Abstract
Laser-induced nuclear reactions in ultra-dense hydrogen H(0) (review in Physica Scripta 2019) give mesons (kaons and pions) which decay to muons. The process which gives the mesons is baryon annihilation (Holmlid, J. Hydrogen Energy 2021; Holmlid and Olafsson, High Energy Density Phys. 2021). The sign of the muons detected depends on the initial baryons, with D(0) in the meson source producing mainly positive muons and p(0) producing mainly negative muons. This charge asymmetry was reported in Holmlid and Olafsson (Heliyon 2019), and has been confirmed by later experiments with a coil current transformer as beam detector , also in another lab (unpublished). The current coil detector would give no signal from the muons if charge symmetry existed. The charge asymmetry of the muons seems first to be at variance with charge conservation. An analysis of the results which includes charge conservation is given here. It agrees with the standard model of particle physics. Using D(0), the asymmetry is, as previously, proposed to be due to capture of µ- in D atoms and D2 molecules. This gives emission of mainly µ+ and a fraction of > 50% of µ+ from D(0). In p(0), the capture rate of µ- is lower than in D(0). The emitted number of µ+ will be decreased by reaction between µ+ and abundant electrons, forming muonium particles. This effect decreases the fraction of emitted µ+ for both p(0) and D(0), and it is proposed to be the main reason for a larger fraction of emitted µ- in the case of p(0).