Transverse Momentum Distributions in AuAu and dAu Collisions atsNN=200 GeV

Pion Interferometry in Auau Collisions at √ S Nn =200 Gev

We present preliminary results from a two-pion intensity interferometry analysis from Au+Au collisions at √ s NN =200 GeV measured in the STAR detector at RHIC. The dependence of the apparent pion source on multiplicity and transverse momentum are discussed and compared with preliminary results from d+Au and p+p collisions at the same beam energy.

The charged - hadron / pion ratio at the Relativistic Heavy Ion

The hadron/pion ratio is calculated in 200 GeV AuAu collisions at midrapid-ity, applying pQCD and non-universal transverse-momentum broadening. Arguments are presented for such non-universality, and the idea is implemented in a model, which reproduces the main features of the centrality dependence of the hadron/pion ratio in AuAu collisions. The model also reasonably describes the qualitative d...

High Transverse Momentum Ξ Baryon Correlations in p + p Collisions at √ s = 200 GeV .

High transverse momentum identified particle spectra in 200 GeV collisions from STAR

Significant baryon over meson enhancement was measured at RHIC in the intermediate transverse momentum range of pT = 2−4 GeV/c (”baryonmeson puzzle”). With STAR detector we were able to extend particle identification towards higher transverse momentum offering further insights into the particle production mechanisms at intermediate to high pT . In this paper we present results on charged pion, ...

High Transverse Momentum Ξ Baryon Correlations in p + p Collisions at √ s = 200 GeV . Betty