Superluminal speed............

[quantizedzeus]

Have any scientist ever tried to put superluminal speed in lorentz transformations......? If they have then, have they found anything significant....??.....

[DrGreg]

Yes, anyone who knows what a complex number is can do it.

What you find is an answer that is an imaginary number, which is the mathematics' way of telling you that you've tried to use a formula in a situation where it is not valid.

The Lorentz transformation is between two inertial frames. One of the properties of an inertial frame is that it measures the speed of light to be c in all directions. That wouldn't make sense in a faster-than-light frame, so the Lorentz transform wouldn't apply.