@Article{Beltran_etal2023,
author="Beltran, R.
and Cottin, G.
and Helo, J. C.
and Hirsch, M.
and Titov, A.
and Wang, Z. S.",
title="Long-lived heavy neutral leptons from mesons in effective field theory",
journal="Journal of High Energy Physics",
year="2023",
publisher="Springer",
volume="01",
number="1",
pages="015--38pp",
optkeywords="New Light Particles; SMEFT; Sterile or Heavy Neutrinos",
abstract="In the framework of the low-energy effective field theory of the Standard Model extended with heavy neutral leptons (HNLs), we calculate the production rates of HNLs from meson decays triggered by dimension-six operators. We consider both lepton number-conserving and lepton-number-violating four-fermion operators involving either a pair of HNLs or a single HNL. Assuming that HNLs are long-lived, we perform simulations and investigate the reach of the proposed far detectors at the high-luminosity LHC to (i) active-heavy neutrino mixing and (ii) the Wilson coefficients associated with the effective operators, for HNL masses below the mass of the B-meson. We further convert the latter to the associated new-physics scales. Our results show that scales in excess of hundreds of TeV and the active-heavy mixing squared as small as 10(-15 )can be probed by these experiments.",
optnote="WOS:000909520000005",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5455), last updated on Fri, 27 Jan 2023 11:38:07 +0000",
issn="1029-8479",
doi="10.1007/JHEP01(2023)015",
opturl="https://arxiv.org/abs/2210.02461",
opturl="https://doi.org/10.1007/JHEP01(2023)015",
language="English"
}