Project

General

Profile

Kaon LT Meetings » mtg_23apr20.txt

Garth Huber, 04/20/2023 05:37 PM

 
1
                 Apr 20/23 PionLT/KaonLT Analysis Meeting Notes
2
                 ----------------------------------------------
3
                           (Notes by GH and SJDK)
4

    
5
                    Today: PionLT will be discussed first
6

    
7
Please remember to post your slides at:
8
https://redmine.jlab.org/projects/kltexp/wiki/Kaon_LT_Meetings
9

    
10
Present
11
-------
12
Regina - Stephen Kay, Garth Huber, Muhammad Junaid, Ali Usman, Alicia Postuma, 
13
   Nathan Heinrich, Vijay Kumar, Love Preet
14
CUA - Tanja Horn
15
FIU - Pete Markowitz
16
JLab - Dave Gaskell
17
CSULA - Jonathan Conrad
18

    
19
Nathan Updates
20
--------------
21
Aerogel Calibration
22
- 3 param files for 2021/2022 data, 2x 2021-22, 1x summer 2022
23
- Need PID study before trusting pion yield numbers in recalibrated data
24
- Showing calib parameters and then comparison to online replay
25

    
26
- 6 GeV data, Q2=3.85, W=2.02 using 2nd calib file
27
   - With new calibration files, NPE peak has broadened slightly and moved
28
     slightly to the right
29
   - likely better separation between high PE (pion) and low PE (p,K) events
30
   - ~10x more counts >40PE than before
31
- 10.5 GeV data, Q2=3.85, W=2.62 using 3rd calib file
32
   - similarly, peak shifted to higher PE and broader distribution
33
- New aerogel params look good
34
   - will run some LD+/- data also to check
35

    
36
- HMS Cherenkov next to do, issues running this at the minute
37
   - SHMS HGC and NGC after that
38

    
39
Junaid
40
------
41
- Nuclear physics final tomorrow, so no report
42

    
43
Alicia
44
------
45
- Finals coming up too, no report
46

    
47
Ali updates
48
-----------
49
SIMC vs Data Heep PM/EM/W variables
50
- Richard's script to calculate variables in SIMC in the same way as the
51
  data
52
   - Replays failed overnight, as did Nathan's
53
      - What's the issue?
54

    
55
- HeeP 6.2, 8.2, 10.6 GeV data w/o offsets applied
56
   - PMY in all three cases, data mean is -0.013, same shift from SIMC
57
   - distribution gets a bit broader at higher energy, but qualitatively similar
58
   - Same mean for each, should one offset fix all of these?
59
- DG: Is PMY vertical or horizontal here?
60
   - Depending upon which it is, could just be fixable with a single out plane
61
     angle offset, don't know which arm though
62
   - AU: checked hcana after meeting, PMY is out-of-plane (OOP)
63

    
64
- Clarifications on derivatives calculated by heepcheck.f
65
   - TH: program only calculates in-plane variables since Heep e+p must be
66
     co-planar
67
   - program does not give out-of-plane offsets, free to adjust these at will
68
   - dW/dE_m/dp_m(par)/dp_m(perp) are all in MeV
69

    
70
- DG: need to be sure BPM calibration is correct in replay
71
   - hcana corrects the variables for the beam offset
72
   - if your offsets differ from Peter B, it might be due to wrong BPM calib
73
   - Ali will double-check
74

    
75
PID study 
76
- not 100% done, will rely upon Richard/Ali doing some iterations between each
77
  other
78

    
79
Richard
80
-------
81
- Not feeling well today, no report
82

    
83
Vijay Updates
84
-------------
85
Yield calculations for each (t,phi) bin
86
- Some bugs in script, busy fixing these, no plots yet
87

    
88
Stephen Updates
89
---------------
90
Hall C quarterly analysis meeting next Thursday, 13:00 Eastern
91
- 3 talks planned
92
- Richard on SIMC PM/EM calculation script
93
- David Hamilton on NPS software upgrades
94
- Carlos on Lumi studies
95

    
96
Next Meeting
97
------------
98
- Thur Apr 27 @ 16:00 Eastern/14:00 Regina/13:00 Pacific
99
- KaonLT will go first
(210-210/443)