A dynamical Einstein-Proca-dilaton holographic model and exotic hybrid meson resonances
Abstract
A fully dynamical Einstein-Proca-dilaton (EPD) holographic model is developed for the exotic JPC=1−+ hybrid meson, incorporating the backreaction of the massive vector field dual to the hybrid current in the bulk. Solving the coupled EPD system yields a self-consistent gravitational background and the mass spectrum of hybrid resonances. While the soft-wall limit reproduces linear Regge behavior, the inclusion of backreaction yields quantitative shifts that improve agreement with experimental candidates. The finite-temperature regime is approached by studying black hole thermodynamics and spectral functions across the confinement-deconfinement transition, fixing the Hawking-Page temperature to Tc ∼ 150 MeV. Unlike non-backreacted AdS/QCD models, the dynamical background predicts a strong suppression of hybrid states already near the onset of deconfinement. These results demonstrate that gravitational backreaction has measurable consequences for both vacuum spectroscopy and in-medium properties of exotic hybrid mesons, emphasizing the relevance of a dynamical self-consistent approach in AdS/QCD.
Related
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BibTeX
@misc{toniato2026dynamical,
title = {{A dynamical Einstein-Proca-dilaton holographic model and exotic hybrid meson resonances}},
author = {Bruno Toniato and David Dudal and Hudson Almeida and Roldao da Rocha},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.06411},
eprint = {2611.06411},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.06411},
}
RIS
TY - UNPB
TI - A dynamical Einstein-Proca-dilaton holographic model and exotic hybrid meson resonances
AU - Bruno Toniato
AU - David Dudal
AU - Hudson Almeida
AU - Roldao da Rocha
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2611.06411
UR - https://arxiv.org/abs/2611.06411
AB - A fully dynamical Einstein-Proca-dilaton (EPD) holographic model is developed for the exotic J^PC=1^−+ hybrid meson, incorporating the backreaction of the massive vector field dual to the hybrid current in the bulk. Solving the coupled EPD system yields a self-consistent gravitational background and the mass spectrum of hybrid resonances. While the soft-wall limit reproduces linear Regge behavior, the inclusion of backreaction yields quantitative shifts that improve agreement with experimental candidates. The finite-temperature regime is approached by studying black hole thermodynamics and spectral functions across the confinement-deconfinement transition, fixing the Hawking-Page temperature to T_c ∼ 150 MeV. Unlike non-backreacted AdS/QCD models, the dynamical background predicts a strong suppression of hybrid states already near the onset of deconfinement. These results demonstrate that gravitational backreaction has measurable consequences for both vacuum spectroscopy and in-medium properties of exotic hybrid mesons, emphasizing the relevance of a dynamical self-consistent approach in AdS/QCD.
ER -