Proper Time Determination
Proper time t = LB MB/PB
B boost PB = Pjet - Pfrag( + Pmiss )
vtx + kinematics fragmentation
Pmiss : E,P conservation (LEP/SLD)
~ 10 - 20 %
Flight Length LB
~ 0.2-0.3 mm (<LB> ~ 3 mm)
time resolution
~ 0.2 ps ( 70%) + 1. ps (30%)
I vtx
II vtx
B
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