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2 votes

Formula for rate of expansion of the universe vs distance?

The relationship between proper distance and the rate of change of proper distance is Hubble's law. So $$ v(r_0) = H_0 r_0 \ .$$ Note that $H_0$ is the Hubble parameter at the present epoch. The ...
ProfRob's user avatar
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5 votes

If w bosons can create dark matter neutrinos by decay, can they also create dark energy?

The W boson has a lifetime of $3\times 10^{−25}$ seconds. So any big bang W bosons will have long decayed. So they are not a dark energy source. Also, they produce "hot" relativistic decay ...
Anders Sandberg's user avatar

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