As fate would have it, the identity of a "fifth force" of nature is becoming closely tied to LENR and the findings of Holmlid about proton annihilation.
Five years ago in Hungary, Attila Krasznahorkay at the Hungarian Inst.for Nuclear Research presented evidence for a previously undescribed light boson (17 MeV) - which is about 34 times heavier than the electron. This particle is similar to what Holmlid suggests are muons. Muons are 200 times heavier but there is some doubt about what Holmlid has found and it could be that there is a connection between the two. Here is the announcement which it should be noted was not subject to peer review. https://www.sciencealert.com/physicists-claim-a-they-ve-found-even-more-evidence-of-a-new-force-of-nature In short, the prior X17 finding was updated in a new context and is still being promoted as a related fifth force. BTW - Wiki now has an entry on the X17 particle. In thenew work, the proposed (fifth) force (or particle) may better explain a known muon anomaly and also provide a dark matter candidate, so it seems that several disparate phenomena are being merged into a single line of research. Krasznahorkay has nowobserved the anomaly in helium atoms similar to what had been observed in beryllium-8, strengthening the case for the X17 particle'sexistence - and also stronger but not mentioned is a further cross-connection to cold fusion since Be-8 has for 25 years or more been proposed as the reaction pathway way to expalin the absence of a strong gamma in the P-F effect. The implications of the possible merger of the X17 particle and a fifth force and ultra dense hydrogen and dark matter into a single phenomenon would be astounding. It would answer so many questions, previously written off as "pathological science" that it is easy to get excited about this additional finding.
