Message-Id: <200103020209.LAA07604@neutrino.kek.jp> Subject: Minutes of SciFi weekly meeting (01/Feb/28) Date: Fri, 02 Mar 2001 11:09:40 +0900 From: Makoto Sakuda <sakuda@neutrino.kek.jp> Subject: Minutes of SciFi weekly meeting (01/Feb/28) 1. Official Page Boyd answered questions raised at the K2K council and updated the figures. Walter/Boyd/Ishida are finishing the official page. 2. fgsim Boyd studied the effect of no LG system using FGSIM. He saw the increase by >2 in the statistics below 1 GeV. (http://~neutrino.kek.jp/~boyd/eff_nolg.ps He is studying the background fraction. A first look at the background shows a similar background level. He is asked to look at the statistics of 2-track sample. 3. MRD selection Iwashita looked at the matching distance between the MRD hit and scifi track for the first layer events. After using the distance scaled by the multiple scattering effect, he estimates 2% of them to be outside the 3sigma region. They are background according to the scanning result. This code will be taken in our selection. His selection will add 10% or more events to the First category. 4. 2-track analysis by Park Park did a quick look at 2-track sample with 2 hits. This bank should be taken in the analysis for the study of signals and noise. This info is important for us to understand the proton range distribution. 5. Low energy track reconstruction B.J.Kim will continue the 2-track analysis and the associated tracking developement which Park is doing. He hopes to reconstruct more neutrino events below 1 GeV using 2-tracks before the next collaboration meeting. His new alignment parameters should be updated for the new datasets. (He will re-do the alignment for Nov99-Jun00 data.) 6. Calibration We need the LED calibration to start the pixel simulation for the present data set. //
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