Counting states in heterotic SO(32) string theory | A First Course in String Theory

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c) … Write out the massless states of the theory (bosons and fermions) and describe the fields associated with the bosons.

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— This answer is my guess. —

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spacetime bosons:

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**What is the nature of each of the indices ?
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The vector index runs over eight values.

— c.f. p.323 *A First Course in String Theory* (Second Edition)

— c.f. the blog post Problem 14.5a3

— Me@2018-12-24 10:04:52 PM

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For the states in the form

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they

carry two independent vector indices , that run over eight values. There are therefore 64 bosonic states. Just like the massless states in bosonic closed string theory[,] they carry two vector indices. We therefore get a graviton, a Kalb-Ramond field, and a dilation:

(NS+, NS+) massless fields: .

— p.323 *A First Course in String Theory* (Second Edition)

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Then how about the states in the form

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What kinds of fields do they represent?

— Me@2018-12-24 10:42:03 PM

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— This answer is my guess. —

— Me@2018-12-23 11:16:56 PM

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2018.12.24 Monday (c) All rights reserved by ACHK