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

be greater than 5 degree.

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

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).

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.

-- GosiaSudol - 09 Sep 2014

I	Attachment	Action	Size	Date	Who	Comment
gif	PIPPIM_INVM_COSTH_PT.gif	manage	34 K	2014-09-07 - 00:21	GosiaSudol	pi+pi- invaraint mass vs. cos Theta in CM after cut on miss cut
gif	PIPPIM_INV_MASS.gif	manage	10 K	2014-09-07 - 00:20	GosiaSudol	pi+pi- invaraint mass
gif	PIPPIM_MISS_MASS2_COSTH_PT.gif	manage	32 K	2014-09-07 - 00:19	GosiaSudol	pi+pi- missing mass2 vs. pi+pi- cosTheta cm using PionTracker
gif	PIPPIM_MISS_MASS2_PT.gif	manage	12 K	2014-09-07 - 00:21	GosiaSudol	pi+pi- missing mass2 using PionTracker and not using
gif	PIPPIM_MISS_MASS2_PT_INVM.gif	manage	22 K	2014-09-07 - 00:19	GosiaSudol	pi+pi- missing mass2 vs. pi+pi- invariant mass using PionTracker
gif	PIPPIM_miss_mass2_C_PE_690.gif	manage	8 K	2014-09-09 - 12:15	GosiaSudol	pi+pi- missing mass, C + PE at 690 MeV

Topic revision: r2 - 2014-09-09, GosiaSudol

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