81 citations · 204 across the 16 of their papers we have counts for
3 papers · 1 filter
Theory of Superdualities and the Orthosymplectic Supergroup
Pietro Fré, Pietro Antonio Grassi, Luca Sommovigo +1
We study the dualities for sigma models with fermions and bosons. We found that the generalization of the SO(m,m) duality for D=2 sigma models and the Sp(2n) duality for D=4 sigma…
Triality Invariance in the N=2 Superstring
Leonardo Castellani, Pietro Antonio Grassi, Luca Sommovigo
We prove the discrete triality invariance of the N=2 NSR superstring moving in a D=2+2 target space. We find that triality holds also in the Siegel-Berkovits formulation of the sel…
Higher-loop amplitudes in the non-minimal pure spinor formalism
Pietro Antonio Grassi, Pierre Vanhove
We analyze the properties of the non-minimal pure spinor formalism. We show that Siegel gauge on massless vertex operators implies the primary field constraint and the level-matchi…