Published 2015 | Version v1
Publication

Spectroscopy of geoneutrinos from 2056 days of Borexino data

Description

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.

Additional details

Identifiers

URL
http://hdl.handle.net/11567/813012
URN
urn:oai:iris.unige.it:11567/813012

Origin repository

Origin repository
UNIGE