Strong couplings and form factors of charmed mesons in holographic QCD

Abstract

We extend the two-flavor hard-wall holographic model of Erlich, Katz, Son and Stephanov [Phys.\ Rev.\ Lett.\ {\bf 95}, 261602 (2005)] to four flavors to incorporate strange and charm quarks. The model incorporates chiral and flavor symmetry breaking and provides a reasonable description of masses and weak decay constants of a variety of scalar, pseudoscalar, vector and axial-vector strange and charmed mesons. In particular, we examine flavor symmetry breaking in the strong couplings of the $\rho$ meson to the charmed $D$ and $D^{\ast }$ mesons. We also compute electromagnetic form factors of the $\pi$, $\rho$, $K$, $K^{\ast }$, $D$ and $D^{\ast }$ mesons. We compare our results for the $D$ and $D^{\ast }$ mesons with lattice QCD data and other nonperturbative approaches.

18 pages, 8 figures. V3: Added 3 new references. Version published in Phys. Rev. D

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• Spontaneous chiral symmetry breaking in holographic soft wall models
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• Quasi normal modes for Heavy Vector Mesons in a Finite Density Plasma
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• Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences
• Quark flavors in hot and dense holographic QCD: setup and comparison to data
• π Meson-Octet Baryon Coupling Constant Obtained by Hard-Wall AdS/QCD Model
• Strong coupling constants of charmed and bottom mesons with light vector mesons in QCD sum rules
• Anomalous and linear holographic hard wall models for light unflavored mesons
• Holographic information measures for spin-$3/2$ $\Delta$ baryons in AdS/QCD
• Dispersive Analysis of $D$- and $B$-Meson Form Factors with Chiral and Heavy-Quark Constraints
• Spectroscopy of charmonium-like mesons, heavy-light mesons with charm, AdS/QCD, and configurational entropy