English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We attack the long-standing problem of finding the AdS dual of N = 2superconformal QCD, the N=2 super Yang Mills theory with gauge group SU(N_c)and N_f = 2 N_c fundamental hyper multiplets. The theory admits a Venezianoexpansion of large N_c and large N_f, with N_f/N_c and lambda = g^2 N_c keptfixed. The topological structure of large N diagrams motivates a generalconjecture: the flavor-singlet sector of a gauge theory in the Veneziano limitis dual to a closed string theory; single closed string states correspond to"generalized single-trace" operators, where adjoint letters andflavor-contracted fundamental/antifundamental pairs are stringed together in aclosed chain. We look for the string dual of N = 2 superconformal QCD from twofronts. From the bottom-up, we perform a systematic analysis of the protectedspectrum using superconformal representation theory. We also evaluate theone-loop dilation operator in the scalar sector, finding a novel spin chain.  From the top-down, we consider the decoupling limit of known braneconstructions. In both approaches, more insight is gained by viewing the theoryas the degenerate limit of the N = 2 Z_2 orbifold of N = 4 SYM, as one of thetwo gauge couplings is tuned to zero. A consistent picture emerges. We concludethat the string dual is a sub-critical background with seven "geometric"dimensions, containing both an AdS_5 and an S^1 factor. The supergravityapproximation is never entirely valid, even for large lambda, indeed the fieldtheory has an exponential degeneracy of exactly protected states with higherspin, which must be dual to a sector of light string states.

The Veneziano Limit of N=2 Superconformal QCD: Towards the String Dual of N=2 SU(N_c) SYM with N_f =2 N_c