sPHENIX EMCal Energy Scale Stability During RHIC Run-24

sPHENIX is a new experiment at the Relativistic Heavy-Ion Collider (RHIC) that uses its Electromagnetic Calorimeter (EMCal) for measuring energy deposits from a variety of particles, including photons from neutral pion decays. sPHENIX began taking data with p+p collisions at √s = 200 GeV in RHIC Run-24. These p+p collisions provide controlled results against which the Quark-Gluon Plasma properties of future Au+Au collisions will be benchmarked. These p+p collisions also allow for a data driven calibration of the EMCal through reconstruction of the pi0 or eta meson invariant mass, using measured cluster energies and kinematics. This poster will review the pi0 and eta meson reconstructed mass and resolution performance over the course of the run as a way of monitoring the effects of accumulating radiation damage from backgrounds, and changing RHIC machine conditions such as the beam crossing angle and beam spot size.