Abstract
QCD with gauge group flows to an interacting conformal fixed point in three spacetime dimensions when the number of four-component Dirac fermions . We study the perturbative stability of this fixed point via the -expansion about four dimensions. We find that when the number of fermions is lowered to , a certain four-fermion operator becomes relevant and the theory flows to a new infrared fixed point that may be either massless or massive. F-theorem or entanglement monotonicity considerations complement our -expansion calculation.
- Received 8 August 2016
DOI:https://doi.org/10.1103/PhysRevD.94.065031
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