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Some consequences of a Higgs triplet
Paramita Dey, Anirban Kundu and Biswarup Mukhopadhyaya 2009 J. Phys. G: Nucl. Part. Phys. 36 025002 (22pp)   doi: 10.1088/0954-3899/36/2/025002

The decay Z⁰ to H⁰ gamma in the electroweak model with Higgs triplets conserving rho =1

Abstract. In the framework of the model of the electroweak interaction with an extended Higgs sector (including, apart from the standard double, two triplets of Higgs bosons) conserving rho =1, the widths of the decays Z⁰ to H⁰ gamma are calculated, where H⁰ is one of the four Higgs bosons which appear in this model. The calculations are carried out in the parameter region lambda <1 and m₃, m₅>or=50 GeV, where the lambda are constants in the Higgs potential of the model, and m₃ and m₅ are the masses of the charged Higgs bosons in this model. It is found that in this parameter region the decay widths may be significantly enhanced in comparison with the result of the standard model. In particular, in the region of masses m₅>or approximately=50 GeV and lambda approximately 1 the decay widths may exceed the standard result by two orders of magnitude

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