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Peer-reviewedCC BY 4.0Journal of High Energy Physics

Big Bang nucleosynthesis and the neutrino-extended Standard Model Effective Field Theory

  • Pieter Braat1,2
  • Jordy de Vries1,2
  • Jelle Groot1,2
  • Julian Y. Günther3
  • Juraj Klarić1,2,4
4 affiliations
  1. 1University of Amsterdam
  2. 2Nikhef, Theory Group
  3. 3Bethe Center for Theoretical Physics & Physikalisches Institut der Universität Bonn
  4. 4University of Zagreb
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Abstract

A bstract : We study the impact of light GeV-scale heavy neutral leptons (HNLs) on Big Bang nucleosynthesis (BBN) in the neutrino-extended Standard Model Effective Field Theory ( ν SMEFT). We show that, based on very general considerations, BBN constraints complement laboratory searches at colliders, beam dumps, and neutrinoless double beta decay, by providing an upper bound on the cut-off scale of the effective field theory for HNL masses above ~ 100 MeV. We identify target regions for future laboratory probes of the ν SMEFT parameter space, bounded from above and below, and illustrate them in representative scenarios, including EFT benchmarks based on operator subsets with universal Wilson coefficients.

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Cite

BibTeXRIS
BibTeX
@article{braat2026bang,
  title = {{Big Bang nucleosynthesis and the neutrino-extended Standard Model Effective Field Theory}},
  author = {Pieter Braat and Jordy de Vries and Jelle Groot and Julian Y. Günther and Juraj Klarić},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)103},
  url = {https://link.springer.com/article/10.1007/JHEP10(2026)103},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Big Bang nucleosynthesis and the neutrino-extended Standard Model Effective Field Theory
AU  - Pieter Braat
AU  - Jordy de Vries
AU  - Jelle Groot
AU  - Julian Y. Günther
AU  - Juraj Klarić
PY  - 2026
DA  - 2026/10/09
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)103
UR  - https://link.springer.com/article/10.1007/JHEP10(2026)103
AB  - A bstract : We study the impact of light GeV-scale heavy neutral leptons (HNLs) on Big Bang nucleosynthesis (BBN) in the neutrino-extended Standard Model Effective Field Theory ( ν SMEFT). We show that, based on very general considerations, BBN constraints complement laboratory searches at colliders, beam dumps, and neutrinoless double beta decay, by providing an upper bound on the cut-off scale of the effective field theory for HNL masses above ~ 100 MeV. We identify target regions for future laboratory probes of the ν SMEFT parameter space, bounded from above and below, and illustrate them in representative scenarios, including EFT benchmarks based on operator subsets with universal Wilson coefficients.
SN  - 1029-8479
ER  -