The production potential of the excited neutrinos at the FCC-based
electron-hadron colliders, namely the ERL60⊗FCC with s​=3.46
TeV, the ILC⊗FCC with s​=10 TeV, and the PWFA-LC⊗FCC
with s​=31.6 TeV, has been analyzed. The branching ratios of the
excited neutrinos have been calculated for the different decay channels and
shown that the dominant channel is ν⋆→eW+. We have
calculated the production cross sections with the process of
ep→ν⋆q→eW+q and the decay widths of the
excited neutrinos with the process of ν⋆→eW+. The
signals and corresponding backgrounds are studied in detail to obtain
accessible mass limits. It is shown that the discovery limits obtained on the
mass of the excited neutrino are 2452 GeV for Lint​=100fb−1, 5635
GeV for Lint​=10fb−1 (6460 GeV for Lint​=100fb−1), and
10200 GeV for Lint​=1fb−1 (13960 GeV for Lint​=10fb−1),
for the center-of-mass energies of 3.46, 10, and 31.6 TeV, respectively.Comment: 16 pages, 9 figures, 5 table