Directed and elliptic flow of charged particles in Cu + Cu collisions at sNN=22.4 GeV

Le résumé fourni par la source

This paper reports results for directed flow ${v}_{1}$ and elliptic flow ${v}_{2}$ of charged particles in Cu $+$ Cu collisions at $\sqrt{{s}_{NN}}=22.4$ GeV at the Relativistic Heavy Ion Collider. The measurements are for the 0--60$%$ most central collisions, using charged particles observed in the STAR detector. Our measurements extend to 22.4-GeV Cu $+$ Cu collisions the prior observation that ${v}_{1}$ is independent of the system size at 62.4 and 200 GeV and also extend the scaling of ${v}_{1}$ with $\ensuremath{\eta}/{y}_{\mathrm{beam}}$ to this system. The measured ${v}_{2}({p}_{T})$ in Cu $+$ Cu collisions is similar for $\sqrt{{s}_{NN}}$ throughout the range 22.4 to 200 GeV. We also report a comparison with results from transport model (ultrarelativistic quantum molecular dynamics and multiphase transport model) calculations. The model results do not agree quantitatively with the measured ${v}_{1}(\ensuremath{\eta}),\phantom{\rule{0.16em}{0ex}}{v}_{2}({p}_{T})$, and ${v}_{2}(\ensuremath{\eta})$.

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