Project

General

Profile

Kaon LT Meetings » mtg_22jan12.txt

Garth Huber, 01/15/2022 03:31 PM

 
1

    
2
		Jan 12/22 PionLT/KaonLT Analysis Meeting Notes
3

    
4
Participants:
5
 - Richard Trotta, CUA
6
 - Pete Markowitz, FIU
7
 - Dave Gaskell, JLab
8
 - Jacob Murphy, Ohio
9
 - Nathan Heinrich, Garth Huber, Muhammad Junaid, Stephen Kay, Vijay Kumar,
10
   Love Preet, Ali Usman, Regina
11

    
12
Please remember to post your slides at:
13
https://redmine.jlab.org/projects/kltexp/wiki/Kaon_LT_Meetings
14

    
15
Junaid
16
------
17
1) PID study from Sept PionLT data
18
- SHMS cuts to produce samples of pi+, K+ and proton physics events
19
- Suggestions:
20
  - need to show and optimize the SHMS calorimeter cuts, as the NGC distn is up
21
    to 30pe.  This is a bit surprising, so maybe there is some e+
22
    contamination.
23
  - RF cut for pi+:
24
    - get a nice peak between 1.3 and 2.7 when applying other PID and cointime
25
      cuts
26
    - can use the RF cut to optimize other PID cuts, but probably should not
27
      use it for the final pi+ analysis as it looks like you loose too many pi+
28
  - RF cut for K+:
29
    - get a clear peak at RF=1.0ns, but this appears to NOT be K+.  Judging from
30
      the MM-RF correlation, the real K+ are offset slightly from pi+, pions
31
      centered at 1.8, K+ centered at 1.5
32
  - RF cut for protons:
33
    - the peak at 1.0ns appears to be the protons.  The RF cut appears to be
34
      quite effective in separating them from K+/pi+
35
  - unexplained RF features:
36
    - there is a "wrap around" RF peak at 3.7.  This should be studied to be
37
      sure we understand what it is.
38
    - Not sure what the additional peak at 3.0 is.  Please re-check if the RF
39
       offset is the same for all runs or not.
40

    
41
Richard
42
-------
43
1) EDTM study
44
- finished a second set of runs over the weekend.  Still need to analyze them.
45

    
46
2) Analysis Task List
47
- met with Vijay on how to split up the Heep and Lumi analysis tasks.
48

    
49
Vijay
50
-----
51
1) Heep-singles analysis from low Q2 Kaon-LT data
52
- implemented most of the changes discussed last week.
53
- comparison between data and SIMC is looking much better, except for some
54
  runs.
55
  - the two bumps in SHMS ypfp were indeed due to the HGC inefficient region
56
- Examples of both good and bad comparisons were shown.
57
  - Bad HMS comparison (#2 of 3.9 GeV).
58
    Dummy contribution is too large.
59
    Q2, epsilon distns offset from Dummy run.
60
    Definitely a kinematics-mismatch issue.
61
  - Bad SHMS comparison (#5 of 3.9 and #2 of 4.9 GeV).
62
    Data is too low compared to SIMC.
63
    This might be a tracking issue.  Please check the pruning selection
64
    parameters and the resulting tracking efficiencies.
65

    
66
Jacob
67
-----
68
1) EDTM Analysis
69
- started working on analysis of Lumi scan #3 and EDTM analysis.  Nothing to
70
  show yet.
71

    
72
Nathan
73
------
74
1) Mode 10 Analysis
75
- got hcana to compile.  Showed some early results from a defocused SHMS
76
  electron run.
77
- looking at hgcer Mode 10 data
78
  - reconstructed Pulse Time distn looks the same as FADC data
79
  - reconstructed Pulse Integral distn also looks the same
80
  - however, the Pulse Amplitude distn has some significant differences.  This
81
    needs to be understood.
82
  - while at JLab, Nathan will see if he can arrange a morning meeting with
83
    Mark to discuss his findings.
84

    
85
Next Meeting: Wed Jan 26 @ 11:00 Regina/NOON JLab time
(6-6/412)