On resonance search in dilepton events at the LHC
Abstract
The main distribution for a bump search is the dilepton invariant mass distribution with appropriated cut on an absolute value of pseudorapidity difference Deltaeta = |eta1 - eta2| between the two leptons. The background from the Standard Model Drell-Yan process contributes mainly to the central pseudorapidity region Deltaeta = 0. By contrast, the excited bosons lead to a peak at Deltaeta = 1.76. We show that this property allows to enhance the significance of their bump search by means of new cut optimization. Nevertheless, in order to confirm an observation of the bump and reveal the resonance nature other angular distributions should be used in addition.
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