Project

General

Profile

Kaon LT Meetings » mtg_23jul20.txt

Garth Huber, 07/20/2023 05:50 PM

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

    
5
                     Today: KaonLT 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 - Garth Huber, Ali Usman, Alicia Postuma, Muhammad Junaid, 
13
   Portia Switzer, Nathan Heinrich, Vijay Kumar
14
JLab - Dave Gaskell
15
CUA - Richard Trotta, Tanja Horn
16
FIU - Pete Markowitz
17
Ohio - Julie Roche
18
CSULA - Konrad Aniol
19

    
20
Richard Updates
21
---------------
22
DG, AU, RT met Monday on implementing HGC hole cut in SIMC
23
  - a common recon_hcana script will be used to calculate the variables and
24
    apply the cut for both hcana and SIMC
25
  - for now, the same HGC cut is used for low and high epsilon (Vijay's hole)
26
  - a larger hole will have to be drawn for the 10.6 GeV (high eps) data
27

    
28
GH, AU, RT, VK met to clarify some issues with LT-separation procedure
29
  - RT had a bug when combining runs, bug related to the RF time windows
30
  - *REMINDER* use Stephen's TOF-corrected RF variables for pi/K/p to get
31
    optimal RF resolution/particle separation
32
    See slides at: https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1199
33

    
34
MMk plot with PeterB's adjusted Aerogel cut <4pe & -5<RFtime<5ns
35
  - HGC hole cut also implemented, <1.5pe removes proton events
36
  - something seemed wrong, the hole cut removed way too many events
37
  - upon further check, RT realizes the cut was backwards, keeping ONLY the
38
    hole
39

    
40
Ali Updates
41
-----------
42
- new effic calcs w/finalized PID cuts for analysis & recalculating them
43
- setting up SIMC for LT-sep iterations
44
   - DG pushed Delta Breit-Wigner shape changes from PeterB
45
      - code is in physics_pion.f, uses exclusive pi+n model and applies
46
        scaling factor
47
      - longer term, we should make physics_delta_recoil.f with an entirely new
48
        cross section model, after we have LT-separated results
49
- PID cuts finlized for pi+
50
   - working on t-binning
51

    
52
Vijay Updates
53
-------------
54
HMS calorimeter efficiency update
55
  - Heep data are very clean, applied >0.7 cut, but would get same efficiency
56
    if a lower cut >0.2 was used
57
  - get efficiency 0.9979+/-4E-5
58
  - will apply this efficiency to ALL data, even those physics runs P<1 GeV/c
59
    with lower cut, as we discussed last week
60

    
61
Next steps
62
  - restart Lumi and boiling studies
63
     - EDTM-LT already tested, no questions
64

    
65
Alicia Updates
66
--------------
67
PARTONS implementation
68
  - meeting tomorrow morning with Pawel Sznajder (Nat.Cent.Nucl.Res. Poland) on
69
    the discrepancy seen between her cross section values and those sent by GK
70

    
71
- GH, AP discussed a BSA paper outline
72
  - Overleaf project is set up
73
  - will draft assuming we submit to PRL
74
  - won't have space to list asymmetry results with two different fits 
75
     - can submit supplemental information (table of results, which can list
76
       both)
77
     - but the paper discussion will most likely be based on a weighted-average
78
       of the two results
79

    
80
Nathan Updates
81
--------------
82
HGC calib
83
  - reviews photoelectron fits from Vijay's code
84
  - puzzling trend in calib params
85
  - linear fits vs Run#
86
     - decreasing gain stopped after Dec/21 for PMTS 2,3,4
87
     - DG is planning to discuss this with Dave Mack now that he's back
88
  - has not yet implemented the calib fit functions into hcana
89
    standard.database
90

    
91
Working on verifying standard.kinematics for 2021 data
92

    
93
Junaid Updates
94
--------------
95
Fixing param files for 2021-22
96
   - OfflinePionLT_xxx-yyy.param
97
   - NH suggests to use a sed command to replace line43 in a uniform manner
98
     during the calorimeter calib process
99

    
100
Portia Updates
101
--------------
102
First comparison of PeterB's SIDIS model to MM histo shape right of DeltaPi
103
events looks promising
104
   - only plan to use SIDIS and DeltaPi SIMC distributions to get the shape,
105
     not the magnitude
106
   - will show some plots after more work has been done
107
 
108
Next Meeting
109
------------
110
- Thur July 27 @ 16:00 Eastern/14:00 Regina/13:00 Pacific
111
- PionLT will go first
112

    
113

    
114

    
115
  
116

    
117
 
118

    
(262-262/430)