The Feynman iε in string theory View Full Text


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Article Info

DATE

2015-04

AUTHORS

Edward Witten

ABSTRACT

The Feynman iε is an important ingredient in defining perturbative scattering amplitudes in field theory. Here we describe its analog in string theory. Roughly one takes the string worldsheet to have Lorentz signature when a string is going on-shell although it has Euclidean signature generically. (This article is based on a talk presented at the Zuminofest in Berkeley, California, May 2-4, 2013.) More... »

PAGES

55

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/jhep04(2015)055

DOI

http://dx.doi.org/10.1007/jhep04(2015)055

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1034942420


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