|
1
|
Apr 10/25 PionLT/KaonLT Analysis Meeting Notes
|
|
2
|
----------------------------------------------
|
|
3
|
(Notes by GH)
|
|
4
|
|
|
5
|
Today: KaonLT will be discussed first
|
|
6
|
|
|
7
|
Present
|
|
8
|
-------
|
|
9
|
Regina - Garth Huber, Nacer Hamdi, Alicia Postuma, Muhammad Junaid,
|
|
10
|
Nathan Heinrich, Vijay Kumar, Ali Usman
|
|
11
|
JLab - Dave Gaskell
|
|
12
|
Virginia - Richard Trotta
|
|
13
|
FIU - Pete Markowitz
|
|
14
|
CUA - Tanja Horn
|
|
15
|
|
|
16
|
Ali
|
|
17
|
---
|
|
18
|
pi+Delta0 BSA t-phi binning
|
|
19
|
- revised binning for Q2=3.0, W=3.14 high statistics setting
|
|
20
|
- change from 2 to 3 t-bins, upper limit of good range remains 0.70
|
|
21
|
- bin limits: 0-0.33, 0.33-0.42, 0.42-0.70
|
|
22
|
- excluded region: 0.70-1.10
|
|
23
|
- check phi coerage for these bins
|
|
24
|
- MM plots for each t-phi bin L,C,R SHMS settings look promising
|
|
25
|
|
|
26
|
- Q2-3.0, W-2.32 setting
|
|
27
|
- change from 1 to 2 t-bins, upper limit remains 0.90
|
|
28
|
- bin limits: 0-0.6, 0.6-0.9
|
|
29
|
- excluded region: 0.9-1.10
|
|
30
|
- MM plots for each t-phi bin will have some challenges but Ali is confident
|
|
31
|
- definitely a drop in statistics from 1 bin, but good phi coverage
|
|
32
|
|
|
33
|
- Nacer asks some questions about how the background near the Delta peak is
|
|
34
|
handled
|
|
35
|
- full MM region histo including pi+n peak is used for Background fit
|
|
36
|
- pi+n MC is fit to neutron peak
|
|
37
|
- SIDIS MC is fit to high MM region
|
|
38
|
- after the Bkd is fit, use zoomed in MM region for piDelta MC fit
|
|
39
|
- piDelta MC peak shape is compared to data after Bkd subtraction for
|
|
40
|
consistency
|
|
41
|
|
|
42
|
- 2 higher Q2 settings will not be rebinned due to low statistics
|
|
43
|
- Ali hopes to show Bkd subtracted fits for all 3 revised settings next week
|
|
44
|
- while fitting MCs to data, will do some systematics checks in parallel (fit
|
|
45
|
dependence)
|
|
46
|
|
|
47
|
Richard
|
|
48
|
-------
|
|
49
|
KaonLT high Q2 LT-separations
|
|
50
|
- Q2=3.0, W=2.32 (same setting as Ali just showed, but K+ instead of pi+)
|
|
51
|
- had some difficulty getting 0th iteration to work for this setting
|
|
52
|
- ended up trying Q2=4.4 functional form instead of Q2=3.0, W=3.14 form and
|
|
53
|
it seems to work a bit better, now getting iterations to converge
|
|
54
|
- result is a huge difference in R=Data/MC ratio between high and low epsilon
|
|
55
|
- low epsilon R about 1 for t=0.40-0.75 bin
|
|
56
|
- high epsilkon R about 2 for same bin
|
|
57
|
- large change in ratio seems to be due to large change in SIMC yields
|
|
58
|
between high and low epsilon, while data yields are more consistent
|
|
59
|
- this seems to imply a significant change in L/T ratio between this setting
|
|
60
|
and Q2=4.4
|
|
61
|
|
|
62
|
Vijay
|
|
63
|
-----
|
|
64
|
PionLT Q2=0.425 LT-separations
|
|
65
|
- updated last t-bin edge to 0.60 from higher value discussed last week
|
|
66
|
- revised t-phi plots shown for low, mid, high epsilon
|
|
67
|
- working on MM offset for all settings, i.e. match pi+n peak of data to MC
|
|
68
|
- old analysis script is breaking, it did too many tasks at once
|
|
69
|
- new script will be simpler
|
|
70
|
- plans to show MM plots next week
|
|
71
|
|
|
72
|
Nacer
|
|
73
|
-----
|
|
74
|
KaonLT Q2=0.50 LT-separations
|
|
75
|
- working on extracting yields per t-phi bin for Data and MC
|
|
76
|
- scripts are done, checked on some data runs
|
|
77
|
- checking error propagation of ROOT
|
|
78
|
- confirmed that ROOT is propagating the statistical errors of the data
|
|
79
|
correctly, but it appears ROOT has some issues when the normalization
|
|
80
|
itself has an uncertainty
|
|
81
|
- i.e. Y=Counts/Qeff, the uncertainty in Qeff is not propagated correctly
|
|
82
|
- adding this uncertainty "by hand" in the code, code is checked and should
|
|
83
|
be correct now
|
|
84
|
- will meet with Richard this week on updating weights each iteration w/o
|
|
85
|
rerunning SIMC
|
|
86
|
|
|
87
|
Alicia
|
|
88
|
------
|
|
89
|
Missing tracks Geant4 simulation
|
|
90
|
- finished 1st draft of TechNote and got code running on the group's server
|
|
91
|
(lark), that part is relevant for improving the transportability of the code
|
|
92
|
with slightly different G4 versions
|
|
93
|
- the TechNote will be sent shortly to Regina group and Richard, who should
|
|
94
|
check if the note provides good instructions for calculating the correction
|
|
95
|
for different analyses and that the code works correctly for them
|
|
96
|
- started calculating missing tracks correction for KaonLT u-channel
|
|
97
|
p(e,e'p)omega data
|
|
98
|
|
|
99
|
- still no update on BSA paper from PLB, hopefully soon
|
|
100
|
|
|
101
|
Nathan
|
|
102
|
------
|
|
103
|
Lumi study coincidence blocking correction
|
|
104
|
- Dave will try to look at Nathan's CoinTime plots this weekend and get back to
|
|
105
|
him on this
|
|
106
|
|
|
107
|
Junaid
|
|
108
|
------
|
|
109
|
PionLT Q2=3.85, W=2.62 LT-separations
|
|
110
|
- will change from 7 to 5 t-bins, as we discused last week and then calculate
|
|
111
|
yields
|
|
112
|
- yield calculation is different than Nacer's
|
|
113
|
- Junaid's version uses separate scripts for each part, while Nacer's is a
|
|
114
|
big all-in-one code (see Vijay's experience above)
|
|
115
|
|
|
116
|
|
|
117
|
Next Meeting
|
|
118
|
-------------
|
|
119
|
- Thur Apr 17 @ 15:30 Eastern/13:30 Regina
|
|
120
|
- PionLT will go first
|
|
121
|
** NOTE THE NEW TIME **
|
|
122
|
|
|
123
|
|
|
124
|
|
|
125
|
|
|
126
|
|
|
127
|
|