I'm an engineer trying to get some understanding of string theory. I'm reading the Becker, Becker, & Schwarz book & am confused about the string mass calc in the R & NS sectors. As I understand it, the R sector contains fermions & NS has bosons. Yet, the mass squared in R depends on the sum of...
I'm a little confused about the relaionship between susy transformations involving Q generators & gso projection in superstring theory. If gso projection is used in RNS sectors, does that only eliminate certain states, such as tachyon, then susy must still be applied?
Or does gso projection...
I'm an engineer trying to get a reasonable laymen's/conceptual understanding of string theory. I've finally gotten a general understanding of developing classical equations of motion, but I'm a little stuck on relativistic equations.
As I understand it, relativistic equations of motion are...
I'm a layman trying to understand the symmetries used in the std model. I understand that
U(1), SU(2), & SU(3) are incorporated in the Lagrangians for internal symmetries. I've read that SO(3) is also used in the std model for Poincare spacetime symmetry. Is that true and if so, how is it...
I'm a layman trying to get a conceptual understanding of string theory. It's my understanding that SO(32) & E8 are used to compactify the 16 extra bosonic dimensions in heterotic theory, is that correct?
Also, it's my understanding that SO(32) is used in Type I for group symmetry. Does that...