Radiative corrections of heavy scalar decays to gauge bosons in the singlet extension of the Standard Model

Assuming the existence of a new real scalar singlet s 0 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 W + W - ( γ ) , showing that they can give a c...

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Bibliographic Details
Published inThe European physical journal. C, Particles and fields Vol. 78; no. 3; pp. 1 - 13
Main Authors Ria, G., Meloni, D.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2018
Springer
Springer Nature B.V
SpringerOpen
Subjects
Astronomy
Astrophysics and Cosmology
Bosons
Decay rate
Elementary Particles
Hadrons
Heavy Ions
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
String Theory
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Summary:Assuming the existence of a new real scalar singlet s 0 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 W + W - ( γ ) , showing that they can give a contribution as large as O (5%) and O (7%), respectively. We also explicitly analyze in detail their dependence on the heavy mass m S and on the scalar mixing angle α , finding that, especially in the large-mass region, these depend on the sign and the assumed value of sin α .
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-018-5743-y