All plots are done using pi+, pi- PID cut and opening angle between pi+pi- to

be greater than 5 degree.

PIPPIM_MISS_MASS2_COSTH_PT.gif

PIPPIM_MISS_MASS2_PT_INVM.gif

For the pi+pi invariant mass plot below a cut on the missing mass of pi+pi-

to be within (0.8 - 1.03) is applied

PIPPIM_INV_MASS.gif

PIPPIM_INVM_COSTH_PT.gif

One can see a clear improvement in missing mass resolution when incoming pion momentum is taken from the PionTracker reconstruction (blue line) (red line- only one fixed value of pi- momentum of 690 MeV is used).


PIPPIM_MISS_MASS2_PT.gif

Overlay of pi+pi- missing mass from PE (blue line) target and C (red line) one.

Spectra are normalized to yield in the ragio far from the peak position.

PIPPIM_miss_mass2_C_PE_690.gif

-- GosiaSudol - 09 Sep 2014
Topic attachments
I Attachment Action Size Date Who Comment
PIPPIM_INVM_COSTH_PT.gifgif PIPPIM_INVM_COSTH_PT.gif manage 34.5 K 06 Sep 2014 - 22:21 GosiaSudol pi+pi- invaraint mass vs. cos Theta in CM after cut on miss cut
PIPPIM_INV_MASS.gifgif PIPPIM_INV_MASS.gif manage 10.7 K 06 Sep 2014 - 22:20 GosiaSudol pi+pi- invaraint mass
PIPPIM_MISS_MASS2_COSTH_PT.gifgif PIPPIM_MISS_MASS2_COSTH_PT.gif manage 32.1 K 06 Sep 2014 - 22:19 GosiaSudol pi+pi- missing mass2 vs. pi+pi- cosTheta cm using PionTracker
PIPPIM_MISS_MASS2_PT.gifgif PIPPIM_MISS_MASS2_PT.gif manage 12.4 K 06 Sep 2014 - 22:21 GosiaSudol pi+pi- missing mass2 using PionTracker and not using
PIPPIM_MISS_MASS2_PT_INVM.gifgif PIPPIM_MISS_MASS2_PT_INVM.gif manage 22.8 K 06 Sep 2014 - 22:19 GosiaSudol pi+pi- missing mass2 vs. pi+pi- invariant mass using PionTracker
PIPPIM_miss_mass2_C_PE_690.gifgif PIPPIM_miss_mass2_C_PE_690.gif manage 8.0 K 09 Sep 2014 - 10:15 GosiaSudol pi+pi- missing mass, C + PE at 690 MeV
Topic revision: r2 - 09 Sep 2014, GosiaSudol
 
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