What can the CNO neutrinos flux measurement done by Borexino say about ⁴⁰K geoneutrino flux?

Abstract

Borexino collaboration announced the observation of CNO neutrinos flux. Its value appeared larger than expected in case of the Sun high metallicity model. This could be regarded as evidence of large potassium content inside the Earth. The potassium abundance can reach (1.5 ± 1.0)% in the whole Earth and the Earth heat flux can be at the level of 200-300 TW. To resolve the problem a new experiment is demanded with a detector similar to Borexino one but better in backgrounds or a detector with another techniques of neutrino measurement, for example on base of 115In.

Potassium abundance in the Earth and Borexino data

“…The authors used three-fold coincidence method (TFC), described in Ref. [24], to suppress 11 C events; and the data are organized in two files: one is for TFC-subtracted (681.77 d of measurement) events depleted in 11 C and the other one for TFC-tagged (390 d of measurement) events enriched in 11 C. We have obtained these data and used in our analysis the file corresponding to 681.77 days.…”

“…The authors of Refs. [9], [10] and [11] assumed that (1) differs from (2) mainly due to the different contribution of 40 K-geo-(ν + ν) events in different energy ranges.…”