Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-01-19
Phys.Lett.B652:79-85,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 4 figures. Revised and expanded version to appear in Physics Letters B
Scientific paper
10.1016/j.physletb.2007.07.006
We consider the heavy quark-antiquark potential in the AdS / QCD correspondence, focusing in particular on a recently calculated AdS-like metric deformed by back-reaction effects. We find that tuning the long-distance behaviour of the potential leads to a discrepancy at small distances, and discuss how to better constrain AdS / QCD geometries. A systematic comparison of various geometries is presented, based on goodness of fit to lattice data in the quenched approximation. The back-reacted geometry is seen to be phenomenologically favoured over an alternative geometry with the same number of parameters, although it does not perform as well as some other geometries.
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