User name A. Deur
Log entry time 11:09:38 on August26,2003
Entry number 113603
This entry is a followup to: 113590
The peak at large y_t is also visible for He3 cell runs, see fig 1 (it is in log scale) where it appears as a small shoulder. During beam study, we had a look at the collimators or anything that could be in the beam path and we did not see anything wrong, see Jian-Ping entry.
The contamination from the empty ref cell is very small anyway: 0.4% after online replay cuts.