User name Ulmer
Log entry time 14:50:28 on June27,2000
Entry number 45000
keyword=tc_cor and low multiplicity
The sharp spikes in the hadron X_TRA spectrum correspond to multiplicity=2 in the various wire planes. The resulting incorrect track also affects tc_cor since the correction for path length/velocity requires tracking. The figure below shows tc_cor without and with a cut requiring multiplicities > 3 in each of the four wire planes.
The secondary distribution is also nearly eliminated when the mult. cut is for >2.