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arXiv · 1702.08417

Strong couplings and form factors of charmed mesons in holographic QCD

Alfonso Ballon-Bayona·Gastao Krein·Carlisson Miller
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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 $ρ$ meson to the charmed $D$ and $D^{*}$ mesons. We also compute electromagnetic form factors of the $π$, $ρ$, $K$, $K^*$, $D$ and $D^*$ mesons. We compare our results for the $D$ and $D^*$ mesons with lattice QCD data and other nonperturbative approaches.

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Alfonso Ballon-Bayona, Gastao Krein, Carlisson Miller. 2017-08-31. Strong couplings and form factors of charmed mesons in holographic QCD. https://doi.org/10.1103/physrevd.96.014017

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