K2K Feb/2001 Official Plots

Analysis summary pages which describe the results:

• Data/MC Ratio
  This slide summarizes the Data/MC Ratio and expected number of events at Super-K.
  
• Systematic Error Summary
  This slide summarizes the systematic terms for both the FGD analysis and expected number of events at Super-K.
• Sci-Fi analysis summary information page
  This information page contains the systematic error terms, constants used in the calculations and POT, spills etc. The Data/MC ratio and number of expected events are all summarized here for the entire analysis period. You should be able to find all the numbers you might need from the analysis.
  /ps/ StarOffice(v5.1)/

Sample event displays:

• Event examples in 2000 run:
  2 track
  
  • r2279.s18568/ side-top/ front
  • r2361.s1516/side-top/ front/
  • r2383.s18594/side-top /front/
  • r2409.s34505/side-top /front/
  • r2484.s16669/side-top /front/
  • r2521.s36891/side-top /front/
  single track r2234.s38405
  Front view (1999 June) /gif /ps/


• Example event from 2001 run:
  r3002.49107/gif /ps/

SciFi official plots:

• Sci-Fi analysis plots. (Neut MUC-3D). The same plots for Nuance .
  
  Page 1: Muon Energy distribution 1 track events
  Page 2: Angle of muon wrt to beam
  
  
• Sci-Fi analysis plots - Multitrack. (Neut MUC-3D). The same plots for Nuance .
  In these plots the hatched region is QE.
  
  Page 1: Muon energy 1 track
  Page 2: Angle of muon wrt to beam 1 track
  Page 3: Track Length of secondary track
  Page 4: Deviation of 2nd track from expected direction
  Page 5: Deviation of 2nd track from expected direction
  
  
• Sci-Fi analysis plots - Neutrino Spectrum/Flux Measurement.
  In these plots the hatched region is QE.
  
  In order to understand the spectrum analysis we have provided you with two summary pages you can read:
  
  event_selection describes the event selection procedure.
  background_subtraction describes the background subtraction procedure.
  explanation describes the procedure used to unfold the spectrum.
  
  See this README file for more detailed information on each plot. In the plots with 4 panels the top row is MUC3D and the bottom row are 1st layer events. The left column are 1 track events and the right column are two track events.
  
  

  Neut 4.1 Only	Neut 4.1/NUANCE
  data_mcNeut_comp	data_mc_comp	Neutrino energy dist.(assuming QE). This includes nonQE events
  data_mcNeut_bs_comp	data_mc_bs_comp	BG subtracted neutrino energy dist.(assuming QE). Angle cut on two track events.
  data_mcNeut_inel_comp	data_mc_inel_comp	Reconstructed neutrino spectrum, muon spectrum and muon angle in InEl sample. Used to confirm that BG shape is understood. Compared to inelastic MC spectrum.
  migrate_neut41	migrate_nuance	Efficiency matrices for the 4 event categories
  systematic_errors_neut41	systematic_errors_nuance	List of systematic errors considered in the energy spectrum analysis

  
  Results of the spectrum analysis: Note these plots are not flux but flux*(QE cross-section)
  
  For the official results you should use NEUT plots. You can use NUANCE to show consistency(component_enu_nuance is especially good for this).
  
  

  Efficiency Corrected Measured Neutrino Energy Spectrum(CCQE)
  Neut 4.1	Nuance
  enuspec_meas_neut41	enuspec_meas_nuance	Data only
  enuspec_mc_neut41	enuspec_mc_nuance	MC
  enuspec_all_neut41	enuspec_all_nuance	Data and MC
  enuspec_pion_neut41	enuspec_pion_nuance	Data and MC plus pion monitor flux predictions from pion measurements
  component_enu_neut41	component_enu_nuance	Spectrum by event category. Each plot is normalized by the area spanned by the data points.

Send comments and questions on these plots to walter@neutrino.kek.jp

Send comments to www@neutrino.kek.jp