Search

The BRAHMS collaboration has measured identified particle spectra from Au+Au collisions at √sNN = 200 GeV. Rapidity densities are deduced from fits to the pion and kaon spectra. dN/dy is plotted as a function of rapidity and 4&pai; yields and ratios are calculated. The signed K/&pai; ratios are compared to values obtained at lower energies. We find that K-/&pai;- increases monotonically from the AGS and SPS regimes, while K+/&pai;+ is similar to what was found at the highest √sNN at SPS. [ABSTRACT FROM AUTHOR]

We present transverse momentum spectra of unidentified charged hadrons at two pseudorapidities (η = 0, 2.2) as well as the first results on identified negatively charged pions at rapidity 2.2 from Au+Au collisions at &√sNN = 200 GeV. The high pT yields of charged hadrons in the most central collisions show a strong suppression when compared to expected binary-scaled yields from nucleon-nucleon collisions or semi-peripheral collisions. The &pai;- spectra at forward rapidity (y = 2.2) also indicate a clear suppression of high pT &pai;- yields in central collisions. [ABSTRACT FROM AUTHOR]