Heavy Quark Dynamics in Heavy Ion Reactions
J. L. Nagle
Abstract
Collisions between heavy nuclei at the Relativistic Heavy Ion Collider liberate from the nuclear wavefunction of order 10,000 gluons, quarks and antiquarks. The system is dominated by gluons and up and down (anti) quarks. Heavy quarks, though having little effect on the overall equation of state, are critical as probes of the surrounding medium. We compare predictions from a scenario where the charm quarks escape the medium unaffected and fragment into hadrons in vacuum, and one where the charm quarks are swallowed up by the medium and reflect the overall system hydrodynamics.
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