PHENIX results on direct photon production from Au+Au collisions

Jun 1, 2020, 12:00 PM

Oral Presentation Electroweak Probes Parallel


Veronica Canoa Roman


PHENIX measurements of low $p_T$ direct photons in Au+Au collisions at 200
GeV show large yields that have simultaneously a large anisotropies with
respect to the reaction plane, and that scale with the charged multiplicity
to a power of 5/4, independent of  transverse momentum and collision
centrality. Calculations of thermal photon emission fall short in describing
these three features. Furthermore, a recent publication of the STAR
collaboration indicates lower direct photon yields in Au+Au collisions than
observed by PHENIX.  In order to provide new PHENIX has shown first results
from Au+Au data taken in 2014. These data have 10 fold statistics compared
to published results. In this talk we will show the latest direct photon
results from this data set.

Contribution type Contributed Talk
Track Electroweak Probes
Collaboration (if applicable) PHENIX

Primary author

Gabor David (Brookhaven National Laboratory)

Presentation materials