Difference between revisions of "20200831 sdobbs PID notes"

Revision as of 23:10, 31 August 2020

Here are some suggestions / thoughts from the current studies

Mahmoud
- FCAL photon delta T resolution in data and MC is close, could be tuned a little more
  - tail to negative delta T in data not modeled in MC. would be interesting to understand this more
  - possible change to default cuts - increase to +- 2.0 ns. looks like this should be fine for all-neutral final states. maybe not for those with charged particles?
- BCAL photon delta T has shower energy dependence not modeled in MC - cuts are really loose, so this doesn't matter (yet)
- missing mass resolution slightly different in data and MC. due to photon energy or proton momentum resolution (previous studies suggest the latter is the problem)
Colin
- 1% differences in pi+ BCAL delta t, pi- TOF delta t - driven by low momentum particles?
- 4% difference in proton TOF delta t - at low momentum, a delta T cut of +-0.6 ns is clearly too tight, maybe +-1.0, 1.5 ns at the lowest bin?
  - maybe mostly affects baryon analyses?
- Need more 1D slice plots
Foda
- 1% differences in pi+/pi- TOF delta t - also low momentum?
- Need more 1D slice plots

@@ Line 8: / Line 8: @@
 ** missing mass resolution slightly different in data and MC.  due to photon energy or proton momentum resolution (previous studies suggest the latter is the problem)
 * '''Colin'''
-** 1% differences in pi+ BCAL delta t, pi- TOF delta
+** 1% differences in pi+ BCAL delta t, pi- TOF delta t - driven by low momentum particles?
 ** 4% difference in proton TOF delta t - at low momentum, a delta T cut of +-0.6 ns is clearly too tight, maybe +-1.0, 1.5 ns at the lowest bin?
 *** maybe mostly affects baryon analyses?
 ** Need more 1D slice plots
 * '''Foda'''
-**
+** 1% differences in pi+/pi- TOF delta t - also low momentum?
+** Need more 1D slice plots