Identification of High p⊥\rm p_{\perp} Particles with the STAR-RICH Detector

The STAR-RICH detector extends the particle identification capapbilities of the STAR experiment for charged hadrons at mid-rapidity. This detector represents the first use of a proximity-focusing CsI-based RICH detector in a collider experiment. It provides identification of pions and kaons up to 3 GeV/c and protons up to 5 GeV/c. The characteristics and performance of the device in the inaugural RHIC run are described.Comment: 6 pages, 6 figure

Azimuthal anisotropy in Au+Au collisions at sqrtsNN = 200 GeV

The results from the STAR Collaboration on directed flow (v_1), elliptic flow (v_2), and the fourth harmonic (v_4) in the anisotropic azimuthal distribution of particles from Au+Au collisions at sqrtsNN = 200 GeV are summarized and compared with results from other experiments and theoretical models. Results for identified particles are presented and fit with a Blast Wave model. Different anisotropic flow analysis methods are compared and nonflow effects are extracted from the data. For v_2, scaling with the number of constituent quarks and parton coalescence is discussed. For v_4, scaling with v_2^2 and quark coalescence is discussed.Comment: 26 pages. As accepted by Phys. Rev. C. Text rearranged, figures modified, but data the same. However, in Fig. 35 the hydro calculations are corrected in this version. The data tables are available at http://www.star.bnl.gov/central/publications/ by searching for "flow" and then this pape

Azimuthal anisotropy of charged and identified high pT hadrons in Au+Au collisions at RHIC

We report new results on v{sub 2}(p{sub T}) for Au+Au collisions at {radical}(S{sub NN}) = 200 GeV for charged hadrons, pions, kaons,(anti)protons, K{sub s}{sup 0}, and Lambda. The analysis is extended to p{sub T} = 12 GeV/c for charged hadrons and p{sub T} = 4 GeV/c for identified particles. A comparison of the azimuthal anisotropy of charged hadrons measured at sqrt {radical}(s{sub NN}) = 130 and 200 GeV is presented. The p{sub T}-dependence of baryon versus meson elliptic flow is discussed