%0 Journal Article
%T Long-lived heavy neutral leptons from mesons in effective field theory
%A Beltran, R.
%A Cottin, G.
%A Helo, J. C.
%A Hirsch, M.
%A Titov, A.
%A Wang, Z. S.
%J Journal of High Energy Physics
%D 2023
%V 01
%N 1
%I Springer
%@ 1029-8479
%G English
%F Beltran_etal2023
%O WOS:000909520000005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5455), last updated on Fri, 27 Jan 2023 11:38:07 +0000
%X 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.
%K New Light Particles
%K SMEFT
%K Sterile or Heavy Neutrinos
%R 10.1007/JHEP01(2023)015
%U https://arxiv.org/abs/2210.02461
%U https://doi.org/10.1007/JHEP01(2023)015
%P 015-38pp