Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-05-09
JHEP 0407 (2004) 071
Physics
High Energy Physics
High Energy Physics - Theory
TeX, harvmac, amssym.tex, 41 pp; references added
Scientific paper
10.1088/1126-6708/2004/07/071
We construct an iterative procedure to compute the vertex operators of the closed superstring in the covariant formalism given a solution of IIA/IIB supergravity. The manifest supersymmetry allows us to construct vertex operators for any generic background in presence of Ramond-Ramond (RR) fields. We extend the procedure to all massive states of open and closed superstrings and we identify two new nilpotent charges which are used to impose the gauge fixing on the physical states. We solve iteratively the equations of the vertex for linear x-dependent RR field strengths. This vertex plays a role in studying non-constant C-deformations of superspace. Finally, we construct an action for the free massless sector of closed strings, and we propose a form for the kinetic term for closed string field theory in the pure spinor formalism.
Grassi Pietro Antonio
Tamassia Laura
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