Lecture 07 Mar

Today’s focus was how to calculate the mass of open strings stretched between Dp-branes. Specifically, we worked out the cases of

• 1 Dp-brane, which has a U(1) Maxwell field (with some transverse scalars) living on it;
• N Dp-branes, which have a U(N) non-abelian gauge theory (with some transverse scalars)  living on them.

The same technology will easily allow us next time to see how to do it for

• N Dp- and M Dq-branes with p<>q.