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We analyze the next-to-leading order QCD corrections to the production of doubly charged Higgs particles at hadron colliders in extensions of the standard model with Higgs isospin triplets. At both the Fermilab Tevatron and the CERN Large Hadron Collider (LHC), these corrections are found to be moderate in size increasing the cross sections by about 20--30 %. The residual theoretical uncertainties are of the order of 10--15 % which is sufficient for experimental searches for these particles at the Tevatron and LHC.
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Mühlleitner et al. (2003) studied this question.
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