https://doi.org/10.1140/epjc/s10052-024-12591-2
Regular Article - Theoretical Physics
Sensitivity prospects for lepton-trijet signals in the 
SMEFT at the LHeC
1
Instituto de Física de Mar del Plata (IFIMAR), CONICET, UNMDP, Funes 3350, 7600, Mar del Plata, Argentina
2
Instituto de Física La Plata (IFLP) CONICET, UNLP, Diagonal 113 e/ 63 y 64, 1900, La Plata, Argentina
3
Instituto de Física, Facultad Ingeniería, Universidad de la República, Julio Herrera y Reissig 565, 11300, Montevideo, Uruguay
4
Instituto de Física de Mar del Plata (IFIMAR) CONICET, UNMDP Departamento de Física, Universidad Nacional de Mar del Plata, Funes 3350, 7600, Mar del Plata, Argentina
5
Instituto de Física, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400, Montevideo, Uruguay
Received:
30
August
2023
Accepted:
20
February
2024
Published online:
28
March
2024
The observation of neutrino oscillations and masses motivates the extension of the standard model with right-handed neutrinos, leading to heavy neutrino states possibly in the electroweak scale, which could be impacted by new high-scale weakly coupled physics. A systematic tool for studying these interactions is the neutrino-extended standard model effective field theory SMEFT. In this work we study the prospects of the future LHeC electron-proton collider to discover or constrain the SMEFT interactions, performing the first dedicated and realistic analysis of the well known lepton-trijet signals, for both the lepton flavor violating 
(LFV) and the lepton number violating 
(LNV) channels, for HNLs masses in the electroweak scale range: 
. The obtained sensitivity prospects show that the LHeC with 
luminosity could be able to probe the scenario of a heavy N and constrain the effective couplings to a region of the parameter space as tight as the bounds that are currently considered for the 
GeV scale masses, with effective couplings of 
for NP scale 
.
© The Author(s) 2024
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Funded by SCOAP3.
