Author/Authors :
Antonelli، نويسنده , , A and Antonelli، نويسنده , , M and Barbiellini، نويسنده , , G and Barone، نويسنده , , M and Bertolucci، نويسنده , , S and Bianco، نويسنده , , S and Bini، نويسنده , , C and Bloise، نويسنده , , C and Bolognesi، نويسنده , , V and Bossi، نويسنده , , F and Campana، نويسنده , , P and Cervelli، نويسنده , , R. Caloi، نويسنده , , R and Cordelli، نويسنده , , M and De Zorzi، نويسنده , , G and Di Cosimo، نويسنده , , G and Di Dome، نويسنده ,
Abstract :
The KLOE detector is designed primarily for the study of direct CP violation in K0 decays. The electromagnetic calorimeter, EmC, is a most demanding element of the detector. Two prototypes of the EmC (one for the barrel and one for the end-cap region) have been built at Frascati and tested at PSI (Switzerland) using beams of electrons, muons and pions of 40 to 290 MeV/c momentum, and at the Frascati LADON facility using photons of 20 to 80 MeV. We observe excellent linearity from 20 to 290 MeV. The energy resolution is σ(E)/E ∼ 4.4% / ”E(GeV) and the time resolution is ∼ 34 ps/”E(GeV). We found little dependence on incidence angle and entry position. We also determined that some πμ identification is possible.
