LAUSR

There continues to be good reason to believe that dark matter particles, which only “feel” the gravitational force influence the local and distant universe (Karachentsev et al 2018, Nesti & Salucci 2012, Rubin 2004), despite drawing a complete blank in the search for such a particle (Drees et al 2001, Archambault et al 2012 & Vasiliki 2015). The expansion rate of the universe is defined by the Hubble constant h (Hubble 1929). Measurements of the Hubble constant at different wavelengths produce different results, differing well beyond their errors (Ade et al 2014 & Reiss et al 2018). Here it is shown that the two precise but different values for the Hubble constant can be used to derive the mass of a weakly interacting massive particle (WIMP). An approximate mass of 10eV is determined with indications of why, so far, it has not been found and what is required to get positive confirmation of its presence. This result also indicates that the Hubble constant is the sum of more than one contribution with suggestions for experimental tests to determine, more precisely, the level of these contributions.