Date: Tue, 29 Apr 2003 09:57:55 +0900 (JST) From: OBAYASHI Yoshihisa <ooba@suketto.icrr.u-tokyo.ac.jp> Subject: Minutes of the K2K SK-data meeting, Apr. 24, 2003 (fwd) Message-ID: <Pine.SOL.3.96LJ1.1b7.1030429095631.10851A-100000@suketto1> Minutes of the K2K SK-data meeting 1) SK data update SK data taking was fine during last 1 week. 1 on-time FC event and 0 off time FC event was found. Golden-week shutdown from Apr.25 9:00 - 2) TQreal reprocess Apply TQ conversion with latest parameters. For k2k, apply only for the events within |tdiff_gps|<500us, to save CPU and tape access time. This reprocess wil be start just after beam stop. Though OD aclibration is not finished yet, TQ reprocess start before OD work finish. If OD calibration finished in time, TQ re-re-process will be done. SK badrun selection will be finished in Apr.25 3) MC, Calibration and Fitter status *Calibration: Ni calibration, Non-linearity correction and pc2pe constant are finalised. *MC tuning: MC gain is tuned by cosmic muon data. Absolute energy scale ischecked by decay-electron MC/data: +5.7% in MC/data of PE50 +2.7% in MC/data of N50 -> energy scale systematic could be +-3% *Fitter Major modified point in autofit: Treatment of not-existing tube in stmufit and ring edge pointing. Position resolution of afit is estimated. -> position resolution is almost same level of sk1. -> vertex shifts systematically for high energy(Pmu>1.5GeV) muons in ~40cm but effect for K2K events is small In total, Efficiency of fiducial volume cut (and 200MeV cut) will be estimated by these MC/Fitter. 4) Water parameter problem Miura reported a problem recentry found in the determination of latest water parameter which is done at Oct., 2001 collabration meeting. 5) Next meeting: Thu. May, 1 10:30 AM - Best regards, Yoshihisa OBAYASHI Sorry for delay of the circulation of this minutes. On Wed, 23 Apr 2003, OBAYASHI Yoshihisa wrote: > > Agenda for the K2K-SK data meeting, > > Thu. Apr., 24, 11:00- > > 1) SK data update (Obayashi) > > 2) TQreal reprocess for data (Obayashi) > > 3) MC and Fitter status (Kaneyuki) > > 4) Water parameter (Miura or Moriyama) > > 5) Others > > Best regards, > YO > >
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