It is postulated (and shown experimentally) that many types of Mesons (maybe 60 or so) exist. Also we have both positive and negatively charged Muons. Do you think this problem has been addressed by Holmlid? Presumably it would make a big difference to how energy is created from emissions?
In the previously published general review it has been suggested that all different mesons and leptons with a lifetime longer than a few nanoseconds—as well as their antiparticles—have been observed, but shorter-lived particles cannot be observed with the experimental system used so far.
Positive muons have been observed: https://www.cell.com/heliyon/fulltext/S2405-8440(18)34875-8
Quote[...] Using D(0), the observed decay time is (2.23 ± 0.05) μs in agreement with the free muon lifetime of 2.20 μs. This signal is apparently due to the preferential generation of positive muons. Using p(0), the observed decay time is in the range 1–2 μs, thus shorter than the free muon lifetime, as expected when the signal is mainly caused by negative muons which interact with matter by muon capture.