Exact Results in Non-Supersymmetric Large N Orientifold Field Theories

TL;DR

This paper demonstrates that certain non-supersymmetric large N orientifold gauge theories share exact non-perturbative properties with N=1 SYM, including calculable condensates and degenerate states, in the large N limit.

Contribution

It establishes a non-perturbative equivalence between a non-supersymmetric orientifold theory and N=1 SYM, extending exact results to the former.

Findings

Exact bifermion condensate calculation

Degenerate parity doublets confirmed

Vanishing cosmological constant at large N

Abstract

We consider non-supersymmetric large N orientifold field theories. Specifically, we discuss a gauge theory with a Dirac fermion in the anti-symmetric tensor representation. We argue that, at large N and in a large part of its bosonic sector, this theory is non-perturbatively equivalent to N=1 SYM, so that exact results established in the latter (parent) theory also hold in the daughter orientifold theory. In particular, the non-supersymmetric theory has an exactly calculable bifermion condensate, exactly degenerate parity doublets, and a vanishing cosmological constant (all this to leading order in 1/N).