UC Santa Cruz

A search is performed for heavy long-lived charged particles using 3.0 fb-1$${\rm fb}^{-1}$$ of proton–proton collisions collected at s$$\sqrt{s}$$=$$=$$ 7 and 8  TeV with the LHCb detector. The search is mainly based on the response of the ring imaging Cherenkov detectors to distinguish the heavy, slow-moving particles from muons. No evidence is found for the production of such long-lived states. The results are expressed as limits on the Drell–Yan production of pairs of long-lived particles, with both particles in the LHCb pseudorapidity acceptance, 1.8<η<4.9$$1.8 < \eta < 4.9$$. The mass-dependent cross-section upper limits are in the range 2–4 fb (at 95 % CL) for masses between 14 and 309 GeV/c2$${\mathrm {\,GeV\!/}c^2}$$.