Analyticity of off-shell Green’s functions in superstring field theory

A bstract We consider the off-shell momentum space Green’s functions in closed superstring field theory. Recently [1], — after explicitly removing contributions of massless states have been shown to be analytic on a domain (to called LES domain) complex external momenta variables. Analyticity local QFTs without primitive is well-known result. Using Lorentz transformations and Bochner’s theorem allow extend larger subset domain. For 2-, 3- 4-point functions, full recovered. 5-point function, we are not able obtain analytically, only large part it While this problem arises also for higher-point expected technical issue.