Spectroscopy of geoneutrinos from 2056 days of Borexino data - INSPIRE

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Spectroscopy of geoneutrinos from 2056 days of Borexino data

Borexino

Collaboration

•

M. Agostini
(
- Munich, Tech. U.
)

Jun 15, 2015

5 pages

Published in:

Phys.Rev.D 92 (2015) 3, 031101

Published: Aug 7, 2015

e-Print:

1506.04610 [hep-ex]

DOI:

10.1103/PhysRevD.92.031101

Experiments:

BOREXINO

View in:

ADS Abstract Service

reference search140 citations

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Abstract: (APS)

We report an improved geoneutrino measurement with Borexino from 2056 days of data taking. The present exposure is (5.5±0.3)×1031 proton×yr. Assuming a chondritic Th/U mass ratio of 3.9, we obtain 23.7-5.7+6.5(stat)−0.6+0.9(sys) geoneutrino events. The null observation of geoneutrinos with Borexino alone has a probability of 3.6×10-9 (5.9σ). A geoneutrino signal from the mantle is obtained at 98% C.L. The radiogenic heat production for U and Th from the present best-fit result is restricted to the range 23–36 TW, taking into account the uncertainty on the distribution of heat producing elements inside the Earth.

Note:

4 pages, 4 figures

13.15.+g
29.40.Mc
91.35.-x
91.67.Qr
neutrino: geophysics
radioactivity
uranium
thorium
neutrino: mass
Borexino

References(16)

Figures(4)

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