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June 26, 2026The European Physical Journal COpen Access

Big bang nucleosynthesis constraints on f(T,Lₘ) gravity

Daniel F. P. Cruz David Pereira Francisco S. N. Lobo José P. Mimoso

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Key Points

This research aims to investigate the implications of f(T,L_m) gravity on Big Bang Nucleosynthesis.
Employs a semi-analytical BBN approach considering departures from General Relativity.
Calculates expansion-rate ratios and combines them with observationally inferred abundances of deuterium and helium-4.
Limits analysis to adiabatic conditions and reviews two-fluid models connecting early and late cosmology.
Provides BBN bounds on torsion–matter effective field theory corrections.
Identifies viable parameter regions consistent with early-Universe data under f(T,L_m) models.
Shows torsion-only cosmologies lead to GR-connected behavior at late times.

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Implication

Examines BBN outcomes under f(T,L_m) gravity, suggesting potential new physics implications.

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Cite This Study

Cruz et al. (2026) studied this question.

synapsesocial.com/papers/6a40bb4561bb0a67205c6e26 https://doi.org/10.1140/epjc/s10052-026-15949-w

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