Regular Article - Theoretical Physics
Radiative corrections of heavy scalar decays to gauge bosons in the singlet extension of the Standard Model
Dipartimento di Matematica e Fisica, Università di Roma Tre, INFN, Sezione di Roma Tre, 00146, Rome, Italy
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Accepted: 19 March 2018
Published online: 29 March 2018
Assuming the existence of a new real scalar singlet coupled to the Standard Model via a scalar quartic portal interaction, we compute the radiative corrections to the decay rates of the heavy scalar mass eigenstate to a couple of gauge bosons ZZ and , showing that they can give a contribution as large as (5%) and (7%), respectively. We also explicitly analyze in detail their dependence on the heavy mass and on the scalar mixing angle , finding that, especially in the large-mass region, these depend on the sign and the assumed value of .
© The Author(s), 2018