A short overview on low mass scalars at future lepton colliders

Robens, Tania

doi:10.48550/arxiv.2205.09687

Cited by 1 publication

(1 citation statement)

References 37 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both methods lead to a surviving parameter region at 99% CL. This surviving parameter region has significant Higgs coupling modifications which can be decisively tested at the HL-LHC and a light custodial singlet (below 200 GeV) which can be searched for at future lepton colliders [152][153][154].…”

Section: Introductionmentioning

confidence: 99%

Exploring New Frontiers in Particle Physics: Extended Higgs Sectors, Dark Matter, and Neutrino Masses

de Lima

View full text Add to dashboard Cite

This thesis explores four research projects in particle physics that aims in enhancing our understanding of the universe's fundamental particles and forces.The first part examines the Georgi-Machacek (GM) model, which expands the Standard Model (SM) scalar sector by including two SU (2) L triplets. We conduct a comprehensive analysis of the experimental status of this model. Our findings establish an experimental lower limit on the triplet vacuum expectation value that affects deviations from the SM in the Higgs boson's tree-level couplings.The second part explores breaking CP in a dark sector consisting of SM gauge singlets. We conduct a two-loop calculation in the effective theory, with the dark sector interacting with the SM sector via a vector Z portal and Higgs portal. Our findings demonstrate that collider constraints from B-factories exclude feasible baryogenesis for Z masses under 10 GeV. Additionally, future electron-positron Higgs factories may test the viable baryogenesis parameter space.The third part examines the Sommerfeld enhancement for scattering amplitudes. We create a straightforward method to remove divergences in the narrowwidth approximation, which applies in the near-threshold region and considers only the resonant contribution. Our approach offers a good approximation for the exact outcome and has the potential for exploring dark matter models featuring unstable states.Lastly, we investigate generating neutrino masses from the gravitational θ anomaly.The neutrino condensate's primary renormalizable interactions restrict the possibility of producing hierarchical masses compatible with observation, even when accounting for SM loop corrections. Higher-dimensional operators can alleviate this issue. We examine the potential of new particles to create neutrino mass splittings. Our findi nism was computed by Dr. Yue Zhang.

show abstract

Section: Introductionmentioning

confidence: 99%

Exploring New Frontiers in Particle Physics: Extended Higgs Sectors, Dark Matter, and Neutrino Masses

de Lima

View full text Add to dashboard Cite

show abstract

A short overview on low mass scalars at future lepton colliders

Cited by 1 publication

References 37 publications

Exploring New Frontiers in Particle Physics: Extended Higgs Sectors, Dark Matter, and Neutrino Masses

Exploring New Frontiers in Particle Physics: Extended Higgs Sectors, Dark Matter, and Neutrino Masses

Contact Info

Product

Resources

About