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.

• Received 27 April 2021
• Accepted 3 August 2021

DOI:https://doi.org/10.1103/PhysRevD.104.052011

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