Production of π0 and η mesons in U+U collisions at sNN=192 GeV

Le résumé fourni par la source

The PHENIX experiment at the Relativistic Heavy Ion Collider measured ${\ensuremath{\pi}}^{0}$ and $\ensuremath{\eta}$ mesons at midrapidity in $\mathrm{U}+\mathrm{U}$ collisions at $\sqrt{{s}_{{}_{NN}}}=192$ GeV in a wide transverse momentum range. Measurements were performed in the ${\ensuremath{\pi}}^{0}(\ensuremath{\eta})\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}$ decay modes. A strong suppression of ${\ensuremath{\pi}}^{0}$ and $\ensuremath{\eta}$ meson production at high transverse momentum was observed in central $\mathrm{U}+\mathrm{U}$ collisions relative to binary scaled $p+p$ results. Yields of ${\ensuremath{\pi}}^{0}$ and $\ensuremath{\eta}$ mesons measured in $\mathrm{U}+\mathrm{U}$ collisions show similar suppression pattern to those measured in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{{}_{NN}}}=200$ GeV for similar numbers of participant nucleons. The $\ensuremath{\eta}/{\ensuremath{\pi}}^{0}$ ratios do not show dependence on centrality or transverse momentum and are consistent with previously measured values in hadron-hadron, hadron-nucleus, nucleus-nucleus, and ${e}^{+}{e}^{\ensuremath{-}}$ collisions.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.