Presents a seam-graded recursive algebraic method that converts the closed string tachyon vacuum equation into a sequence of matrix inversions in the zero-momentum Lorentz-scalar sector.
Gauge Invariant 1PI Effective Superstring Field Theory: Inclusion of the Ramond Sector
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We construct off-shell amplitudes in heterotic and type II string theories involving arbitrary combination of Ramond and Neveu-Schwarz sector external states. We also construct the equations of motion of a gauge invariant 1PI effective field theory which reproduces these off-shell amplitudes. Using this construction we prove that the renormalized physical masses do not depend on the choice of local coordinate system and locations of picture changing operators used in defining the off-shell amplitudes. We also use this formalism to examine the conditions under which space-time supersymmetry is unbroken in the quantum theory.
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Recursive-algebraic solution of the closed string tachyon vacuum equation
Presents a seam-graded recursive algebraic method that converts the closed string tachyon vacuum equation into a sequence of matrix inversions in the zero-momentum Lorentz-scalar sector.