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The overall coefficient of the two-loop superstring amplitude using pure spinors

The overall coefficient of the two-loop superstring amplitude using pure spinors
The overall coefficient of the two-loop superstring amplitude using pure spinors
Using the results recently obtained for computing integrals over (non-minimal) pure spinor superspace, we compute the coefficient of the massless two-loop four-point amplitude from first principles. Contrasting with the mathematical difficulties in the RNS formalism where unknown normalizations of chiral determinant formulae force the two-loop coefficient to be determined only indirectly through factorization, the computation in the pure spinor formalism can be smoothly carried out.
hep-th
1029-8479
Gomez, Humberto
33283b17-811f-4955-b213-520c61c73e6e
Mafra, Carlos R.
5a40c14f-0ddb-4c0c-9ce5-acabc537cd01
Gomez, Humberto
33283b17-811f-4955-b213-520c61c73e6e
Mafra, Carlos R.
5a40c14f-0ddb-4c0c-9ce5-acabc537cd01

Gomez, Humberto and Mafra, Carlos R. (2010) The overall coefficient of the two-loop superstring amplitude using pure spinors. Journal of High Energy Physics, (17). (doi:10.1007/JHEP05(2010)017).

Record type: Article

Abstract

Using the results recently obtained for computing integrals over (non-minimal) pure spinor superspace, we compute the coefficient of the massless two-loop four-point amplitude from first principles. Contrasting with the mathematical difficulties in the RNS formalism where unknown normalizations of chiral determinant formulae force the two-loop coefficient to be determined only indirectly through factorization, the computation in the pure spinor formalism can be smoothly carried out.

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1003.0678v2 - Accepted Manuscript
Available under License University of Southampton Accepted Manuscript Licence.
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e-pub ahead of print date: 5 April 2010
Additional Information: 29 pages, harvmac TeX. v2: add references
Keywords: hep-th

Identifiers

Local EPrints ID: 435010
URI: http://eprints.soton.ac.uk/id/eprint/435010
DOI: doi:10.1007/JHEP05(2010)017
ISSN: 1029-8479
PURE UUID: 19b634d9-f576-4a40-b024-793980fc605a
ORCID for Carlos R. Mafra: ORCID iD orcid.org/0000-0001-9842-9654

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Date deposited: 17 Oct 2019 16:30
Last modified: 17 Mar 2024 03:33

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Author: Humberto Gomez
Author: Carlos R. Mafra ORCID iD

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