MONITORING AND CALIBRATION OF THE BELLE ELECTROMAGNETIC CALORIMETER

The Belle detector' is working at the interaction point of the KEKB e+ecollider2 to detect B meson decay products to study CP violating phenomena. In order to cover various topics related to B decays, high resolution electromagnetic calorimetry is indispensable to reconstruct neutral particles such as y, T O , q and so on. Also the electromagnetic calorimeter plays an important role in electron identification3. In this report, we describe monitoring and calibration issues to achieve good performance to match physics requirements.