High-P_T Physics with Identified Particles

Details High-P_T Physics with Identified Particles High-P_T Physics with Identified Particles

2009-07-27

arxiv.org/abs/0907.4802v2

Nucl.Phys.A830:693c-696c,2009

Physics

Nuclear Physics

Nuclear Theory

Contribution to Quark Matter 2009; 4 pages, 4 figures; v2: small fixes in style due to referee

Scientific paper

10.1016/j.nuclphysa.2009.09.057

The suppression of high-P_T particles in heavy ion collisions was one of the key discoveries at the Relativistic Heavy Ion Collider. This is usually parameterized by the average rate of momentum-transfer squared to this particle, qhat. Here we argue that measurements of identified particles at high P_T can lead to complementary information about the medium. The leading particle of a jet can change its identity through interactions with the medium. Tracing such flavor conversions could allow us to constrain the mean free path. Here we review the basic concepts of flavor conversions and discuss applications to particle ratios and elliptic flow. We make a prediction that strangeness is enhanced at high P_T at RHIC energies while its elliptic flow is suppressed.

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