quote:
I've got a blue star ready for anyone who wants to explain what a primitive semi radius tachyon is. I can't seem to find anything about it except for references like that one in the OP.
A tachyon is simply a superluminal particle: it moves faster than light. A primitive particle is simply one that isn't a composite of anything else. In the standard model, this would have its own field type. Now string theory goes one step further than the standard model. Instead of particles being represented by fields, each particle is a manifestation of a vibrating string. Since a tachyon is a superluminal particle it can move backwards through time. This forms what is called a closed time-like curve. In string theory these types of curves are represented by strings that loop onto each other. Thus, they have a radius. These radii can have interesting properties. Some are imaginary, some are transcendental. Radii with those two properties are called semi-radii and I have no idea what I'm talking about, everything in this post has been made up, I've never heard of "primitive semi-radius tachyons" before, and I have no idea how to make sense of those terms.