Mantle geoneutrinos in KamLAND and Borexino

Details Mantle geoneutrinos in KamLAND and Borexino Mantle geoneutrinos in KamLAND and Borexino

2012-04-09

arxiv.org/abs/1204.1923v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, including 6 figures

Scientific paper

The KamLAND and Borexino experiments have observed, each at ~4 sigma level, signals of electron antineutrinos produced in the decay chains of thorium and uranium in the Earth's crust and mantle (Th and U geoneutrinos). Various pieces of geochemical and geophysical information allow an estimation of the crustal geoneutrino flux components with relatively small uncertainties. The mantle component may then be inferred by subtracting the estimated crustal flux from the measured total flux. To this purpose, we analyze in detail the experimental Th and U geoneutrino event rates in KamLAND and Borexino, including neutrino oscillation effects. We estimate the crustal flux at the two detector sites, using state-of-the-art information about the Th and U distribution on global and local scales. We find that crust-subtracted signals show hints of a residual mantle component, emerging at ~2.4 sigma level by combining the KamLAND and Borexino data. The inferred mantle flux slightly favors scenarios with relatively high Th and U abundances, within +-1 sigma uncertainties comparable to the spread of predictions from recent mantle models.

Affiliated with

Also associated with

No associations

Rating

Mantle geoneutrinos in KamLAND and Borexino does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Mantle geoneutrinos in KamLAND and Borexino, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mantle geoneutrinos in KamLAND and Borexino will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-652183