Holographic QCD Running Coupling Constant from the Ricci Flow
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866918143844155392 |
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| author | Cancio, Héctor Masjuan, Pere |
| author_facet | Cancio, Héctor Masjuan, Pere |
| contents | Through a holographic model of QCD, we present a phenomenological approach to study the running of the strong coupling constant $α_s$ in both non-perturbative and perturbative regimes. The renormalization of the metric tensor, driven by the Ricci Flow, and the breaking of conformal and chiral symmetries -- thanks to introducing a double dilaton model and large-$N_c$ corrections -- allow us to relate the existence of an infrared fixed point in the coupling constant with a smooth matching to pQCD well above 2 GeV. This is done through a model with two fit parameters and one matching point. The proposed dilaton model yields linear Regge trajectories and decay constants for scalar, vector, and tensor meson families similar to their experimental counterparts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_00455 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Holographic QCD Running Coupling Constant from the Ricci Flow Cancio, Héctor Masjuan, Pere High Energy Physics - Phenomenology Through a holographic model of QCD, we present a phenomenological approach to study the running of the strong coupling constant $α_s$ in both non-perturbative and perturbative regimes. The renormalization of the metric tensor, driven by the Ricci Flow, and the breaking of conformal and chiral symmetries -- thanks to introducing a double dilaton model and large-$N_c$ corrections -- allow us to relate the existence of an infrared fixed point in the coupling constant with a smooth matching to pQCD well above 2 GeV. This is done through a model with two fit parameters and one matching point. The proposed dilaton model yields linear Regge trajectories and decay constants for scalar, vector, and tensor meson families similar to their experimental counterparts. |
| title | Holographic QCD Running Coupling Constant from the Ricci Flow |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2408.00455 |