A second Higgs from the Higgs portal
By A. Falkowski, C. Gross, O. Lebedev. 2015
180 citations recorded by the source corpus.
A bstractIn the Higgs portal framework, the Higgs field generally mixes with the Standard Model (SM) singlet leading to the existence of two states, one of which is identified with the 125 GeV scalar observed at the LHC. In this work, we analyse direct and indirect constraints on the second mass eigenstate and the corresponding mixing angle. The existence of the additional scalar can be beneficial as it can stabilise the otherwise-metastable electroweak vacuum. We find parameter regions where all of the bounds, including the stability constraints, are satisfied. We also study prospects for observing the decay of the heavier state into a pair of the 125 GeV Higgs-like scalars.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/29f991a3456c0029633381db4584e64c76eeae66
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In Nuclear and High Energy Physics
Citations in the corpus
- The waning of the WIMP? A review of models, searches, and constraints (2017, methodology): “The phenomenology of the mediator sector, thus, can be expressed as functions of the five parameters λh, λΦ, vh, vΦ, λhS or equivalently in terms of m 2 h, m 2 S , vh, sin θ, λhS using the following relations [245]:”
- Phenomenology of a 750 GeV singlet (2015, background): “[45], for a mS = 750 GeV one finds sinα ≤ 0.”
- Dark matter and neutrino masses from a scale-invariant multi-Higgs portal (2015, methodology): “When the Higgs signal strengths from ATLAS and CMS [86–88] are combined [89], one obtains the constraint μh1 > 0.”
- Building and testing models with extended Higgs sectors (2017, background): “e broken phase, with all three mixing scalars. All these scenarios can be explored at the LHC. A similar conclusion for the real singlet extension and at the one-loop level only was obtained later in [379]. Stability up to the Planck scale was well feasible, with the second scalar being moderately h”