AdS/QCD: the relevance of the geometry



We investigate the relevance of the metric and of the geometry in five-dimensional models of hadrons. Generically, the metric does not affect strongly the results and even flat space agrees reasonably well with the data. Nevertheless, we observe a preference for a decreasing warp factor, for example AdS space. The Sakai-Sugimoto model reduces to one of these models and the level of agreement is similar to the one of flat space. We also consider the discrete version of the five-dimensional models, obtained by dimensional deconstruction. We find that essentially all the relevant features of “holographic” models of QCD can be reproduced with a simple 3-site model describing only the states below the cut-off of the theory.


AdS-CFT Correspondence QCD Confinement 1/N Expansion 


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Copyright information

© SISSA, Trieste, Italy 2010

Authors and Affiliations

  1. 1.ITPP, EPFLLausanneSwitzerland

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