Tachyons and black matter/energy

[fantasio]

Tachyons described in the Bosonic String Theory have an imaginary mass. So the square of it is negative. How does gravity laws apply to imaginary masses in the theory?
Is there any explanation in the bosonic string theory for black matter and black energy ?

These two questions can in fact be condensed into "Aren't black matter and black energy the ones of tachyons" (as per the string theory which recognises them of course).

F.

 

[Simon Bridge]

Welcome to PF;
I don't think that "black energy" and "black matter" are commonly defined terms.

Dark matter and energy is real matter and positive energy.
For properties of imaginary mass - see "exotic matter".

Bosonic String theory does not fit reality very well - it has been supplanted by superstrig theory.
http://www.dummies.com/how-to/content/bosonic-string-theory-the-first-string-theory.html

You don't need to invoke it to get tachyons.
http://en.wikipedia.org/wiki/Tachyon