Difference: PIPPIM (1 vs. 6)

Revision 6
09 Sep 2014 - Main.GosiaSudol
Line: 1 to 1
 
META TOPICPARENT name="MomentumScan"

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

be greater than 5 degree.

Line: 20 to 20
 

Mean of the missing mass peak corresponds to mass of neutron 957 Mev
Added:
>
>

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_748.gif
  -- GosiaSudol - 05 Sep 2014
Added:
>
>

 
META FILEATTACHMENT attachment="PIPPIM_INV_MASS.gif" attr="" comment="pi+pi- invaraint mass" date="1409949905" name="PIPPIM_INV_MASS.gif" path="PIPPIM_INV_MASS.gif" size="10317" user="GosiaSudol" version="1"
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_PT_INVM.gif" attr="" comment="pi+pi- missing mass2 vs. pi+pi- invariant mass using PionTracker" date="1409949990" name="PIPPIM_MISS_MASS2_PT_INVM.gif" path="PIPPIM_MISS_MASS2_PT_INVM.gif" size="23730" user="GosiaSudol" version="1"
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_PT.gif" attr="" comment="pi+pi- missing mass2 using PionTracker and not using" date="1409950191" name="PIPPIM_MISS_MASS2_PT.gif" path="PIPPIM_MISS_MASS2_PT.gif" size="11926" user="GosiaSudol" version="1"
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_COSTH_PT.gif" attr="" comment="new" date="1409955482" name="PIPPIM_MISS_MASS2_COSTH_PT.gif" path="PIPPIM_MISS_MASS2_COSTH_PT.gif" size="32187" user="GosiaSudol" version="1"
META FILEATTACHMENT attachment="PIPPIM_INVM_COSTH_PT.gif" attr="" comment="pi+pi- invaraint mass vs. cos Theta in CM after cut on miss cut" date="1409992306" name="PIPPIM_INVM_COSTH_PT.gif" path="PIPPIM_INVM_COSTH_PT.gif" size="35778" user="GosiaSudol" version="1"
Added:
>
>
META FILEATTACHMENT attachment="PIPPIM_miss_mass2_C_PE_748.gif" attr="" comment="pi+pi- missing mass, C + PE at 748 MeV" date="1410271399" name="PIPPIM_miss_mass2_C_PE_748.gif" path="PIPPIM_miss_mass2_C_PE_748.gif" size="6530" user="GosiaSudol" version="1"
Revision 5
06 Sep 2014 - Main.PiotrSalabura
Line: 1 to 1
 
META TOPICPARENT name="MomentumScan"

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

be greater than 5 degree.

Line: 16 to 16
 

PIPPIM_MISS_MASS2_PT.gif
Added:
>
>
From a fit to the missing mass spectrum total number of pi+pi- events,after background subtraction (pol3), amounts to 980 k

Mean of the missing mass peak corresponds to mass of neutron 957 Mev
  -- GosiaSudol - 05 Sep 2014

META FILEATTACHMENT attachment="PIPPIM_INV_MASS.gif" attr="" comment="pi+pi- invaraint mass" date="1409949905" name="PIPPIM_INV_MASS.gif" path="PIPPIM_INV_MASS.gif" size="10317" user="GosiaSudol" version="1"
Revision 4
06 Sep 2014 - Main.GosiaSudol
Line: 1 to 1
 
META TOPICPARENT name="MomentumScan"

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

be greater than 5 degree.

Line: 10 to 10
 

to be within (0.8 - 1.03) is applied

PIPPIM_INV_MASS.gif
Added:
>
>

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 748 MeV is used).

