# Quark Matter 2017

5-11 February 2017
Hyatt Regency Chicago
America/Chicago timezone

## Distance of Closest Approach and Unfolding Study to Infer Bottom and Charm Quark Production in p+p Collisions at $sqrt{s}$ = 200 GeV in the PHENIX experiment

Not scheduled
2h 30m
Hyatt Regency Chicago

#### Hyatt Regency Chicago

151 East Wacker Drive Chicago, Illinois, USA, 60601
Board: A14
Poster

### Speaker

Timothy Rinn (Iowa State University)

### Description

Heavy quarks, such as bottom and charm, are primarily produced during
the initial collision. In heavy ion collisions they experience the full
evolution of the hot medium formed. As such they are valuable probes of
the properties of the quark gluon plasma (QGP). The PHENIX Collaboration
has previously published results in Au+Au collisions at $\sqrt{s}$ =200
GeV using the PHENIX silicon vertex detector that indicated a different
energy loss pattern for bottom and charm quarks. To more accurately
measure this effect and produce a well-understood $R_{AA}$, a similar
analysis is being done in the 2015 p+p collision data set at $\sqrt{s}$
=200 GeV. The analysis uses Bayesian unfolding techniques applied
simultaneously to the heavy flavor electron yield and the distance of
closest approach for heavy flavor electrons in order to provide
separated charm and bottom invariant yields.
This poster will present the distance of closest approach measurements
for electrons from heavy flavor decays, their use in the unfolding
procedure, and the status of the analysis.

Collaboration PHENIX Open Heavy Flavors

### Primary author

Timothy Rinn (Iowa State University)