https://doi.org/10.1140/epjc/s10052-018-5743-y
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
* e-mail: gabrieleria@fis.uniroma3.it
Received:
26
October
2017
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
