Midrapidity φ production in Au+Au collisions at sNN=130 GeV

Le résumé fourni par la source

We present the first measurement of midrapidity vector meson $\ensuremath{\varphi}$ production in Au+Au collisions at RHIC $(\sqrt{{s}_{\mathrm{NN}}}=130 \mathrm{GeV})$ from the STAR detector. For the 11% highest multiplicity collisions, the slope parameter from an exponential fit to the transverse mass distribution is $T=379\ifmmode\pm\else\textpm\fi{}50(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}45(\mathrm{syst}) \mathrm{MeV},$ the yield $dN/dy=5.73\ifmmode\pm\else\textpm\fi{}0.37(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.69(\mathrm{syst})$ per event, and the ratio ${N}_{\ensuremath{\varphi}}{/N}_{{h}^{\ensuremath{-}}}$ is found to be $0.021\ifmmode\pm\else\textpm\fi{}0.001(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.004(\mathrm{syst}).$ The measured ratio ${N}_{\ensuremath{\varphi}}{/N}_{{h}^{\ensuremath{-}}}$ and T for the $\ensuremath{\varphi}$ meson at midrapidity do not change for the selected multiplicity bins.

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