# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## A detailed study of open heavy flavor production, enhancement, and suppression at RHIC

16 Aug 2012, 16:00
2h

Poster Heavy flavor and quarkonium production

### Speaker

J. Matthew Durham (Los Alamos National Laboratory)

### Description

The flexibility of the beam species available at the Relativistic Heavy Ion Collider has enabled the PHENIX Collaboration to examine open heavy flavor production across a wide range of temperature, energy density, and system size. Charm and bottom production in $p+p$ collisions, which is dominated by gluon fusion, is largely consistent with FONLL pQCD calculations. New analysis techniques have extended the momentum coverage and provide constraints on the bottom cross section. Measurements in $d+$Au collisions exhibit a strong cold nuclear matter Cronin enhancement of electrons from $D-$mesons, which is roughly consistent with the mass-ordering observed for the lighter $\pi, K,$ and $p$ families. This also shows that the nuclear baseline for interpreting Au+Au data could be significantly modified from the $p+p$ shape. Collisions of Cu nuclei provide a crucial intermediary testing ground between the small $d$+Au collision system and the large Au+Au system, and show how the cold nuclear matter enhancement is overtaken by competing hot nuclear matter suppression as the system size increases towards the most central Au+Au collisions. The status of finalizing these results results and others will be discussed, in the context of recent measurements at RHIC and the LHC.

### Primary author

J. Matthew Durham (Los Alamos National Laboratory)

 Poster