Abstract
We report an improved geoneutrino measurement with Borexino from 2056 days of data taking. The present exposure is . Assuming a chondritic Th/U mass ratio of 3.9, we obtain geoneutrino events. The null observation of geoneutrinos with Borexino alone has a probability of (). 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.
- Received 25 June 2015
DOI:https://doi.org/10.1103/PhysRevD.92.031101
© 2015 American Physical Society
Focus
Neutrinos Detected from the Earth’s Mantle
Published 7 August 2015
About half of the neutrinos detected from natural, underground sources come from the Earth’s mantle, rather than the crust, according to an analysis of new neutrino detection data.
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