Non-Minimal Dilaton Inflation from the Effective Gluodynamics
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914361372573696 |
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| author | Pirzada Khan, Imtiaz Khan, Mussawair Li, Tianjun Muhammad, Ali |
| author_facet | Pirzada Khan, Imtiaz Khan, Mussawair Li, Tianjun Muhammad, Ali |
| contents | We study single-field inflation in which the inflaton is identified with the lightest scalar (dilaton) excitation of a confining gauge theory. The inflaton potential is not postulated: it follows from the pure effective Gluodynamics Lagrangian tightly constrained by the trace anomaly and the associated infinite tower of Ward identities, yielding a Coleman--Weinberg form with a logarithmic term fixed by nonperturbative condensates. After coupling to gravity via a non-minimal interaction $ξ\,φ^2 R$, the Einstein-frame potential develops a plateau consistent with current CMB observables. In the large-$ξ$ limit the model approaches the standard plateau attractor, while the Migdal--Shifman(MS) logarithmic structure induces a controlled, testable deformation governed by $A/λ$ across the CMB window. We quantify the resulting shifts in $(n_s,r)$ and the running analytically and confirm them with numerical scans over $(ξ,λ,A,μ)$, making the departure from the attractor both microphysically motivated and observationally predictive. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_00818 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Non-Minimal Dilaton Inflation from the Effective Gluodynamics Pirzada Khan, Imtiaz Khan, Mussawair Li, Tianjun Muhammad, Ali High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology We study single-field inflation in which the inflaton is identified with the lightest scalar (dilaton) excitation of a confining gauge theory. The inflaton potential is not postulated: it follows from the pure effective Gluodynamics Lagrangian tightly constrained by the trace anomaly and the associated infinite tower of Ward identities, yielding a Coleman--Weinberg form with a logarithmic term fixed by nonperturbative condensates. After coupling to gravity via a non-minimal interaction $ξ\,φ^2 R$, the Einstein-frame potential develops a plateau consistent with current CMB observables. In the large-$ξ$ limit the model approaches the standard plateau attractor, while the Migdal--Shifman(MS) logarithmic structure induces a controlled, testable deformation governed by $A/λ$ across the CMB window. We quantify the resulting shifts in $(n_s,r)$ and the running analytically and confirm them with numerical scans over $(ξ,λ,A,μ)$, making the departure from the attractor both microphysically motivated and observationally predictive. |
| title | Non-Minimal Dilaton Inflation from the Effective Gluodynamics |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2603.00818 |