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A search is presented for long-lived particles with a mass between 25 and 50GeV/c2 and a lifetime between 2 and 500 ps, using proton–proton collision data corresponding to an integrated luminosity of 2.0fb−1, collected by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The particles are assumed to be pair-produced in the decay of a 125GeV/c2 Standard-Model-like Higgs boson.The experimental signature is a single long-lived particle, identiﬁed by a displaced vertex with two associated jets. No excess above background is observed and limits are set on the production cross-section as a function of the mass and lifetime of the long-lived particle.
The LHCb Collaboration (2017). Updated search for long-lived particles decaying to jet pairs. European Physical Journal C: Particles and Fields, 77(812). https://doi.org/10.1140/epjc/s10052-017-5178-x