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dc.contributor.authorAisaka, Yuri-
dc.contributor.authorBerkovits, Nathan-
dc.identifier.citationJournal of High Energy Physics. Trieste: Int School Advanced Studies, n. 7, p. 30, 2009.-
dc.description.abstractSince the b ghost in the pure spinor formalism is a composite operator depending on non-minimal variables, it is not trivial to impose the Siegel gauge condition b(0)V = 0 on BRST-invariant vertex operators. Using the antifield vertex operator V* of ghost-number +2, we show that Siegel gauge unintegrated vertex operators can be constructed as b(0)V* and Siegel gauge integrated vertex operators as integral dz b(-1)b(0)V*.These Siegel gauge vertex operators depend on the non-minimal variables, so scattering amplitudes involving these operators need to be regularized using the prescription developed previously with Nekrasov. As an example of this regularization prescription, we compute the four-point one-loop amplitude with four Siegel gauge integrated vertex operators. This is the first one-loop computation in the pure spinor formalism that does not require unintegrated vertex operators.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.description.sponsorshipNational Science Foundation-
dc.publisherInt School Advanced Studies-
dc.sourceWeb of Science-
dc.subjectSuperstrings and Heterotic Stringsen
dc.subjectString Field Theoryen
dc.titlePure spinor vertex operators in Siegel gauge and loop amplitude regularizationen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniv Calif Santa Barbara-
dc.description.affiliationSão Paulo State Univ, Inst Fis Teor, BR-01405900 São Paulo, Brazil-
dc.description.affiliationUniv Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA-
dc.description.affiliationUnespSão Paulo State Univ, Inst Fis Teor, BR-01405900 São Paulo, Brazil-
dc.description.sponsorshipIdFAPESP: 06/59970-5-
dc.description.sponsorshipIdFAPESP: 04/11426-0-
dc.description.sponsorshipIdCNPq: 300256/94-9-
dc.description.sponsorshipIdNational Science Foundation: PHY05-51164-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of High Energy Physics-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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