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Search for doubly charged Higgs production at HERA |
| Reference |
J Dingfelder, to be presented at ICHEP 2002, July 2002 |
| Document |
Conference paper
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| Contact |
B Olivier, E Perez, Y Sirois |
| Abstract |
A search for the single production of doubly-charged Higgs bosons (H^{\pm\pm}) is performed in the framework of models where a Higgs triplet is coupled to leptons of the ith generation via Yukawa couplings h_{ii}. The search is motivated by the observation of a few multi-electron events with a large di-electron mass, in a domain where the Standard Model expectation is small. The signal is searched for in decay modes of the H^{\pm\pm} to either electrons or muons, using a sample of e^{\pm}p events corresponding up to 115.2 pb-1 of data collected with the H1 detector at HERA. Only one of the multi-electron events is found to be compatible with the hypothesis of the decay of a heavy Higgs boson. Assuming that the doubly-charged Higgs only decays to electrons, we set a lower limit of about 131 GeV on the H^{\pm\pm} mass for a value h_{ee} = 0.3 of the coupling, which corresponds to an interaction of electromagnetic strength. This is the first search for doubly-charged Higgs production at HERA. |
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