Abstract
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.
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ArXiv ePrint: 0906.4562
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Becciolini, D., Redi, M. & Wulzer, A. AdS/QCD: the relevance of the geometry. J. High Energ. Phys. 2010, 74 (2010). https://doi.org/10.1007/JHEP01(2010)074
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DOI: https://doi.org/10.1007/JHEP01(2010)074