Energy reconstruction of electromagnetic showers from $\pi^0$ decays with the ICARUS T600 Liquid Argon TPC

Understand

We discuss the ICARUS T600 detector capabilities in electromagnetic shower reconstruction through the analysis of a sample of 212 events, coming from the 2001 Pavia surface test run, of hadronic interactions leading to the production of $\pi^{0}$ mesons.

• Methods of shower energy and shower direction measurements were developed and the invariant mass of the photon pairs was reconstructed.
• The ($\gamma$,$\gamma$) invariant mass was found to be consistent with the value of the $\pi^0$ mass.
• The resolution of the reconstructed $\pi^0$ mass was found to be equal to 27.3%.