|
1
|
Dec 14/22 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 - Garth Huber, Stephen Kay, Ali Usman, Alicia Postuma, Nathan Heinrich
|
|
13
|
CSULA - Konrad Aniol
|
|
14
|
CUA - Richard Trotta, Tanja Horn
|
|
15
|
JLab - Dave Gaskell
|
|
16
|
|
|
17
|
Jacob Updates
|
|
18
|
-------------
|
|
19
|
- HMS Optics Matrix Element (ME) updates
|
|
20
|
- Met with Holly last week
|
|
21
|
- Making improvements to PolTar ME --> Optimized PolTar
|
|
22
|
- Comparing Recon 2018 (used for online except highest momentum), 6.6
|
|
23
|
GeV/c matrix, PolTar
|
|
24
|
- Sieve plane with Optimized PolTar is reasonable, some holes have a
|
|
25
|
weird tilt
|
|
26
|
- Upstream foil: -ve delta resolution is fairly bad
|
|
27
|
- Central foil: additional holes at lower right (+Ys,-Xs) since more
|
|
28
|
events pass (Ytar vs delta) cuts
|
|
29
|
|
|
30
|
- Discussion: More events now, why?
|
|
31
|
- Reconstructed to the wrong place?
|
|
32
|
- apply xpfp vs xfp cuts to identify sieve holes
|
|
33
|
- fit new ME, Ytar is known from foil target coordinate
|
|
34
|
- recalc what target quantities should be, check if Xtar is all right
|
|
35
|
- Ytar resolution is improved, peak is sharper and more events pass
|
|
36
|
narrow Ytar cut
|
|
37
|
|
|
38
|
- Showed result to Holly, doing a second pass fit, use "new" sieve holes to
|
|
39
|
try to get further improvement
|
|
40
|
- optimized the cuts
|
|
41
|
- No improvement in yfp for upstream/downstream foils
|
|
42
|
- Only improvement seemed to be on the central foil
|
|
43
|
- Second optimisation improved sieve rows Ys 1, 7 (slightly)
|
|
44
|
|
|
45
|
- working on a write-up for his thesis, will distribute
|
|
46
|
- making improvements to scripts so easier for someone else to do optimizations
|
|
47
|
in the future
|
|
48
|
- next step is to add in higher order elements and see if solver can do new
|
|
49
|
fit
|
|
50
|
- Holly is working on SHMS high momentum ME
|
|
51
|
- Will be presenting Optics updates at Hall C meeting in January
|
|
52
|
|
|
53
|
- almost done std.kin checks
|
|
54
|
|
|
55
|
Nathan Updates
|
|
56
|
--------------
|
|
57
|
- will start with Detector time optimizations after Finals (next week)
|
|
58
|
- Ref times etc
|
|
59
|
- Most cuts wide open, they work but could be narrowed
|
|
60
|
- will replay runs from different settings to see if Ref time jumping around
|
|
61
|
- following Carlos Yero instructions
|
|
62
|
|
|
63
|
- Nathan is giving the LT talk at the Hall C meeting (both expts)
|
|
64
|
- KaonLT: TH comment, its *very important* we present a plan on progress
|
|
65
|
toward cross sections, can't just keep giving the same talk, the data
|
|
66
|
taking was completed some time ago and people are eager to see progress
|
|
67
|
- RT can send efficiency plots almost immediately
|
|
68
|
- Jan 3 *Deadline* to send NH: some rough/preliminary cross section plots
|
|
69
|
|
|
70
|
- PionLT: initial analysis, try to stick to new material, not just online
|
|
71
|
|
|
72
|
- Meet with Ali/Richard and others next week to try and decide on the
|
|
73
|
structure of the talk
|
|
74
|
|
|
75
|
Junaid
|
|
76
|
------
|
|
77
|
- Still away, sent fancy pictures from his wedding in Pakistan
|
|
78
|
|
|
79
|
Vijay
|
|
80
|
-----
|
|
81
|
- returning Dec 24 from his father's funeral in India
