Hunt for rare processes and long-lived particles at FCC-ee Marcin Chrzaszcz, Rebeca Gonzalez Suarez and Stéphane Monteil Eur. Phys. J. Plus, 136 10 (2021) 1056 Published online: 20 October 2021 DOI: 10.1140/epjp/s13360-021-01961-4