Dynamical soft-wall AdS/QCD
نویسندگان
چکیده
منابع مشابه
Dynamical Soft-Wall AdS/QCD
We present a solution of the five-dimensional gravity-dilaton-tachyon equations of motion with a pure AdS5 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 phenomenologi...
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In the quenched approximation Domain Wall Fermions [1,2] (DWF) have been found to be an extremely successful approach to simulating QCD on the lattice. Crucial to this success is the fact that, when working at weak couplings (a ≈ 2GeV) and using improved gauge actions such as the DBW2 action, the degree of explicit chiral symmetry breaking is very small for practically useful sizes of the fifth...
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We propose a general class of five-dimensional soft-wall models with AdS metric near the ultraviolet brane and four-dimensional Poincaré invariance, where the infrared scale is determined dynamically. A large UV/IR hierarchy can be generated without any fine-tuning, thus solving the electroweak/Planck scale hierarchy problem. Generically, the spectrum of fluctuations is discrete with a level sp...
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We report on studies of the chiral properties of dynamical domain wall fermions combined with the DBW2 gauge action for different gauge couplings and fermion masses. For quenched theories, the DBW2 action gives a residual chiral symmetry breaking much smaller than what was found with more traditional choices for the gauge action. Our goal is to investigate the possibilities which this and furth...
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An obvious source of systematic error in numerical lattice QCD at present is the quenched approximation. Use of domain wall fermion (DWF) [1] dynamical quarks to lift this approximation is attractive because DWF preserve the flavor and chiral symmetries both on and off shell on the lattice before the continuum limit is taken. Evidently successful implementation would bring many advantages, such...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2008
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.78.026002