Big Bang Nucleosynthesis results refined via the Trojan Horse Method
Nuclear Experiment
2026-01-01 v1 Cosmology and Nongalactic Astrophysics
Nuclear Theory
Abstract
This work presents the Trojan Horse Method (THM) as a powerful technique for measuring nuclear reaction cross sections at astrophysical energies. We then explore the impact of THM-derived reaction rates on the predictions of Standard Big Bang Nucleosynthesis (SBBN) using the PRIMAT code. Primordial abundances are shown for the single rate impact and, for the first time, also for all the THM rates together. The result shows significant differences with the use of THM rates, which in some cases goes in the direction of improving the agreement with the observations with respect to the use of only reaction rates from direct data, especially for the Li and deuterium abundances, which are still open issues for SBBN.
Keywords
Cite
@article{arxiv.2512.24358,
title = {Big Bang Nucleosynthesis results refined via the Trojan Horse Method},
author = {Roberta Spartà and Rosario Gianluca Pizzone and Livio Lamia and Alessandro Alberto Oliva and Marco La Cognata and Alessia Di Pietro and Pierpaolo Figuera and Giovanni Luca Guardo and Marco La Commara and Dario Lattuada and Marco Mazzocco and Sara Palmerini and Giuseppe Gabriele Rapisarda and Stefano Romano and Maria Letizia Sergi and Aurora Tumino},
journal= {arXiv preprint arXiv:2512.24358},
year = {2026}
}