BPS states in the Minahan-Nemeschansky E6{E_6} theory

Jul 6, 2016
35 pages
Published in:
  • Commun.Math.Phys. 353 (2017) 1, 317-351
  • Published: Nov 12, 2016
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Abstract: (Springer)
We use the method of spectral networks to compute BPS state degeneracies in the Minahan-Nemeschansky E6{E_6} theory, on its Coulomb branch, without turning on a mass deformation. The BPS multiplicities come out in representations of the E6{E_6} flavor symmetry. For example, along the simplest ray in electromagnetic charge space, we give the first 14 numerical degeneracies, and the first 7 degeneracies as representations of E6{E_6} . We find a complicated spectrum, exhibiting exponential growth of multiplicities as a function of the electromagnetic charge. There is one unexpected outcome: the spectrum is consistent (in a nontrivial way) with the hypothesis of spin purity, that if a BPS state in this theory has electromagnetic charge equal to n times a primitive charge, then it appears in a spin- n2{\frac{n}{2}} multiplet.
Note:
  • 39 pages
  • mass: deformation
  • symmetry: flavor
  • BPS
  • electromagnetic
  • multiplicity
  • multiplet
  • spectral
  • network
  • Coulomb
  • spin