Abstract
The complex dimension of the space of exactly marginal deformations for quiver CFTs dual to IIB theory compactified on Y p,q is known to be generically three. Simple general formulas already exist for two of the exactly marginal directions in the space of couplings, one of which corresponds to the sum of the (inverse squared of) gauge couplings, and the other to the β-deformation. Here we identify the third exactly marginal direction, ∫ which is dual to the modulus \( {\displaystyle {\int}_{2\hbox{-} \mathrm{cycle}}{B}_2} \) on the gravity side. This identification leads to a relation between the field theory gauge couplings and the vacuum expectation value of the gravity modulus that we further support by a computation related to the chiral anomaly induced by added fractional branes. We also present a simple algorithm for finding similar exactly marginal directions in any CFT described by brane tiling, and demonstrate it for the quiver CFTs dual to IIB theory compactified on L 1,5,2 and the Suspended Pinch Point.
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Ardehali, A.A., Zayas, L.A.P. On exactly marginal deformations dual to B-field moduli of IIB theory on SE5 . J. High Energ. Phys. 2014, 164 (2014). https://doi.org/10.1007/JHEP09(2014)164
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DOI: https://doi.org/10.1007/JHEP09(2014)164