Some superstring amplitude computations with the non-minimal pure spinor formalism

• Autor(a) principal: Berkovits, Nathan
• Data de Publicação: 2006
• Outros Autores: Mafra, Carlos R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://arxiv.org/abs/hep-th/0607187; http://dx.doi.org/10.1088/1126-6708/2006/11/079; http://hdl.handle.net/11449/36229
• topic: superstrings and heterotic strings; anomalies in field and string theories

We use the non-minimal pure spinor formalism to compute in a super-Poincare covariant manner the four-point massless one and two-loop open superstring amplitudes, and the gauge anomaly of the six-point one-loop amplitude. All of these amplitudes are expressed as integrals of ten-dimensional superfields in a pure spinor superspace which involves five theta coordinates covariantly contracted with three pure spinors. The bosonic contribution to these amplitudes agrees with the standard results, and we demonstrate identities which show how the t(8) and epsilon(10) tensors naturally emerge from integrals over pure spinor superspace.