Of interest in the identification of LENR "mystery radiation" (if it is found in the range of 3.5 keV) ... The key to modeling the annihilation of dense hydrogen without the expected large GeV energy dump is proposed to be "higher dimensional operators"...
To the extent that dense hydrogen is indeed "dark matter" or a major component as suggested by Mills and Holmlid, then the authors provide a mechanism for modest levels of gain, avoiding the controversial meson/muon shower of Holmlid. https://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.035002 ... "different scenarios are provided where keV dark matter annihilates to produce a monochromatic signal. The process is generated through the exchange of a light scalar of mass of order 300 keV–50 MeV coupling to photon through loops or higher-dimensional operators. For natural values of the couplings and scales, the model can generate a gamma-ray line which can fit with the recently identified 3.5 keV x-ray line." End of quote It seems inevitable that models with Universal extra dimensions will be needed - so "get used to it..." as they say. > JW: The other is the 3.5keV peak from "maybe" dark matter....This can easily > be derived from 500eV together with the energy of the second proton magnetic > momentum collapse step that delivers 4034 eV This energy can only be > transported by a local electron at a -500eV orbit so it results in 3.5kev. ---- Yes.This seems to me to be the "best guesstimate" for the signature of LENR "mystery radiation" as presented so far. But the direct evidence for this signature in actual experiments, is thin... yet this is the case with every other possibility - even thinner. The correlation of photonic energy at 3.56 eV to dark matter in cosmology is getting stronger and stronger - but that does not serve to strengthen the case or to validate a broader interpretation at the atomic level. The World awaits the defining, breakthrough experiment showing a strong signature at this value correlated to anomalous heat.
