316,272 research outputs found
Overview on jet results from STAR
Full jet reconstruction allows access to the parton kinematics over a large
energy domain and can be used to constrain the mechanisms of energy loss in
heavy-ion collisions. Such measurements are challenging at RHIC, due to the
high-multiplicity environments created in heavy-ion collisions. In these
proceedings, we report an overview of the results on full jet reconstruction
obtained by the STAR experiment. Jet measurements in 200 GeV p+p show that jets
are calibrated pQCD probes and provide a baseline for jet measurements in Au+Au
collisions. Inclusive differential jet production cross sections and ratios are
reported for central 200 GeV Au+Au collisions and compared to p+p. We also
present measurements of fully reconstructed di-jets at mid-rapidity, and
compare spectra and fragmentation functions in p+p and central Au+Au
collisions.Comment: Proceedings for the 26th WWND conferenc
Non Identical strange particle correlations in Au-Au collisions at 200 GeV from the STAR experiment
Information about the space-time evolution of colliding nuclei can be
extracted correlating particles emitted from nuclear collisions. The high
density of particles produced in the STAR experiment allows the measurement of
non-identical strange particle correlations. Due to the absence of Coulomb
interaction, and systems are more sensitive to
the source size than pairs. Strong interaction potential has been studied
using , and for the first time, pairs. The
experimental correlation functions have been described in the frame of a model
based on the interaction. The first preliminary measurement of -
correlations has been performed, allowing to extract information about
the freeze-out time and the space-time asymmetries in particle emission closely
related to the transverse radial expansion and decay of resonances.Comment: 3 pages, 3 figures, contribution to proceedings of the Second Warsaw
Meeting on Particle Correlations and Resonances in Heavy Ion Collisions,
Warsaw 15-18 Oct 2003, to be published in Nucleonic
Search for Conical Emission with Three-Particle Correlations
We present preliminary STAR results on 3-particle azimuthal angle correlation
studies in Au+Au collisions at = 200 GeV. The studies are
carried out at mid-rapidity between a trigger particle with 3 4 GeV/c and two associated particles in 1 2 GeV/c. A
cumulant analysis reveals finite 3-particle azimuthal correlations, dominated
by near and away side particle correlations consistent with jet production, and
jet-flow correlations. We use a two-component model to remove underlying
background correlations. This analysis indicates the presence of the conical
emission signals in central Au+Au collisions within the model assumptions about
background composition and normalization.Comment: Proceedings for STAR talk presented at Quark Matter 2006, 4 pages 2
figures, Version 2: typos corrected, references adde
- …