Higgs-like inflation in scalar-torsion $f(T,ϕ)$ gravity in light of ACT-SPT-DESI constraints
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909978893221888 |
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| author | Kumar, Nitesh Otalora, Giovanni Reyes, Rodrigo Espinoza, Bastian Gonzalez-Espinoza, Manuel Saridakis, Emmanuel N. |
| author_facet | Kumar, Nitesh Otalora, Giovanni Reyes, Rodrigo Espinoza, Bastian Gonzalez-Espinoza, Manuel Saridakis, Emmanuel N. |
| contents | We study Higgs-like inflation in the framework of scalar-torsion gravity, focusing on the general class of $f(T,ϕ)$ theories in which gravitation is mediated by torsion rather than curvature. Motivated by the increasing precision of cosmic microwave background and large-scale-structure observations, we examine whether Higgs-like inflation remains compatible with current data in this extended gravitational setting. Working within the slow-roll approximation, we analyze the inflationary dynamics both analytically and numerically. In the dominant-coupling regime we derive closed-form expressions for the scalar spectral index and the tensor-to-scalar ratio as functions of the number of e-folds, and we subsequently relax this assumption by numerically solving the slow-roll equations. Confrontation with the latest constraints from Planck 2018, ACT DR6, DESI DR1, and BICEP/Keck shows that Higgs-like inflation in $f(T,ϕ)$ gravity is fully consistent with current bounds, naturally accommodating the preferred shift in the scalar spectral index and leading to distinctive tensor-sector signatures. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_24502 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Higgs-like inflation in scalar-torsion $f(T,ϕ)$ gravity in light of ACT-SPT-DESI constraints Kumar, Nitesh Otalora, Giovanni Reyes, Rodrigo Espinoza, Bastian Gonzalez-Espinoza, Manuel Saridakis, Emmanuel N. General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory We study Higgs-like inflation in the framework of scalar-torsion gravity, focusing on the general class of $f(T,ϕ)$ theories in which gravitation is mediated by torsion rather than curvature. Motivated by the increasing precision of cosmic microwave background and large-scale-structure observations, we examine whether Higgs-like inflation remains compatible with current data in this extended gravitational setting. Working within the slow-roll approximation, we analyze the inflationary dynamics both analytically and numerically. In the dominant-coupling regime we derive closed-form expressions for the scalar spectral index and the tensor-to-scalar ratio as functions of the number of e-folds, and we subsequently relax this assumption by numerically solving the slow-roll equations. Confrontation with the latest constraints from Planck 2018, ACT DR6, DESI DR1, and BICEP/Keck shows that Higgs-like inflation in $f(T,ϕ)$ gravity is fully consistent with current bounds, naturally accommodating the preferred shift in the scalar spectral index and leading to distinctive tensor-sector signatures. |
| title | Higgs-like inflation in scalar-torsion $f(T,ϕ)$ gravity in light of ACT-SPT-DESI constraints |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2512.24502 |