PIPPIM_MISS_MASS2_PT.gif
Line: 20 to 22
 
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_PT_INVM.gif" attr="" comment="pi+pi- missing mass2 vs. pi+pi- invariant mass using PionTracker" date="1409949990" name="PIPPIM_MISS_MASS2_PT_INVM.gif" path="PIPPIM_MISS_MASS2_PT_INVM.gif" size="23730" user="GosiaSudol" version="1"
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_PT.gif" attr="" comment="pi+pi- missing mass2 using PionTracker and not using" date="1409950191" name="PIPPIM_MISS_MASS2_PT.gif" path="PIPPIM_MISS_MASS2_PT.gif" size="11926" user="GosiaSudol" version="1"
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_COSTH_PT.gif" attr="" comment="new" date="1409955482" name="PIPPIM_MISS_MASS2_COSTH_PT.gif" path="PIPPIM_MISS_MASS2_COSTH_PT.gif" size="32187" user="GosiaSudol" version="1"
Added:
>
>
META FILEATTACHMENT attachment="PIPPIM_INVM_COSTH_PT.gif" attr="" comment="pi+pi- invaraint mass vs. cos Theta in CM after cut on miss cut" date="1409992306" name="PIPPIM_INVM_COSTH_PT.gif" path="PIPPIM_INVM_COSTH_PT.gif" size="35778" user="GosiaSudol" version="1"
Revision 3
05 Sep 2014 - Main.GosiaSudol
Line: 1 to 1
 
META TOPICPARENT name="MomentumScan"

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

be greater than 5 degree.

Line: 7 to 7
 


PIPPIM_MISS_MASS2_PT_INVM.gif

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

Changed:
<
<

to be within (0.8 - 1.1) is applied

>
>

to be within (0.8 - 1.03) is applied

 

PIPPIM_INV_MASS.gif
Changed:
<
<

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 748 MeV is used).

>
>

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 748 MeV is used).

 

PIPPIM_MISS_MASS2_PT.gif

-- GosiaSudol - 05 Sep 2014

META FILEATTACHMENT attachment="PIPPIM_INV_MASS.gif" attr="" comment="pi+pi- invaraint mass" date="1409949905" name="PIPPIM_INV_MASS.gif" path="PIPPIM_INV_MASS.gif" size="10317" user="GosiaSudol" version="1"
Deleted:
<
<
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_COSTH_PT.gif" attr="" comment="pi+pi- missing mass2 vs. pi+pi- cosTheta cm using PionTracker" date="1409949956" name="PIPPIM_MISS_MASS2_COSTH_PT.gif" path="PIPPIM_MISS_MASS2_COSTH_PT.gif" size="32033" user="GosiaSudol" version="1"
 
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_PT_INVM.gif" attr="" comment="pi+pi- missing mass2 vs. pi+pi- invariant mass using PionTracker" date="1409949990" name="PIPPIM_MISS_MASS2_PT_INVM.gif" path="PIPPIM_MISS_MASS2_PT_INVM.gif" size="23730" user="GosiaSudol" version="1"
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_PT.gif" attr="" comment="pi+pi- missing mass2 using PionTracker and not using" date="1409950191" name="PIPPIM_MISS_MASS2_PT.gif" path="PIPPIM_MISS_MASS2_PT.gif" size="11926" user="GosiaSudol" version="1"
Added:
>
>
META FILEATTACHMENT attachment="PIPPIM_MISS_MASS2_COSTH_PT.gif" attr="" comment="new" date="1409955482" name="PIPPIM_MISS_MASS2_COSTH_PT.gif" path="PIPPIM_MISS_MASS2_COSTH_PT.gif" size="32187" user="GosiaSudol" version="1"
Revision 2
05 Sep 2014 - Main.PiotrSalabura
Line: 1 to 1
 
META TOPICPARENT name="MomentumScan"

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

be greater than 5 degree.

Line: 6 to 6
  PIPPIM_MISS_MASS2_COSTH_PT.gif


PIPPIM_MISS_MASS2_PT_INVM.gif
Changed:
<
<

In case of invariant mass in addition cut on missing mass2 of pi+pi-

is applied (0.8 - 1.1)

>
>

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

to be within (0.8 - 1.1) is applied

 

PIPPIM_INV_MASS.gif
Changed:
<
<

One can clearly see improvement using PionTracker information (blue line)

in comparison to not using it (red line).

>
>

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 748 MeV is used).

 

PIPPIM_MISS_MASS2_PT.gif
 
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