A search is presented for long-lived particles
with a mass between 25 and 50 GeV/c2 and a lifetime
between 2 and 500 ps, using proton–proton collision data
corresponding to an integrated luminosity of 2.0 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 125 GeV/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.