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'Smashing more than two': Deuteron production in relativistic heavy ion collisions via stochastic multi-particle reactions
- Source :
- Phys. Rev. C 104, 034908 (2021)
- Publication Year :
- 2021
-
Abstract
- We study the deuteron production via the deuteron pion and nucleon catalysis reactions, $\pi p n \leftrightarrow \pi d$ and $N p n \leftrightarrow N d$, by employing stochastic multi-particle reactions in the hadronic transport approach SMASH for the first time. This is an improvement compared to previous studies, which introduced an artificial fake resonance $d'$ to simulate these $3 \leftrightarrow 2$ reactions as a chain of $2\leftrightarrow 2$ reactions. The derivation of the stochastic criterion for multi-particle reactions is presented in a comprehensive fashion and its implementation is tested against an analytic expression for the scattering rate and the equilibrating particle yields in box calculations. We then study Au + Au collisions at $\sqrt{s_{\mathrm{NN}}} = 7.7$ GeV, where we find that multi-particle collisions substantially reduce the time required for deuterons to reach partial chemical equilibrium with nucleons. Subsequently, the final yield of $d$ is practically independent from the number of $d$ at particlization, confirming the results of previous studies. The mean transverse momentum and the integrated elliptic flow as a function of centrality are rather insensitive to the exact realization of the $2\leftrightarrow 3$ reactions.<br />Comment: 14 pages, 10 figures; included text files with the data to reproduce the figures; replaced with published version; additional appendix about grid setup
- Subjects :
- High Energy Physics - Phenomenology
Nuclear Theory
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. C 104, 034908 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2106.14287
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevC.104.034908