4 papers
A field-inspired derivation of open string amplitudes
Humberto Gomez, Renann Lipinski Jusinskas, Sitender Pratap Kashyap
We propose a new method for computing -point tree-level open string amplitudes, inspired by the field-theoretical perturbiner framework and bypassing world-sheet moduli integrat…
Two point amplitude for closed superstrings
Sitender Pratap Kashyap
We present a prescription for computing the tree-level two-point amplitude of closed strings in the pure spinor superstring formalism, thereby completing the analysis of such super…
Tension between string amplitude prescriptions with presumed spacetime supersymmetry
Thales Azevedo, Alessandro Georgoudis, Renann Lipinski Jusinskas +1
We analyze an alternative prescription for computing tree level scattering amplitudes in the pure spinor superstring. Proposed by Berkovits, and inspired by an earlier work by Lee…
Massless representation of massive superfields and tree amplitudes with the pure spinor formalism
Sitender Pratap Kashyap, Carlos R. Mafra, Mritunjay Verma +1
We construct the unintegrated vertex operator at the first mass level of the open superstring from the OPE of massless vertices. Using BRST cohomology manipulations, the tree ampli…