Tag: Physics beyond the Standard Model
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…
Interacting dark energy and dark matter models fit current data
What the study found The study found that two versions of a cosmological model with interacting dark energy and dark matter can fit current observations well. The models use a Gauss–Bonnet-coupled scalar field as dark energy and a fermionic dark matter field, with either an exponential or a power-law scalar potential. Why the authors say…
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…
Scalar leptoquarks help fermionic dark matter evade direct detection
What the study found The study finds that adding scalar leptoquarks to a vector-like lepton dark matter model can change the dark matter candidate so it better avoids direct detection limits. The added interactions can split the neutral dark matter state into two non-degenerate pseudo-Dirac states and enlarge the parameter space that can reproduce the…
Bell nonlocality observed in tau-pair collisions at the LHC
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What the study found The study reports that tau-plus tau-minus pairs produced in proton-proton collisions at the Large Hadron Collider can be analyzed as an entangled two-qubit quantum state, and that Bell nonlocality was observed with high statistical significance. The authors say tau-plus tau-minus is an ideal system for quantum information studies in high-energy collisions.…
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…
Review compares numerical tools for electroweak phase transition analysis
Explore computational tools for analyzing electroweak phase transitions, including effective potential construction, nucleation rates, and thermodynamic parameters essential for gravitational wave.
