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Open-closed superstring amplitudes using vertex operators in AdS5xS5
(Universidade Estadual Paulista (Unesp), 2015-05-12)
In this thesis, a particular superstring scattering amplitude involving one closed string and N open string vertex operators in AdS5 ×S5 is studied in detail, usingthe pure-spinor formalism. After reviewing some background ...
Twistor-like constraints for the superparticle and the superstring
(Universidade Estadual Paulista (Unesp), 2016-04-05)
In this work we study actions for the superparticle and the superstring using twistor-like constraints. We write BRST charges for the superparticle and the superstring in ten dimensions, and the BRST charge for a particle ...
Non-renormalization conditions for four-gluon scattering in supersymmetric string and field theory
(Springer, 2009-11-01)
The constraints imposed by maximal supersymmetry on multi-loop contributions to the scattering of four open superstrings in the U(N) theory are examined by use of the pure spinor formalism. The double-trace term ...
Cornering the unphysical vertex
(Springer, 2013)
Hilbert space of curved βγ systems on quadric cones
(Int School Advanced Studies, 2014)