Lawrence Berkeley National Laboratory

A search is presented for long-lived particles with a mass between 25 and 50GeV/c2$$\,\mathrm{GeV}/c^{2}$$ and a lifetime between 2 and 500 ps, using proton–proton collision data corresponding to an integrated luminosity of 2.0fb-1$$\,\mathrm{fb}^{-1}$$, 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$$\,\mathrm{GeV}/c^{2}$$ 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.