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Leptoquark Single and Pair production at LHC with CalcHEP/CompHEP in the complete model

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arxiv hep-ph/0502067 v1 pith:BAMJYNEL submitted 2005-02-07 hep-ph

classification hep-ph
keywords productionsinglepairsignalcalchepcombinedcomphepcoupling
verification ladder T0 review T1 audit T2 compute T3 formal
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We study combined leptoquark (LQ) single and pair production at LHC at the level of detector simulation. A set of kinematical cuts has been worked out to maximize significance for combined signal events. It was shown that combination of signatures from LQ single and pair production not only significantly increases the LHC reach, but also allows us to give the correct signal interpretation. In particular, it was found that the LHC has potential to discover LQ with a mass up to 1.2 TeV and 1.5 TeV for the case of scalar and vector LQ, respectively, and LQ single production contributes 30-50% to the total signal rate for LQ-l-q coupling, taken equal to the electromagnetic coupling. This work is based on implementation of the most general form of scalar and vector LQ interactions with quarks and gluons into CalcHEP/CompHEP packages. This implementation, which authors made publicly available, was one the most important aspects of the study.

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