So I'm working on a problem (Hartle problem 6, chapter 6) dealing with tachyons. So far, I have determined the four-velocity and the four-momentum (up to a sign) of a tachyon. I have, with the four-velocity being a unit spacelike four-vector,(adsbygoogle = window.adsbygoogle || []).push({});

[itex]u^{\alpha}=\frac{\pm 1}{\sqrt{\vec{V}^2-1}}(1,\vec{V})

[/itex]

(Sorry about the bad formatting...).

I don't want to just assume the positive values of [itex]u^{\alpha}[/itex].

I need help figuring out how to find the energy E given thatp=mu.

I realize I may have not phrased my dilemma well, so please ask for clarification.

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# Tachyonic Energies in a Minkowski Metric

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