|
|
82
|
|
|
83
|
Richard Updates
|
|
84
|
---------------
|
|
85
|
- Bill updated LT Separation directory containing all his datasets and scripts
|
|
86
|
not in GitHub
|
|
87
|
- can more easily see his iteration procedure now
|
|
88
|
- located at: /work/eic/users/billlee/omega_analysis
|
|
89
|
- Stephen needs to move this to a group/accessible area
|
|
90
|
|
|
91
|
- SIMC/hcana PMiss, EMiss discrepancies
|
|
92
|
- Adding in hcana calculations into SIMC
|
|
93
|
- In hcana, it uses the Boost function for TLorentz vectors to get them in
|
|
94
|
the right frame
|
|
95
|
- No such functions exist in SIMC so doing these manually
|
|
96
|
- TH: Analytical boost functions should already be in SIMC
|
|
97
|
- RT will check with Dave G or Mark Jones
|
|
98
|
|
|
99
|
Ali Updates
|
|
100
|
-----------
|
|
101
|
- fairly busy with end of semester teaching stuff
|
|
102
|
- Modifying error calculations (from Gaussian to Binomial) in report template
|
|
103
|
files
|
|
104
|
- Will improve error bars on all future replays
|
|
105
|
|
|
106
|
- Need to add correction factor for EDTM livetime that Dave G mentioned in the
|
|
107
|
last meeting
|
|
108
|
|
|
109
|
- HMS calorimeter efficiency study needed
|
|
110
|
|
|
111
|
Alicia Updates
|
|
112
|
--------------
|
|
113
|
- No new updates, courses/end of term keeping Alicia busy like lots of others
|
|
114
|
- Next on the table is the dummy target subtraction for the asymmetries
|
|
115
|
- Need to check error bar propagation
|
|
116
|
|
|
117
|
- Will replay many other data settings over break with the helicity enabled
|
|
118
|
|
|
119
|
- Comparisons of BSA data to models
|
|
120
|
- Alicia will run VR/VGG models to get LT' values at some point
|
|
121
|
- GH has contacted Kroll & Goloskokov re. GPD model calcs, no reply yet
|
|
122
|
- NOTE: Peter Kroll responds on Dec 15. He's interested in the data, but
|
|
123
|
it will be some months before he has time to look at it
|
|
124
|
- GH will also contact B-G Yu in Korea about Regge-based model
|
|
125
|
|
|
126
|
Discussion of JLab 20+ GeV Upgrade
|
|
127
|
----------------------------------
|
|
128
|
- GH: Hall C can do a lot without upgrading spectrometers to around ~18 GeV
|
|
129
|
beam energy, dictated by sum of HMS(7)+SHMS(11) momenta
|
|
130
|
- For exclusive reactions at least anyway, SIDIS has weaker constraint and
|
|
131
|
can use HMS+SHMS to even higher energy
|
|
132
|
- GH also looked at impact of replacing HMS with a new spectrometer capable
|
|
133
|
of smaller angle and higher momentum. Its impact was fairly limited in
|
|
134
|
comparison to what you can do with HMS+SHMS and 18GeV beam
|
|
135
|
|
|
136
|
- Pion form factor reach extended to Q2~11.5 GeV with an 18 GeV beam
|
|
137
|
- improvements are due to larger delta-epsilon because of higher upper beam
|
|
138
|
energy, and larger virtual photon flux at a given Q2
|
|
139
|
- conclusion from Aug 20+ workshop was that 16-18 GeV e- beam gives you the
|
|
140
|
12 GeV GPD program properly!
|
|
141
|
|
|
142
|
Next Meeting
|
|
143
|
------------
|
|
144
|
Wed Dec 21 @ 9:00 Eastern/8:00 Regina/6:00 Pacific
|
|
145
|
- KaonLT will go first
|
|
146
|
|
|
147
|
- GH will distribute a poll soon to pick a time for meetings after Jan 10
|