Families of Singular and Subsingular Vectors of the Topological N=2 Superconformal Algebra

Details Families of Singular and Subsingular Vectors of the Topological N=2 Superconformal Algebra Families of Singular and Subsingular Vectors of the Topological N=2 Superconformal Algebra

1997-01-10

arxiv.org/abs/hep-th/9701041v2

Nucl.Phys. B514 (1998) 477-522

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 51 pages. One figure. Many improvements. Major revision

Scientific paper

10.1016/S0550-3213(97)00827-4

We analyze several issues concerning the singular vectors of the Topological N=2 Superconformal algebra. First we investigate which types of singular vectors exist, regarding the relative U(1) charge and the BRST-invariance properties, finding four different types in chiral Verma modules and twenty-nine different types in complete Verma modules. Then we study the family structure of the singular vectors, every member of a family being mapped to any other member by a chain of simple transformations involving the spectral flows. The families of singular vectors in chiral Verma modules follow a unique pattern (four vectors) and contain subsingular vectors. We write down these families until level 3, identifying the subsingular vectors. The families of singular vectors in complete Verma modules follow infinitely many different patterns, grouped roughly in five main kinds. We present a particularly interesting thirty-eight-member family at levels 3, 4, 5, and 6, as well as the complete set of singular vectors at level 1 (twenty-eight different types). Finally we analyze the D\"orrzapf conditions leading to two linearly independent singular vectors of the same type, at the same level in the same Verma module, and we write down four examples of those pairs of singular vectors, which belong to the same thirty-eight-member family.

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