- #1

ChrisVer

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[itex]R= \frac{\nu_\mu + \bar{\nu}_\mu}{\nu_e +\bar{\nu}_e} =2[/itex]

for no Neutrino Oscillations?

An answer that I found gives:

[itex] \pi \rightarrow \mu \nu_{\mu} \rightarrow e \nu_e \nu_\mu \nu_\mu[/itex]

But I think this is "wrong" in general, because the muons can reach the Earth before interacting... at least it should be a function of the Zenith angle [itex]\theta[/itex] and their energies (boost).