Presentation Type
Poster Presentation
Symposium Date
Spring 2012
Abstract
The default energy calibration of the STAR EEMC (Endcap ElectroMagnetic Calorimeter) uses the energy deposition of minimally ionizing particles (MIPs). An alternate method is to use pi-0's. We are reporting a preliminary proof-of-principle calibration method using pi-0's. This method reconstructs the invariant mass of photon pairs, assumed to be resulting from pi-0 decays, using standard two-body kinematics. When many photon pairs are analyzed, a peak is expected in the resulting invariant mass distribution near the pi-0 mass. Using the measured mass of this peak, and the known mass of the pi-0, a minimization routine adjusts the detector gains to optimize the invariant mass peak of the pi-0. Initial tests suggest that this method is promising.
Recommended Citation
Barber, Benjamin, "Calibrating the STAR Endcap ElectroMagnetic Calorimeter Using Pi-O’s" (2012). Symposium on Undergraduate Research and Creative Expression (SOURCE). 125.
https://scholar.valpo.edu/cus/125
Biographical Information about Author(s)
Link is to abstract only.