July 30 – August 2, 2001
Kirill
Filimonov, INPC 2001
6
Combinatorial background and rejection
• Dominant sources
of e+e--pairs: p0-Dalitz
decays and g-conversions
m<200 Mev/c2, small opening angle
• Two partially
recognized low mass pairs produce combinatorial background in high mass: need effective rejection
• Most effective
cut: pt>200 MeV/c
Double dE/dx in SIDC1/2