Attendees: Guang Yang (GY), Ciro Riccio (CR), Chang Kee Jung (CKJ), Andriaseta Sitraka (AS), Abraham Teklu (AT), Christopher Mauger (CM), David Last (DL), David Martinez Caicedo (DMC), Eric Chong (EC), Jordi Capo (JC), Nataliya Skrobova (NS), Perri Zilberam (PZ), Rado Fanantenana Razakamiandra (RFR), Shih-Kai Lin (SL), Sunwoo Gwon (SG), Alexander Paul-Torres (APT), Mikhail Danilov (MD), Alex Ramirez (AR), Martin Tzanov (MT)
Alexander Paul Torres - 2020 Cosmics study
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GY: How can be the PCA linearity greater than 3? Can you send me the version of the code you are using? APT: Will do.
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MD: Slide 3: Do you have a cut on the PE? APT: I have a 5PE cut.
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CM: Do you have any condition that helps you to reject beam data? GY: This is just cosmic from 2020 data taking. We don't have beam data here.
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CKJ: I would not call it X, Y, Z plots. It is XY, XZ, YZ views.
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GY: Slide 6: Why the straight line fit (top right plot) should fail? APT&MT: Starting from the centroid and using PCA eigenvectors now. CKJ: Is the default tracking fitting used for the neutron selection? GY&CR&DL: No, it is a function implemented in the code and that we wanted to use for the vertex finding but after some studies we decided NOT to use it.
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CKJ: Slide 9: From where do you take L_S? APT: From the CERN TB paper. CKJ: 8 cm fibers are not long enough to extract the attenuation.
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GY: You can increase the statistics you can looking at the boundary layer. You can use them as trigger.
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EC: I did a quick check on the PCA linearity and it has 1 as upper bound. I think you are using the cluster width. APT: Actually, I am using the first eigeinvalue and not the linearity.
