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We discuss the phenomenology of doubly and singly charged Higgs bosons [of SU(2)_L-triplet fields] in the simplest A_4-symmetric version of the Higgs triplet model. Mass eigenstates of these Higgs bos...ons are obtained explicitly from the Higgs potential. It is shown that their decays into a pair of leptons have unique flavor structures which can be tested at the LHC if some of their masses are below the TeV scale. Sizable decay rates for τ→¯¯μee and τ→¯eμμ can be obtained naturally, while other τ→¯ℓℓ′ℓ'', μ→¯eee, and ℓ→ℓ′γ, are almost forbidden in this model. Contributions of these Higgs bosons to the nonstandard interactions of neutrinos are also considered.続きを見る
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