Analysis Questions » History » Version 12
Matthew Toups, 01/03/2018 09:14 PM
1 | 1 | Matthew Toups | h1. Analysis Questions |
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2 | 1 | Matthew Toups | |
3 | 6 | Matthew Toups | h2. GENIE |
4 | 1 | Matthew Toups | |
5 | 8 | Matthew Toups | h3. [[Energy, Momentum Conservation|Energy & Momentum Conservation]] |
6 | 3 | Matthew Toups | |
7 | 4 | Matthew Toups | * Asked by Janet |
8 | 4 | Matthew Toups | |
9 | 4 | Matthew Toups | * Assigned to XXX |
10 | 4 | Matthew Toups | |
11 | 4 | Matthew Toups | * At the interaction vertex, is momentum conserved? If not, why not? Is it because of a fake particle in the event? How are we handling this strictly from a kinematics point of view (not a model question)? Prove we handle missing energy properly when we move to different frames. If this is not handled right it will really screw up a lot of analyses, especially xsec analyses. |
12 | 4 | Matthew Toups | |
13 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
14 | 4 | Matthew Toups | |
15 | 4 | Matthew Toups | * Resolved: No |
16 | 1 | Matthew Toups | |
17 | 5 | Matthew Toups | h3. Boosting |
18 | 1 | Matthew Toups | |
19 | 5 | Matthew Toups | * Asked by Janet |
20 | 1 | Matthew Toups | |
21 | 5 | Matthew Toups | * Assigned to XXX |
22 | 1 | Matthew Toups | |
23 | 5 | Matthew Toups | * Are particles boosted correctly? I have been on experiments that did not have the correct boosts. So check it. |
24 | 1 | Matthew Toups | |
25 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
26 | 1 | Matthew Toups | |
27 | 5 | Matthew Toups | * Resolved: No |
28 | 1 | Matthew Toups | |
29 | 5 | Matthew Toups | h3. Protons boosting in MEC interaction |
30 | 1 | Matthew Toups | |
31 | 5 | Matthew Toups | * Asked by Janet |
32 | 1 | Matthew Toups | |
33 | 5 | Matthew Toups | * Assigned to XXX |
34 | 1 | Matthew Toups | |
35 | 5 | Matthew Toups | * Look at the protons produced in the MEC interaction – are these protons being boosted properly? |
36 | 1 | Matthew Toups | |
37 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
38 | 1 | Matthew Toups | |
39 | 5 | Matthew Toups | * Resolved: No |
40 | 1 | Matthew Toups | |
41 | 9 | Matthew Toups | h3. [[Neutron multiplicity|Neutron multiplicity]] |
42 | 1 | Matthew Toups | |
43 | 5 | Matthew Toups | * Asked by Janet |
44 | 1 | Matthew Toups | |
45 | 5 | Matthew Toups | * Assigned to XXX |
46 | 1 | Matthew Toups | |
47 | 5 | Matthew Toups | * Check the number of neutrons coming out. Tim has said he has seen an unphysical number. What does that mean? Prove you don’t have a mistake. |
48 | 1 | Matthew Toups | |
49 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
50 | 1 | Matthew Toups | |
51 | 5 | Matthew Toups | * Resolved: No |
52 | 1 | Matthew Toups | |
53 | 5 | Matthew Toups | h2. Beam flux |
54 | 1 | Matthew Toups | |
55 | 5 | Matthew Toups | h3. Beam rotation, width, parallax |
56 | 1 | Matthew Toups | |
57 | 5 | Matthew Toups | * Asked by Janet |
58 | 1 | Matthew Toups | |
59 | 5 | Matthew Toups | * Assigned to XXX |
60 | 5 | Matthew Toups | |
61 | 5 | Matthew Toups | * The solid angle of the detector is 5 mrads. Do we correct for this rotation in the simulation in order to match data? In fact, we need to think about beam width and parallax, because a neutrino with a 400 m travel distance actually has an opening angle of 6.25 mrads. Note that this will be flavor dependent. A consequence of not getting this right is that your muon angle distribution in the xsecs will be wrong. It also affects any analysis looking for transverse momentum or |
