Precision Measurement of Neutrino Oscillation Parameters with KamLAND

S. Abe et al. (The KamLAND Collaboration)
Phys. Rev. Lett. 100, 221803 – Published 5 June 2008; Errata Phys. Rev. Lett. 101, 119904 (2008); Phys. Rev. Lett. 101, 259901 (2008)

Abstract

The KamLAND experiment has determined a precise value for the neutrino oscillation parameter Δm212 and stringent constraints on θ12. The exposure to nuclear reactor antineutrinos is increased almost fourfold over previous results to 2.44×1032protonyr due to longer livetime and an enlarged fiducial volume. An undistorted reactor ν¯e energy spectrum is now rejected at >5σ. Analysis of the reactor spectrum above the inverse beta decay energy threshold, and including geoneutrinos, gives a best fit at Δm212=7.580.13+0.14(stat)0.15+0.15(syst)×105eV2 and tan2θ12=0.560.07+0.10(stat)0.06+0.10(syst). Local Δχ2 minima at higher and lower Δm212 are disfavored at >4σ. Combining with solar neutrino data, we obtain Δm212=7.590.21+0.21×105eV2 and tan2θ12=0.470.05+0.06.

  • Figure
  • Figure
  • Figure
  • Received 29 January 2008
  • Publisher error corrected 10 December 2008

DOI:https://doi.org/10.1103/PhysRevLett.100.221803

©2008 American Physical Society

Corrections

10 December 2008

Errata

Authors & Affiliations

Click to Expand

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 100, Iss. 22 — 6 June 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×