Speaker
Marzia Rosati
(Iowa State University)
Description
Direct photon single spin asymmetries, $A_N$, have the advantage that they
are not sensitive to final state effects and that the hard scattering
process is predominantly quark-gluon scattering at RHIC energies.
Therefore, direct photons provide a clean probe to study the quark-gluon
and tri-gluon correlations in single spin asymmetries with particularly
the latter hardly constrained at present. The larger and more hermetic
acceptance of sPHENIX compared to PHENIX is expected to improve the
precision of the previous direct photon AN measurements using the 2024
polarized proton-proton collisions that were recorded in sPHENIX.
The status of the direct photon $A_N$ measurements will be presented.
Primary author
Marzia Rosati
(Iowa State University)
