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’

  1. ✦

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>