Tag: Higgs boson
Unified framework links CP-violating Higgs parametrisations
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What the study found The study provides a unified framework for relating different ways of describing CP-violating Higgs boson interactions. It also constructs explicit dictionaries to translate between commonly used parametrisations. Why the authors say this matters The authors say this matters because differing conventions and assumptions across the literature make translation between parametrisations nontrivial…
Semi-visible dark jets may be probed at FCC-ee
What the study found The study finds that Higgs-boson-mediated production of dark quarks at the Future Circular Collider in electron-positron collisions could produce semi-visible jets, meaning jets made of both visible and invisible particles. The authors report that a graph neural network jet tagger helps improve sensitivity, especially when the invisible part of the signal…
A4 symmetry gives best match in leptonic 3HDM
What the study found The study found that, in the three-Higgs-doublet model, assigning the Higgs doublets to transform as a flavor triplet under the A4 group reproduces the experimentally observed neutrino mixing angles with arbitrary precision. It also keeps the correct mass ordering for charged leptons and for neutral leptons, which are Dirac neutrinos with…
Machine learning helped identify viable dark matter regions in 2HDM2S
What the study found The study reports that a machine learning-based exploration, using Evolutionary Strategies, was able to efficiently search for regions with a viable dark matter candidate in the 2HDM2S model, a two real scalar singlet extension of the two Higgs doublet model. Why the authors say this matters The authors present this as…
2HDM-I can explain 650 GeV and 95 GeV anomalies
What the study found The authors report that the 2-Higgs Doublet Model Type-I (2HDM-I), a theory with two Higgs boson fields and a softly broken symmetry, can explain the reported 650 GeV and 95 GeV anomalies. Why the authors say this matters The study suggests that these anomalies, seen in Large Hadron Collider (LHC) and…
