# Quark Matter 2017

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

## Analysis status on low-momentum direct-photons in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV at PHENIX

Not scheduled
2h 30m
Hyatt Regency Chicago

#### Hyatt Regency Chicago

151 East Wacker Drive Chicago, Illinois, USA, 60601
Board: J08
Poster

Tomoya Hoshino

### Description

Direct photons in high-energy heavy-ion collisions are a good probe to understand the full space-time evolution of the collision. The PHENIX experiment measured direct photons in p+p, d+Au, and Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV and discovered thermal photons from Au+Au collisions with internal photon conversions. Recently PHENIX has reported thermal photon production with wide centrality bins in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV via external photon conversions. While the number of participants in Cu+Cu collisions are similar to the one in Au+Au peripheral collisions, the collision geometry is very different. Thus a measurement of low-momentum direct-photons in Cu+Cu collisions can provide important constrains on the origin of the observed direct photons. In this poster we report the current analysis status of a measurement of direct virtual-photons in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV.

Collaboration PHENIX Electromagnetic Probes