weak nuclear force constant if larger: too much hydrogen would convert to helium in big bang; hence, stars would convert too much matter into heavy elements making life chemistry impossible if smaller: too little helium would be produced from big bang; hence, stars would convert too little matter into heavy elements making life chemistry impossible
Some include: The strong
nuclear constant, the
weak nuclear constant, the gravitational
force constant, the electromagnetic
constant, Ration of electron to proton mass, ration of protons to electrons, expansion rate of the universe, entropy level of the universe, mass density of the universe, velocity of light, etc..