Color octet electron search potential of FCC based e–p colliders

Resonant production of color octet electrons, e ₈, at the FCC based e–p colliders is analyzed. It is shown that e-FCC will cover much a wider region of e ₈ masses compared to the LHC. Moreover, with the highest electron beam energy, the e ₈ search potential of the e-FCC exceeds that of the FCC p–p collider. If e ₈ is discovered earlier by the FCC p–p collider, e-FCC will give an opportunity to handle very important additional information. For example, the compositeness scale can be probed up to the hundreds of TeV region. (paper)