Search for long-lived particles decaying to $e^{\pm }{\mu }^{\mp }\nu$

LHCb collaboration, R. Aaij, C. Abellán Beteta +975

Long-lived particles decaying to $e^{\pm }{\mu }^{\mp }\nu$, with masses between 7 and $50$ GeV/c${}^2$ and lifetimes between 2 and $50$ ps, are searched for by looking at displaced vertices co…