# Why is the low energy limit of type II superstring theory the ordinary supergravity theory

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Is there a detailed explanation that the supergravity theory is the low energy limit of type II superstring theory? In polchinsky's <<string theory>> no such proof was given, although it mentioned that "one can calculate the string amplitude for both theory" and derived the form of type II A and B supergravity.

edited Feb 9

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• Ralph Blumenhagen, Dieter Lüst, Stefan Theisen,
"String Scattering Amplitudes and Low Energy Effective Field Theory",
chapter 16 in
"Basic Concepts of String Theory",
Part of the series Theoretical and Mathematical Physics
Springer 2013
(TOC pdf, publisher page)
answered Feb 9 by (5,900 points)

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