Speaker
Description
The PHENIX experiment discovered a large excess of low-pT direct
photons in Au+Au collisions at 200 GeV compared to reference p+p
collisions, which has been attributed to thermal radiation from the
medium produced in the collisions. At the same time the excess photons
show a large azimuthal anisotropy, expressed as Fourier coefficients
v2 and v3. These surprising results have not
yet been fully described by theoretical models. PHENIX has developed
a new technique to identify conversion photons without assuming the
radius where the conversion happened. This method greatly increases
the avaliable statistics and reduces systematic uncertainties. We
will present the current status of the analysis of low momentum direct photons
converted on the layers of the VTX detector in the 2014 Au+Au dataset,
a major improvement over previously published results.
| Presentation type | Oral |
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