at the Institute for Theoretical Physics, Heidelberg University
on Thursdays, 4 pm
Date: 21.01.2021
Speaker: Hannah Elfner (Frankfurt / GSI)
Title: Exploring the QCD phase diagram: Approaching the phase transition from the hadronic side
Abstract
Colliding heavy ions at ultra-relativistic energies offers access to strongly-interacting matter under extreme conditions. At high temperatures and or densities a transition to the quark-gluon plasma is expected, a new state of matter that has been observed at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). At lower beam energies the heavy-ion reactions probe the intermediate temperature and high baryon chemical potential region of the QCD phase diagram, where a first order transition between hadronic and deconfined matter might occur. In this talk, I will present the state-of-the-art for the dynamical description of heavy-ion reactions at lower beam energies and introduce the hadronic transport approach SMASH (Simulating Many Accelerated Strongly-interacting Hadrons). A detailed theoretical description of the whole dynamics is required to connect fundamental QCD input to experimental observables. Deep learning tools might be helpful in extracting new sensitivities to the phase transition in the experimentally accessible information. Besides some recent results on dilepton and photon production from the hadronic stage, I will discuss the transport coefficients of hadronic matter at finite temperatures and densities calculated within the SMASH hadronic transport approach. These provide a low temperature limit for the extraction of transport properties of QCD matter that are one of the main objectives for heavy-ion research besides the structures in the phase diagram.
