Baryonic symmetries and M5 branes in the AdS_4/CFT_3 correspondence

Understand

We study U(1) symmetries dual to Betti multiplets in the AdS_4/CFT_3 correspondence for M2 branes at Calabi-Yau four-fold singularities.

• Analysis of the boundary conditions for vector fields in AdS_4 allows for a choice where wrapped M5 brane states carrying non-zero charge under such symmetries can be considered.
• We begin by focusing on isolated toric singularities without vanishing six-cycles, and study in detail the cone over Q^{111}.
• The boundary conditions considered are dual to a CFT where the gauge group is U(1)^2 x SU(N)^4.