  The idea that the new particles invented in some models beyond the standard
model can appear only inside the loops is attractive. In this paper, we fill
these loops with off-shell tachyons, leading to a solution of the zero results
of the loop diagrams involving the off-shell non-tachyonic particles. We also
calculate the Passarino-Veltman $A_0^o$ and $B_0^o$ of the off-shell tachyons.

High Energy Physics - Phenomenology