A search is performed for heavy long-lived charged particles using 3.0
fb$^{-1}$ of pp collisions collected at $sqrt{s}$= 7 and 8 TeV with the LHCb
detector. The search is mainly based on the response of the ring imaging
Cherenkovdetectors 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, $1.8 <
eta < 4.9$. The mass-dependent cross-section upper limits are in the range 2-4
fb (at 95\% CL) for masses between 124 and 309 GeV/c$^2$.
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