English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The recent long-term shutdown of Japanese nuclear reactors has resulted in asignificantly reduced reactor $\bar{nu}_{e}$ flux at KamLAND. This runningcondition provides a unique opportunity to confirm and constrain backgroundsfor the reactor $\bar{nu}_{e}$ oscillation analysis. The data set also hasimproved sensitivity for other $\bar{nu}_{e}$ signals, in particular$\bar{nu}_{e}$'s produced in $\beta$-decays from $^{238}$U and $^{232}$Thwithin the Earth's interior, whose energy spectrum overlaps with that ofreactor $\bar{nu}_{e}$'s. Including constraints on $\theta_{13}$ fromaccelerator and short-baseline reactor neutrino experiments, a combinedthree-flavor analysis of solar and KamLAND data gives fit values for theoscillation parameters of $tan^{2} \theta_{12} = 0.436^{+0.029}_{-0.025}$,$\Delta m^{2}_{21} = 7.53^{+0.18}_{-0.18} \times 10^{-5} {eV}^{2}$, and$sin^{2} \theta_{13} = 0.023^{+0.002}_{-0.002}$. Assuming a chondritic Th/Umass ratio, we obtain $116^{+28}_{-27}$ $\bar{nu}_{e}$ events from $^{238}$Uand $^{232}$Th, corresponding to a geo $\bar{nu}_{e}$ flux of$3.4^{+0.8}_{-0.8} \times 10^{6} {cm^{-2}s^{-1}}$ at the KamLAND location. Weevaluate various bulk silicate Earth composition models using the observed geo$\bar{nu}_{e}$ rate.

Reactor On-Off Antineutrino Measurement with KamLAND