How well does NLO pQCD describe strangeness in $p+p$ collisions at $\sqrt{s}$= 200 GeV in STAR?

Abstract

We present measurements of the transverse momentum spectra for $\mathrm{K^{0}_{S}}$, $Λ$, $Ξ$ and their antiparticles in p+p collisions at $\sqrt{s}=200 GeV$. The extracted mid-rapidity yields and $<\mathrm{p_{T}}>$ are in agreement with previous $p+\bar{p}$ experiments while they have smaller statistical errors. We compare the measured spectra for $\mathrm{K^{0}_{S}}$ and $Λ$ to the latest available calculations from NLO pQCD and see good agreement for the $\mathrm{K^{0}_{S}}$ above 1.5 GeV/c.