Strangeness production at RHIC in the perturbative regime

Abstract

Abstract. We investigate strange quark production in Au-Au collisions at RHIC in the framework of the Parton Cascade Model(PCM). The yields of (anti-) strange quarks for three production scenarios -primary-primary scattering, full scattering, and full production -are compared to a proton-proton baseline. Enhancement of strange quark yields in central Au-Au collisions compared to scaled p-p collisions increases with the number of secondary interactions. The centrality dependence of strangeness production for the three production scenarios is studied as well. For all production mechanisms, the strangeness yield increases with (N part ) 4/3 . The perturbative QCD regime described by the PCM is able to account for up to 50% of the observed strangeness at RHIC.

Transport dynamics of parton interactions in pp collisions at energies available at the CERN Large Hadron Collider

“…For the corresponding results at √ s =0.2 TeV, the reader is referred to Ref. [20,[25][26][27][28]. Our calculations do not consider hadronization and subsequent interactions among the hadrons.…”

What do we learn from strangeness at RHIC?

“…This limitation is largely due to the momentum cut-off in leading order pQCD calculation for binary cross sections in the PCM, which prohibits soft non-perturbative scatterings, which should produce a significant amount of strangeness in the later thermalized QGP phase of the reaction. A more detailed investigation of strangeness production in the perturbative regime can be found in Chang's article in these proceedings [26] and in [27].…”