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Dynamical Soft-Wall AdS/QCD · Around

2008

Dynamical Soft-Wall AdS/QCD

Batell, Brian, Gherghetta, Tony

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We present a solution of the five-dimensional gravity-dilaton-tachyon equations of motion with a pure AdS_5 metric and a quadratic dilaton and linear tachyon in conformal coordinates.

This leads to an infrared soft wall model where the dilaton profile gives rise to linear Regge trajectories for the four-dimensional mass spectrum of the dual gauge theory.
Even though our approach is phenomenological the scalar fields resemble the dilaton and the closed string tachyon of a non-critical string theory.
Interestingly, the linear tachyon has the correct profile to imply that chiral symmetry is not restored for highly excited states.

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