For anyone who is pursuing the 3.7 keV connection – which would tie LENR into dark matter via a radiation signature and a body of mathematics going back to 1935 - here is a more comprehensive paper which does not consider LENR but lists a lot of other cosmological citations, and relates the emission range to a “sterile neutrino”. Wiki has an entry but methinks they too, are most likely confusing a related emission with the DDL, and that the 3.7 keV line is unrelated to neutrinos (or else both are related to fractional hydrogen). Perhaps the neutrino is a channel of DDL formation.
http://vixra.org/pdf/1406.0018v1.pdf And lest we forget the amazing claims of Louis Kervran in biological transmutation, it should be noted that CaCO3 (as a transmutation product for chicken eggs) has a notable signature in its 3.7 keV fluorescent X-ray line. The latter is possibly unrelated… if one believes in truly random coincidences. Jones

