Publications associated with TORCH

Updated search for long-lived particles decaying to jet pairs

European Physical Journal C Springer 77 (2017) 812-

R Aaij, B Adeva, M Adinolfi, T Evans, P Gandini, BR Gruberg Cazon, T Hadavizadeh, N Harnew, PG Jalocha, D Hill, MJJ John, NP Jurik, AK Nandi, S Malde, A Rollings, S Topp-Jorgenson, GR Wilkinson

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.

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