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Search for Doubly Charged Higgs Production at HERA |
| Reference |
E Sauvan, presented at ICHEP2004, Summer 2004 |
| Document |
Conference paper
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| Contact |
B Olivier |
| Abstract |
A search for the single production of doubly-charged Higgs bosons H^{\pm \pm}_{L,R} is performed in the framework of models in which a Higgs triplet is coupled to leptons of the i'th and j'th generation via Yukawa couplings h^{L,R}_{ij}. The signal is searched for via the decays of the doubly-charged Higgs to like-sign electron, muon, or tau pairs or electron-muon pairs, using a sample of e^\pm p events corresponding to up to 118 pb^{-1} of data collected with the H1 detector at HERA for the ee, mu mu, mu e channels and 65 pb^-1 for the tau tau channel. We observe no evidence for doubly-charged Higgs production and derive limits on the h_{ee}^{L,R} and h_{e mu}^{L,R} Yukawa couplings as a function of the H^{\pm\pm}_{L,R} mass. Assuming that the doubly-charged Higgs only decays to electrons, we set a lower limit of about 139 GeV on the H^{\pm\pm}_{L,R} mass for a value h_{ee}^{L,R} = 0.3 corresponding to a coupling of electromagnetic strength. Assuming that the doubly-charged Higgs only decays to electron-muon, we set a lower limit of about 140 GeV on the H^{\pm\pm}_{L,R} mass for a coupling value h_{e\mu}^{L,R} = 0.3. |
| Comments | Update for EPS 2005 : e-tau channel. Mass spectrum; Upper bounds on cross-sections, including the e-tau channel; Constraints on h_e,tau |
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