Search for long-lived particles decaying to jets with displaced vertices in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Bethani, Agni [UCL] Bruno, Giacomo [UCL] Bury, Florian [UCL] Caputo, Claudio [UCL] David, Pieter [UCL] Delaere, Christophe [UCL] Delcourt, Martin [UCL] Donertas, Izzeddin Suat [UCL] Giammanco, Andrea [UCL] Lemaitre, Vincent [UCL] Mondal, Kuntal [UCL] Prisciandaro, Jessica [UCL] Taliercio, Angela [UCL] Teklishyn, Maksym [UCL] Vischia, Pietro [UCL] Wertz, Sébastien [UCL] Wuyckens, Sophie [UCL] et al.

A search is presented for long-lived particles produced in pairs in proton-proton collisions at the LHC operating at a center-of-mass energy of $13\mathrm{TeV}$. The data were collected with the CMS detector during the period from 2015 through 2018, and correspond to a total integrated luminosity of $140{\mathrm{fb}}^{-1}$. This search targets pairs of long-lived particles with mean proper decay lengths between 0.1 and $100\mathrm{mm}$, each of which decays into at least two quarks that hadronize to jets, resulting in a final state with two displaced vertices. No significant excess of events with two displaced vertices is observed. In the context of $R$-parity violating supersymmetry models, the pair production of long-lived neutralinos, gluinos, and top squarks is excluded at 95% confidence level for cross sections larger than 0.08 fb, masses between 800 and 3000 GeV, and mean proper decay lengths between 1 and 25 mm.