Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5494211 | Nuclear Physics A | 2016 | 4 Pages |
Abstract
Since soft photons are unmodified once produced in heavy ion collisions, they give information about the entire thermal evolution of the medium. Excess photon yield over the expectation from initial hard scattering has been measured by PHENIX. In addition, PHENIX has measured a large azimuthal anisotropy, v2, of these soft photons with respect to the reaction plane. The large yield and v2 have been difficult to describe quantitatively and raise important questions about the early time dynamics in the medium. It is thus important to make more differential measurements to distinguish various potential explanations for this thermal photon puzzle. In this proceedings, we present yields, v2, and v3 of direct photons from sNN=200Â GeVÂ Au+Au collisions.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Richard Petti, PHENIX Collaboration PHENIX Collaboration,