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Medientyp:
E-Artikel
Titel:
Long-lived sterile neutrinos at Belle II in effective field theory
Beteiligte:
Zhou, Guanghui;
Günther, Julian Y.;
Wang, Zeren Simon;
de Vries, Jordy;
Dreiner, Herbi K.
Erschienen:
Springer Science and Business Media LLC, 2022
Erschienen in:
Journal of High Energy Physics, 2022 (2022) 4
Sprache:
Englisch
DOI:
10.1007/jhep04(2022)057
ISSN:
1029-8479
Entstehung:
Hochschulschrift:
Anmerkungen:
Beschreibung:
<jats:title>A<jats:sc>bstract</jats:sc>
</jats:title><jats:p>Large numbers of <jats:italic>τ</jats:italic> leptons are produced at Belle II. These could potentially decay into sterile neutrinos that, for the mass range under consideration, are typically long-lived, leading to displaced-vertex signatures. Here, we study a displaced-vertex search in the context of the sterile-neutrino-extended Standard Model Effective Field Theory. The production and decay of the sterile neutrinos can be realized via either the standard active-sterile neutrino mixing or higher-dimensional operators in the effective Lagrangian. We perform Monte-Carlo simulations to estimate the Belle II sensitivities to such interactions. We find that Belle II can probe non-renormalizable dimension-six operators involving a single sterile neutrino up to a few TeV in the new-physics scale.</jats:p>