12-18 August 2012
US/Eastern timezone

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Single electrons from heavy flavor decays in 200 GeV Cu+Cu collisions at PHENIX

16 Aug 2012, 16:00
2h
Regency 1/3 and Ambassador ()

Regency 1/3 and Ambassador

Poster Heavy flavor and quarkonium production Poster Session Reception

Speaker

Nicole Apadula

Description

Since heavy flavor quarks are produced early in the collision, they experience the full evolution of the medium and are thus a good probe of medium effects. Electrons from open heavy flavor have previously been measured for p+p, Au+Au and d+Au collisions at the Relativistic Heavy Ion Collider (RHIC) by PHENIX. In the most central Au+Au the yield is suppressed relative to a Ncoll scaled p+p which suggests that the heavy quarks lose a significant portion of their initial energy in the medium. A similar analysis done in the d+Au collisions suggests that there are cold nuclear matter effects that are masked by the hot, dense medium produced in the Au+Au collisions. New results from Cu+Cu collisions provide an important look at the Ncoll region between the d+Au and Au+Au systems. The Cu+Cu results will be shown for different centralities along with a comparison to the d+Au and Au+Au results. The nuclear modification factor, RAA, will also be shown as a function of Ncoll, giving a more complete picture as the cold nuclear matter effects in d+Au collisions are taken over by the effects of the hot medium in the Au+Au system.

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