Non-critical NSR string field theory and discrete states interaction in 2D supergravity

Details Non-critical NSR string field theory and discrete states interaction in 2D supergravity Non-critical NSR string field theory and discrete states interaction in 2D supergravity

1992-02-14

arxiv.org/abs/hep-th/9202049v1

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

String field theory for the non-critical NSR string is described. In particular it gives string field theory for the 2D super-gravity coupled to a $\hat{c}=1$ matter field. For this purpose double-step pictures changing operators for the non-critical NSR string are constructed. Analogues of the critical supersymmetry transformations are written for $D<10$, they form a closed on-shell algebra, however their action on vertices is defined only for discrete value of the Liouville momentum. For D=2 this means that spinor massless field has its superpartner in the NS sector only if its momentum is fixed. Starting from string field theory we calculate string amplitudes. These amplitudes for D=2 have poles which are related with discrete set of primary fields, namely 2R$\to$2R amplitude has poles corresponding to the n-level NS excitations with discrete momenta $p_1=n,~~p_2=-1\pm (n+1)$.

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