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Abstract: We consider the type-IIB background generated by the strong-coupling limit ofNc D5 branes wrapped on S2, and focus our attention on a special class ofsolutions that exhibit walking behavior. We compute numerically the spectrum ofscalar fluctuations around vacua of this class. Besides two cuts, and sequencesof single poles converging on one of the branch points, the spectrum containsone isolated scalar, the mass of which is suppressed by the length of thewalking region. Approximate scale-invariance symmetry in the walking regionsuggests that this be interpreted as a light dilaton, the pseudo-Goldstoneboson of dilatations.



Autor: Daniel Elander, Carlos Nunez, Maurizio Piai

Fuente: https://arxiv.org/







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