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20132016201920222025051015202530
Abstract: (Springer)
M2 branes suspended between adjacent parallel M5 branes lead to light strings, the ‘M-strings’. In this paper we compute the elliptic genus of M-strings, twisted by maximally allowed symmetries that preserve 2d (2, 0) supersymmetry. In a codimension one subspace of parameters this reduces to the elliptic genus of the (4, 4) supersymmetric An1_{n-1} quiver theory in 2d. We contrast the elliptic genus of N M-strings with the (4, 4) sigma model on the N-fold symmetric product of R4{{\mathbb{R}}^4} . For N = 1 they are the same, but for N > 1 they are close, but not identical. Instead the elliptic genus of (4, 4) N M-strings is the same as the elliptic genus of (4, 0) sigma models on the N-fold symmetric product of R4{{\mathbb{R}}^4} , but where the right-moving fermions couple to a modification of the tangent bundle. This construction arises from a dual An1_{n-1} quiver 6d gauge theory with U(1) gauge groups. Moreover, we compute the elliptic genus of domain walls which separate different numbers of M2 branes on the two sides of the wall.
Note:
  • 75 pages, 16 figures. Minor corrections to the paper, references added
  • supersymmetry: 2
  • sigma model
  • quiver
  • domain wall
  • string
  • twist
  • dimension: 2
  • M-brane: 2
  • M-brane: 5