2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/134481The possible small variation downward by about $10^{-5}$, of the ratio of the proton mass to the electron mass, over cosmological time is related to the decrease with time of a small vacuum expectation value for a Goldstone-like pseudoscalar field. The initial vacuum expectation value controls the magnitude of a very small cosmological constant.8 pages, appendix addedAstrophysicsRelating a small decrease of (m_p/m_e) with cosmological time to a small cosmological constanttext