62 | 5 | Matthew Toups | |
63 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
64 | 5 | Matthew Toups | |
65 | 5 | Matthew Toups | * Resolved: No |
66 | 5 | Matthew Toups | |
67 | 5 | Matthew Toups | h2. Geant4 |
68 | 5 | Matthew Toups | |
69 | 5 | Matthew Toups | h3. dE/dx |
70 | 5 | Matthew Toups | |
71 | 5 | Matthew Toups | * Asked by Janet |
72 | 5 | Matthew Toups | |
73 | 5 | Matthew Toups | * Assigned to XXX |
74 | 5 | Matthew Toups | |
75 | 5 | Matthew Toups | * Check the dE/dx of the particles coming out against SRIM or any other data base. Prove it makes sense. I think it won’t because… |
76 | 5 | Matthew Toups | |
77 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
78 | 5 | Matthew Toups | |
79 | 5 | Matthew Toups | * Resolved: No |
80 | 5 | Matthew Toups | |
81 | 11 | Matthew Toups | h3. [[Delta production threshold|Delta production threshold]] |
82 | 5 | Matthew Toups | |
83 | 5 | Matthew Toups | * Asked by Janet |
84 | 5 | Matthew Toups | |
85 | 5 | Matthew Toups | * Assigned to XXX |
86 | 5 | Matthew Toups | |
87 | 5 | Matthew Toups | * The deltas probably have too high of a threshold, since I can pick out data compared to MC in the DL LEE images from the amount of delta sparkle. Check this. This affects the multiple scattering energy measurement, all EM energy measurements, including the michels and also may explain the PIDA problem (and why truncated dQ/dx works better). |
88 | 5 | Matthew Toups | |
89 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
90 | 5 | Matthew Toups | |
91 | 5 | Matthew Toups | * Resolved: No |
92 | 5 | Matthew Toups | |
93 | 5 | Matthew Toups | h3. Muon polarization and Michel spectrum |
94 | 5 | Matthew Toups | |
95 | 5 | Matthew Toups | * Asked by Janet |
96 | 5 | Matthew Toups | |
97 | 5 | Matthew Toups | * Assigned to XXX |
98 | 5 | Matthew Toups | |
99 | 5 | Matthew Toups | * The Michel energy and angle spectrum is surely wrong, since the MC does not include polarization. Explain to me why this doesn’t matter to your analysis. |
100 | 5 | Matthew Toups | |
101 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
102 | 5 | Matthew Toups | |
103 | 5 | Matthew Toups | * Resolved: No |
104 | 5 | Matthew Toups | |
105 | 5 | Matthew Toups | h3. Muon polarization and capture cross section |
106 | 5 | Matthew Toups | |
107 | 5 | Matthew Toups | * Asked by Janet |
108 | 5 | Matthew Toups | |
109 | 5 | Matthew Toups | * Assigned to XXX |
110 | 5 | Matthew Toups | |
111 | 5 | Matthew Toups | * Does muon polarization affect the capture cross section? (I don’t know the answer to this – I am just guessing that since capture is a weak process, it will). |
112 | 5 | Matthew Toups | |
113 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
114 | 5 | Matthew Toups | |
115 | 5 | Matthew Toups | * Resolved: No |
116 | 5 | Matthew Toups | |
117 | 5 | Matthew Toups | h3. Stopped pi+ Bragg peak |
118 | 5 | Matthew Toups | |
119 | 5 | Matthew Toups | * Asked by Janet |
120 | 5 | Matthew Toups | |
121 | 5 | Matthew Toups | * Assigned to XXX |
122 | 5 | Matthew Toups | |
