Data Release Accompanying the 4th KamLAND Reactor Result

<last update : June 4, 2012>

 
  1. Paper

“Constraints on θ13 from A Three-Flavor Oscillation Analysis of Reactor Antineutrinos at KamLAND” by the KamLAND Collaboration (A. Gando et al.). September 2010.


Paper reference : The KamLAND Collaboration, Phys. Rev. D 83, 052002 (2011)

  1. Paper  | PostScript | PDF |

  1. χ2 map

The following is ‘KamLAND-only’

best-fit parameters :

| Plain Text | (55.9 MB)

Map

table to obtain the

constants on oscillation parameters in the 4th result paper.

The four columns are

and

in the plain text file.

  1. Links

  1. 2nd result (January 2005)

  “Measurement of Neutrino Oscillation with KamLAND: Evidence of Spectral Distortion” (| PostScript | PDF |)

  T. Araki et al., Phys. Rev. Lett. 94: 081801, 2005

  link to data release web page


  1. 3rd result (June 2008)

  “Precise Measurement of Neutrino Oscillation Parameters with KamLAND” (| PostScript | PDF |)

  S. Abe et al., Phys. Rev. Lett. 100: 221803, 2008

  link to data release web page

  1. Prompt Energy Spectrum

The following data file provides the estimated energy spectra for backgrounds and reactor anti-neutrino events given in 0.1MeV energy bins.  All histograms incorporate the energy-dependent selection efficiency.  In the table, the nine columns are shown below.  The total events above 0.9 MeV are given in the paper.

1. mid-point of the energy bin using positron energy scale (0.9 ≦ Ep (MeV) ≦ 8.5)

  1. 3.reactor anti-neutrino event spectrum for no-oscillation fit [total : 2879 ev]

  2. 4.reactor anti-neutrino event spectrum for three-flavor-oscillation fit [total : 1634 ev]

  3. 5.accidental background [total : 102.5 ev]

[total : 198.6 ev]

  1. 8.geo-neutrino from U decay (include neutrino oscillation effect) [total : 85 ev]

  2. 9.geo-neutrino from Th decay (include neutrino oscillation effect) [total : 21 ev]

6.

7.

[total : 24.8 ev]

2. observed candidate events in KamLAND [total : 2106 ev]

  1. Prompt Energy Spectrum  | Plain Text | (8 kB)

  1. Update Log

March 25, 2011 : 1st update

June 4, 2012      : Δχ2 table update.  sin2θ13 number of decimals is increased from 3 to 4.

<June 4, 2012 update>