Message-Id: <200101281545.AAA13727@neutrino.kek.jp> Subject: Minutes of SciFi meeting (01/Jan/27, 9:30, R346) Date: Mon, 29 Jan 2001 00:45:54 +0900 From: Makoto Sakuda <sakuda@neutrino.kek.jp> Minutes of SciFi meeting (01/Jan/27, 9:30, R346) TV meeting (KEK-Kobe-Kyoto-SUNY-BU-UW) We went thru the proposed talks for K2K meeting and asked comments. 1. Event summary for Jun99-Jun 00 -- Ishida He showed the event summary and explained the systematic errors. He will report the event rate from Y2001 at K2K meeting. 2. Event rate and neutrino spectrum *Boyd explained the event rate for MRD events. Delta-x distribution is shown. He doubled the statistics at low energy. He will obtain the neutrino spectrum with unfolding method. *Walter will study nuclear recoil effects. Inelastic/QE ratio can be obtained. dsigm/dq^2 (MA) distribution is shown. *Iwashita will find tracks in 2-nd layer of MRD. 3. Low energy 2-track events Park studied a possibility of reconstructing low energy 2-track events. One of the track has a match with VETO and a good vertex is reconstructed. Park finds 1. Proton energy can be measured with 120 MeV resolution from range in SciFi. (What makes a tail?) 2. If the 2nd track is contained, the first track is a muon at 90%. 3. Neutrino energy can be measured with ~400MeV using (E, theta) of proton track. 4. Npix(1)-Npix(2) can be used to resolve muon-proton combinations. 5. It is possible to obtain the ratio of cross section (aluminum/water) with +-20% statistical accuracy. Questions: * What is the flux error below 1 GeV? * Can we select good 2-track events without requiring a veto match? * How is Scifi result fed back to the oscillation analysis? At K2K meeting, more quantitative numbers will be reported. //
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