The KLOE Electromagnetic Calorimeter

M. Adinolfi, F. Ambrosino, A. Antonelli, M. Antonelli, F. Anulli, G. Barbiellini, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, V. Bocci, F. Bossi (+84 others)
The KLOE detector was designed primarily for the study of CP violation in neutral kaon decays at DAPHNE, the Frascati phi-factory. The detector consists of a tracker and an electromagnetic calorimeter. A lead-scintillating-fiber sampling calorimeter satisfies best the requirements of the experiment, providing adequate energy resolution and superior timing accuracy. We describe in the following the construction of the calorimeter, its calibration and how the calorimeter information is used to
more » ... ation is used to obtain energy, point of entry and time of arrival of photons, electrons and charged particles.With e+ e - collision data at DAPHNE for an integrated luminosity of some 2 pb-1 we find for electromagnetic showers, an energy resolution of 5.7%/sqrtE (GeV) and a time resolution of 54/sqrt(GeV) ps. We also present a measurement of efficiency for low energy photons.
doi:10.15161/ fatcat:3wa7rvrtcndsppx4duwxbxvyui