Identified charged particle production in Au+Au interactions at STAR-RHIC

The study of the production of charged particles at high transverse momenta plays an important role in the understanding of the interaction mechanism of high-Et jets with the dense nuclear matter. A prototype of a RICH (Ring Imaging Cherenkov) detector developed in the framework of the CERN-ALICE experiment has been fully integrated in the STAR experiment at RHIC (BNL). It allows identification of primary charged particles (namely π, K and p) extending the region of acceptance of the experiment to medium-high transverse momenta (pt<2.5 GeV/c for π and K, pt<5 GeV/c for protons). Methods of pattern recognition and identification of charged particles using the RICH will be presented. Preliminary results on identified charged particle ratios at midrapidity and 1.5

Keywords:

• Particle physics
• Cherenkov radiation
• Detector
• Proton
• Nuclear matter
• Atomic physics
• Physics
• Charged particle
• Transverse plane
• Nuclear physics

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