All plots are done using pi+, pi- PID cut and opening angle between pi+pi- to
be greater than 5 degree.
One can see a clear improvement in missing mass resolution when incoming pion momentum is taken from the reconstruction (blue line)(red line- only one fixed value of pi- momentum of 656 MeV is used).
From a fit to the missing mass spectrum Total number of pi+pi- events (after background -pol3-subtraction) amounts to 460 k
Mean value of the missing peak is 0.907, corresponding to the neutron mass of 952 MeV (16 MeV to high..)
-- GosiaSudol - 06 Sep 2014
- pi+pi- missing mass, C + PE at 656 MeV:
| I | Attachment | Action | Size | Date | Who |
Comment |
|---|---|---|---|---|---|---|
 gif |
PIPPIM_INVM_COSTH_PT.gif | manage | 35 K | 2014-09-06 - 16:06 | GosiaSudol | pi+pi- invaraint mass vs. cos Theta in CM after cut on miss cut |
| gif |
PIPPIM_INV_MASS.gif | manage | 10 K | 2014-09-06 - 16:07 | GosiaSudol | pi+pi- invaraint mass |
| gif |
PIPPIM_MISS_MASS2_COSTH_PT.gif | manage | 33 K | 2014-09-06 - 16:07 | GosiaSudol | pi+pi- missing mass2 vs. pi+pi- cosTheta cm using PionTracker |
| gif |
PIPPIM_MISS_MASS2_PT.gif | manage | 11 K | 2014-09-06 - 16:07 | GosiaSudol | pi+pi- missing mass2 using PionTracker and not using |
| gif |
PIPPIM_MISS_MASS2_PT_INVM.gif | manage | 22 K | 2014-09-06 - 16:07 | GosiaSudol | pi+pi- missing mass2 vs. pi+pi- invariant mass using PionTracker |
| gif |
PIPPIM_miss_mass2_C_PE_656.gif | manage | 6 K | 2014-09-10 - 14:24 | GosiaSudol | pi+pi- missing mass, C + PE at 656 MeV |
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