Measurement of neutral mesons in p+p collisions at s=200 GeV and scaling properties of hadron production

Le résumé fourni par la source

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the invariant differential cross section for production of ${K}_{S}^{0}$, $\ensuremath{\omega}$, ${\ensuremath{\eta}}^{\ensuremath{'}}$, and $\ensuremath{\phi}$ mesons in $p+p$ collisions at $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$. Measurements of $\ensuremath{\omega}$ and $\ensuremath{\phi}$ production in different decay channels give consistent results. New results for the $\ensuremath{\omega}$ are in agreement with previously published data and extend the measured ${p}_{T}$ coverage. The spectral shapes of all hadron transverse momentum distributions measured by PHENIX are well described by a Tsallis distribution functional form with only two parameters, $n$ and $T$, determining the high-${p}_{T}$ and characterizing the low-${p}_{T}$ regions of the spectra, respectively. The values of these parameters are very similar for all analyzed meson spectra, but with a lower parameter $T$ extracted for protons. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.

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