BPS Wilson loops and Bremsstrahlung function in ABJ(M): a two loop analysis

Feb 17, 2014
40 pages
Published in:
  • JHEP 06 (2014) 123
  • Published: 2014
e-Print:

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Abstract: (Springer)
We study a family of circular BPS Wilson loops in = 6 super Chern-Simons-matter theories, generalizing the usual 1/2-BPS circle. The scalar and fermionic couplings depend on two deformation parameters and these operators can be considered as the ABJ(M) counterpart of the DGRT latitudes defined in = 4 SYM. We perform a complete two-loop analysis of their vacuum expectation value, discuss the appearance of framing-like phases and propose a general relation with cohomologically equivalent bosonic operators. We make an all-loop proposal for computing the Bremsstrahlung function associated to the 1/2-BPS cusp in terms of these generalized Wilson loops. When applied to our two-loop result it reproduces the known expression. Finally, we comment on the generalization of this proposal to the bosonic 1/6-BPS case.
Note:
  • 46 pages, 6 figures; references added
  • Supersymmetric gauge theory
  • Wilson, ’t Hooft and Polyakov loops
  • Chern-Simons Theories
  • Wilson loop: BPS
  • fermion: coupling
  • boson: operator
  • supersymmetry: 4
  • bremsstrahlung
  • deformation
  • cohomology