123 | 5 | Matthew Toups | * Are stopped pi+’s that decay making a Bragg peak in the simulation? They should. |
124 | 5 | Matthew Toups | |
125 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
126 | 5 | Matthew Toups | |
127 | 5 | Matthew Toups | * Resolved: No |
128 | 5 | Matthew Toups | |
129 | 10 | Matthew Toups | h3. [[Pi+ scattering cross section|Pi+ scattering cross section]] |
130 | 5 | Matthew Toups | |
131 | 5 | Matthew Toups | * Asked by Janet |
132 | 5 | Matthew Toups | |
133 | 5 | Matthew Toups | * Assigned to XXX |
134 | 5 | Matthew Toups | |
135 | 5 | Matthew Toups | * Use a particle gun to produce pi+’s and check the fraction of time they hard scatter given the energy. Is it right? |
136 | 5 | Matthew Toups | |
137 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
138 | 5 | Matthew Toups | |
139 | 5 | Matthew Toups | * Resolved: No |
140 | 5 | Matthew Toups | |
141 | 5 | Matthew Toups | h2. CCpi0 analysis |
142 | 5 | Matthew Toups | |
143 | 5 | Matthew Toups | h3. Photon splitting/clustering |
144 | 5 | Matthew Toups | |
145 | 5 | Matthew Toups | * Asked by Janet |
146 | 5 | Matthew Toups | |
147 | 5 | Matthew Toups | * Assigned to XXX |
148 | 5 | Matthew Toups | |
149 | 5 | Matthew Toups | * There is a claim that the case of 2 EM blobs near a 1mu1p always corresponds to a pi0, so we don’t need to worry about the mass peak. Prove to me that a relatively high energy photon splitting into 2 blobs that do not cluster is rare. |
150 | 5 | Matthew Toups | |
151 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
152 | 5 | Matthew Toups | |
153 | 5 | Matthew Toups | * Resolved: No |
154 | 5 | Matthew Toups | |
155 | 5 | Matthew Toups | h3. Cosmic pi0 background |
156 | 5 | Matthew Toups | |
157 | 5 | Matthew Toups | * Asked by Janet |
158 | 5 | Matthew Toups | |
159 | 5 | Matthew Toups | * Assigned to XXX |
160 | 5 | Matthew Toups | |
161 | 5 | Matthew Toups | * How often do you get a pi0 from cosmic right on top of your CCQE event? According to Kazu, who has done a lot of scanning, about 1 in 3 BNBEXT has a pi0. There are so many more cosmics and so many more CCQE than CCpi0 that it seems very likely there will be some. If that isn’t right, please explain. |
162 | 5 | Matthew Toups | |
163 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
164 | 5 | Matthew Toups | |
165 | 5 | Matthew Toups | * Resolved: No |
166 | 5 | Matthew Toups | |
167 | 5 | Matthew Toups | h3. pi+/pi0 charge exchange |
168 | 5 | Matthew Toups | |
169 | 5 | Matthew Toups | * Asked by Janet |
170 | 5 | Matthew Toups | |
171 | 5 | Matthew Toups | * Assigned to XXX |
172 | 5 | Matthew Toups | |
173 | 5 | Matthew Toups | * Check the rate of pi+/pi0 charge exchange – is it right? Is your CCpi0 analysis taking charge exchange into account properly? |
174 | 5 | Matthew Toups | |
175 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
176 | 5 | Matthew Toups | |
177 | 5 | Matthew Toups | * Resolved: No |
178 | 5 | Matthew Toups | |
179 | 12 | Matthew Toups | h3. [[e+/e- conversion pair energies|e+/e- conversion pair energies]] |
180 | 5 | Matthew Toups | |
181 | 5 | Matthew Toups | * Asked by Janet |
182 | 5 | Matthew Toups | |
183 | 5 | Matthew Toups | * Assigned to XXX |
184 | 5 | Matthew Toups | |
185 | 5 | Matthew Toups | * Check the energies of the e+e- conversion pair. Does the ratio in the simulation make sense? |
186 | 5 | Matthew Toups | |
