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Projected NA62 sensitivity to heavy neutral lepton production in $K^+ o pi^0 e^+ N$ decays | | Jean-Loup Tastet
; Evgueni Goudzovski
; Inar Timiryasov
; Oleg Ruchayskiy
; | | Date: |
26 Aug 2020 | | Abstract: | Heavy neutral leptons (HNLs) appear in many extensions of the Standard Model
of particle physics. In this study, we investigate to which extent the NA62
experiment at CERN could improve the existing bounds on the HNL mixing angle
$|U_e|^2$ by performing a missing mass search in $K^+ o pi^0 e^+ N$ decays
in flight. We show that the limit $|U_e|^2 simeq 2 imes 10^{-6}$ can be
reached with the currently available data in the mass range 125 -- 144 MeV,
which is currently not well covered by direct searches. Future data, together
with a dedicated trigger and/or improvements in rejection of out-of-acceptance
photons, can improve this limit by another order of magnitude. | | Source: | arXiv, 2008.11654 | | Services: | Forum | Review | PDF | Favorites | |
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