scholarly journals An operator basis for the Standard Model with an added scalar singlet

2016 ◽  
Vol 2016 (8) ◽  
Author(s):  
Ben Gripaios ◽  
Dave Sutherland
Keyword(s):  
Standard Model ◽  
The Standard Model ◽  
Scalar Singlet

scholarly journals Constraining extended scalar sectors at the LHC and beyond

2018 ◽  
Vol 33 (10n11) ◽  
pp. 1830007 ◽  
Author(s):  
Agnieszka Ilnicka ◽  
Tania Robens ◽  
Tim Stefaniak
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Standard Model ◽  
Parameter Space ◽  
Beyond The Standard Model ◽  
The Standard Model ◽  
Doublet Model ◽  
Inert Doublet Model ◽  
Scalar Sector ◽  
Scalar Singlet

We give a brief overview of beyond the Standard Model (BSM) theories with an extended scalar sector and their phenomenological status in the light of recent experimental results. We discuss the relevant theoretical and experimental constraints, and show their impact on the allowed parameter space of two specific models: the real scalar singlet extension of the Standard Model (SM) and the Inert Doublet Model. We emphasize the importance of the LHC measurements, both the direct searches for additional scalar bosons, as well as the precise measurements of properties of the Higgs boson of mass 125 GeV. We show the complementarity of these measurements to electroweak and dark matter observables.

scholarly journals Multiple-point principle with a scalar singlet extension of the standard model

2017 ◽  
Vol 2017 (1) ◽  
pp. 013B03 ◽  
Author(s):  
Naoyuki Haba ◽  
Hiroyuki Ishida ◽  
Nobuchika Okada ◽  
Yuya Yamaguchi
Keyword(s):  
Standard Model ◽  
Multiple Point ◽  
The Standard Model ◽  
Scalar Singlet

scholarly journals Phase transition in multi-scalar-singlet extensions of the Standard Model

2015 ◽  
Vol 748 ◽  
pp. 208-211 ◽  
Author(s):  
A. Tofighi ◽  
O.N. Ghodsi ◽  
M. Saeedhoseini
Keyword(s):  
Phase Transition ◽  
Standard Model ◽  
The Standard Model ◽  
Scalar Singlet

scholarly journals Collider searches for scalar singlets across lifetimes

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Elina Fuchs ◽  
Oleksii Matsedonskyi ◽  
Inbar Savoray ◽  
Matthias Schlaffer
Keyword(s):  
Standard Model ◽  
Parameter Space ◽  
Large Range ◽  
Search Strategies ◽  
Natural Parameter ◽  
Lepton Colliders ◽  
The Standard Model ◽  
Invisible Decays ◽  
Scalar Singlet

Abstract Spin-0 singlets arise in well-motivated extensions of the Standard Model. Their lifetime determines the best search strategies at hadron and lepton colliders. To cover a large range of singlet decay lengths, we investigate bounds from Higgs decays into a pair of singlets, considering signatures of invisible decays, displaced and delayed jets, and coupling fits of untagged decays. We examine the generic scalar singlet and the relaxion, and derive a matching as well as qualitative differences between them. For each model, we discuss its natural parameter space and the searches probing it.

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