187 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
188 | 5 | Matthew Toups | |
189 | 5 | Matthew Toups | * Resolved: No |
190 | 5 | Matthew Toups | |
191 | 5 | Matthew Toups | h3. pi0 photons |
192 | 5 | Matthew Toups | |
193 | 5 | Matthew Toups | * Asked by Janet |
194 | 5 | Matthew Toups | |
195 | 5 | Matthew Toups | * Assigned to XXX |
196 | 5 | Matthew Toups | |
197 | 5 | Matthew Toups | * Check the energies of the two pi0 photons at truth level. Does the ratio make sense? |
198 | 5 | Matthew Toups | |
199 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
200 | 5 | Matthew Toups | |
201 | 5 | Matthew Toups | * Resolved: No |
202 | 5 | Matthew Toups | |
203 | 5 | Matthew Toups | h3. Hadronic invariant mass |
204 | 5 | Matthew Toups | |
205 | 5 | Matthew Toups | * Asked by Janet |
206 | 5 | Matthew Toups | |
207 | 5 | Matthew Toups | * Assigned to XXX |
208 | 5 | Matthew Toups | |
209 | 5 | Matthew Toups | * Check the invariant mass of the outgoing proton and pion in the resonant decays. Does it make sense? Yes, it will have smearing. Do a run with no Fermi motion as a cross check. |
210 | 5 | Matthew Toups | |
211 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
212 | 5 | Matthew Toups | |
213 | 5 | Matthew Toups | * Resolved: No |
214 | 5 | Matthew Toups | |
215 | 5 | Matthew Toups | h2. General analysis questions |
216 | 5 | Matthew Toups | |
217 | 5 | Matthew Toups | h3. Beam windows in data & MC |
218 | 5 | Matthew Toups | |
219 | 5 | Matthew Toups | * Asked by Janet |
220 | 5 | Matthew Toups | |
221 | 5 | Matthew Toups | * Assigned to XXX |
222 | 5 | Matthew Toups | |
223 | 5 | Matthew Toups | * Does every single xsec analysis use the right beam windows for data and MC? Are you aware of the window-length difference when doing the BNBEXT subtraction? Can you prove this is right for every single xsec analysis by making a plot for each? |
224 | 5 | Matthew Toups | |
225 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
226 | 5 | Matthew Toups | |
227 | 5 | Matthew Toups | * Resolved: No |
228 | 5 | Matthew Toups | |
229 | 5 | Matthew Toups | h3. POT counting for exclusive samples |
230 | 5 | Matthew Toups | |
231 | 5 | Matthew Toups | * Asked by Janet |
232 | 5 | Matthew Toups | |
233 | 5 | Matthew Toups | * Assigned to XXX |
234 | 5 | Matthew Toups | |
235 | 5 | Matthew Toups | * Many xsec analyses will need exclusive samples. Is the POT counting for exclusive samples wrong? Prove it is right. |
236 | 5 | Matthew Toups | |
237 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
238 | 5 | Matthew Toups | |
239 | 5 | Matthew Toups | * Resolved: No |
240 | 5 | Matthew Toups | |
241 | 5 | Matthew Toups | h3. MC efficiency estimates |
242 | 5 | Matthew Toups | |
243 | 5 | Matthew Toups | * Asked by Janet |
244 | 5 | Matthew Toups | |
245 | 5 | Matthew Toups | * Assigned to XXX |
246 | 5 | Matthew Toups | |
247 | 5 | Matthew Toups | * Nearly all of the xsec analyses are making very tough cuts in order to get to a sample that is as pure as possible. When you do this, the error on the efficiency goes way up. How are you determining the error on your efficiency? Why should I think this is right? Prove to me it makes sense. |
248 | 5 | Matthew Toups | |
249 | 5 | Matthew Toups | * Answer (by XXX): DocDB-XXXX |
250 | 5 | Matthew Toups | |
251 | 5 | Matthew Toups | * Resolved: No |