Factorization of a two-loop four-point superstring amplitude

Details Factorization of a two-loop four-point superstring amplitude Factorization of a two-loop four-point superstring amplitude

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvl..60.1688y&link_type=abstract

Physical Review Letters, Volume 60, Issue 17, April 25, 1988, pp.1688-1691

Physics

19

Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity, Supersymmetry

Scientific paper

The behavior of the two-loop four-point graviton amplitude is investigated in the type-II superstring theory, where the genus-two Riemann surface degenerates into two tori. The amplitude turns out to be finite in this limit and it is shown explicitly to the lowest order of the pinching parameter that it produces the product of two one-loop amplitudes, as is expected from the factorization property.

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