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2017-02 7

3-140

Slight concern about 3-140 Test4 vs Test3 (run 9971 vs run 9968); I note the strong lobe structure. I suspect tracker inefficiency is the cause, rather than beam per se:

  1. beam is narrower in x and more upright
  2. particles with small x tend to have small py (angular momentum effect)
  3. so py is smaller in general; which means that those tracks with low px have lower pt

4-140

Momentum is a bit low, but alpha is reasonably small in tku

Updated by Rogers, Chris over 4 years ago · 6 revisions