Problem 14.5c4 | Counting states in heterotic SO(32) string theory

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c) Are there tachyonic states in heterotic string theory?

Write out the massless states of the theory (bosons and fermions) …

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What is the meaning of ?

How come ?

— Me@2018-12-07 10:43:10 PM

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If we consider a rigidly rotating open string, is the proportionality constant that relates the angular momentum of the string, measured in units of , to the square of its energy . More explicitly,

— p.68

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As anticipated, the angular momentum is proportional to the square of the energy of the string. Comparing with equation (8.69) we deduce that

These equations relate the slope parameter to the string tension .

— p.69

— A First Course in String Theory

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