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arXiv · hep-th/0309013

QCD Quark Condensate from SUSY and the Orientifold Large-N Expansion

A. Armoni·M. Shifman·G. Veneziano
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Abstract

We estimate the quark condensate in one-flavor massless QCD from the known value of the gluino condensate in SUSY Yang-Mills theory using our newly proposed "orientifold" large-N expansion. The numerical result for the quark condensate renormalized at the scale 2 GeV is then given as a function of alpha_s(2 GeV) and of possible corrections from sub-leading terms. Our value can be compared with the quark condensate in (quenched) lattice QCD or with the one extracted from the Gell-Mann--Oakes--Renner relation by virtue of non-lattice determinations of the quark masses. In both cases we find quite a remarkable agreement.

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A. Armoni, M. Shifman, G. Veneziano. 2003-09-01. QCD Quark Condensate from SUSY and the Orientifold Large-N Expansion. https://doi.org/10.1016/j.physletb.2003.10.094

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