PoS - Proceedings of Science
Volume 398 - The European Physical Society Conference on High Energy Physics (EPS-HEP2021) - T05: Heavy Ion Physics
Pionic depth of the hadron gas after a heavy ion collision
G. Gómez Fonfría, F.J. Llanes-Estrada*, J. Suárez Sucunza and J.M. Torres-Rincón
Full text: pdf
Pre-published on: February 24, 2022
Published on: May 12, 2022
The final stage of a relativistic heavy-ion collision is a hadron gas. Final-state interactions therein distort the $p_T$ spectrum of particles coming from the phase transition upon cooling the quark-gluon plasma.
Using recent state-of-the-art parameterizations of pion interactions we provide theoretical computations of the pionic depth of the gas: how likely is it that a given pion rescatters in it (we find a high probability around $p_T=0.5$ GeV at midrapidity, corresponding to the formation of the $\rho$ resonance), a comparison of the collision and Bjorken expansion rates, and how many pions make it through without interacting as a function of $p_T$. This is in the range 10-24% and the main result of the contribution.
DOI: https://doi.org/10.22323/1.398.0280
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