4 papers
Manifest Moebius invariance of massive tree-level three-point amplitudes in pure spinor superspace
Chen Huang, Carlos R. Mafra, Yi-Xiao Tao
Using BRST cohomology properties in pure spinor superspace and identities for OPE brackets of non-free fields, we obtain a new compact nested-bracket representation of massive tree…
The massive one-loop four-point string amplitude in pure spinor superspace
Carlos R. Mafra
The open- and closed-string three- and four-point one-loop amplitudes involving massless states and one first-level massive state are computed in pure spinor superspace. For the op…
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…
Towards massive field-theory amplitudes from the cohomology of pure spinor superspace
Carlos R. Mafra
By analogy with the formula for the massless string disk amplitudes, we define massive field-theory tree amplitudes and conjecture that the BRST cohomology structure of pure spinor…