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RNS mass calculation question

  1. Nov 1, 2011 #1
    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 bosonic & fermionic oscillator coefficients. Same w/ NS sector. Why not bosonic oscillators only in NS & fermionic oscillators only in R sector for the mass calc?

    Thanks to anyone taking the time to read this
    Larry Warren
    Joliet, IL
  2. jcsd
  3. Nov 2, 2011 #2

    They mean spacetime fermions and bosons, not world-sheet fermions and bosons.
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