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Constraints on baryon-number-violating top-quark operators in standard model effective field theory

Hector Gisbert1,2,3,*, Antonio Rodríguez-Sánchez4,5,6,†, and Luiz Vale Silva6,7,‡

  • *Contact author: hector.gisbertmullor@unipd.it
  • †Contact author: arodrigu@sissa.it
  • ‡Contact author: luizva@ific.uv.es
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Phys. Rev. D 112, 015026 – Published 28 July, 2025

DOI: https://doi.org/10.1103/f81b-gry8

Abstract

Within the standard model effective field theory framework, we set indirect constraints on top quark operators that violate baryon number by one unit above the TeV scale. We find that these constraints are typically many orders of magnitude more stringent than the recently derived direct bounds from collider experiments. Therefore, direct observation of baryon number violation in these top-quark observables at the TeV scale would imply a large fine-tuning among operators across different energy scales. This possibility is not protected under universal radiative corrections or any known symmetry principles.

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Information

Phys. Rev. D 112, 015026– Published 28 July, 2025
  • Received 6 October 2024
  • Revised 13 March 2025
  • Accepted 9 June 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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