SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 74: Poster
HK 74.24: Poster
Donnerstag, 23. März 2023, 17:30–19:00, HSZ EG
Collisional broadening in a transport model — Hannah Elfner1,2,3,4, Renan Hirayama1,2, and •Branislav Balinovic2,3 — 1Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI Helmholtzzentrum für Schwerionenforschung, Campus Frankfurt — 2Frankfurt Institute for Advanced Studies (FIAS) — 3Institut für Theoretische Physik, Goethe Universität — 4GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt
In this work, we study the effect of collisional broadening in different hadron species, for both resonances and stable particles, using different temperatures in the hadronic transport approach SMASH (Simulating-Many-Accelerated-Strongly-Interacting-Hadrons). In SMASH the information about the phase space and interactions is available at all times, which makes the lifetimes and mass distributions of particles directly accessible. Our set up simulates a thermalized hadron gas, used to study the absorption of particles in equilibrium. The collisional broadening is measured using effective widths, which are a measure for decay plus absorption probabilities. We also calculate the corresponding dynamical spectral functions, which are interesting from theoretical perspective, since they can be an indicator of chiral symmetry restoration. Moreover, we investigate the impact on collisional broadening of different assumptions for the mass dependence of vacuum decays, finding that a mass-dependent vacuum experiences a stronger collisional broadening than the mass-independent case.