SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Heavy-Ion Collisions and QCD Phases I

HK 5.4: Talk

Monday, March 20, 2023, 17:15–17:30, SCH/A216

Equation of motion of the shear stress tensor in the moment approximation — •Timo Füle — FIAS, Frankfurt am Main, Germany

One of the most prominent theories for the evolution of the hot quark gluon plasma is kinetic theory. The common equations of motion (EOM) by Israel and Stewart lack a method for consistently increasing accuracy, namely a power counting scheme. This is due to a truncation of the expansion of the distribution function before deriving the EOM. But in fact the equations of motion can be derived without closing the expansion leaving infinitely many moments of the Boltzmann equation and being able to decide on the order of the approximation afterwards. This work revises the EOM derived by Denicol et al. at the example of the shear stress tensor. The truncation will be done afterwards to arrive at the EOM of the 14-moment approximation with the incorporated power counting scheme in the Knudsen- and inverse Reynolds-number.