Sunday 02 February 2025
Physicists have long sought to explain the mysteries of the universe, from the tiny neutrino masses to the origins of dark matter. A new study published in a recent paper offers a promising solution to these puzzles by proposing a novel extension of the Standard Model.
The researchers, led by Shinya Kanemura and Yushi Mura, have developed a model that combines the principles of the Standard Model with those of an additional gauge symmetry, U(1)B−L. This symmetry is responsible for the breaking of the electroweak scale, which is the energy scale at which the electromagnetic force and the weak nuclear force become unified.
In this model, the neutrino masses are generated radiatively through the one-loop induced operator, allowing for a natural explanation of their tiny sizes. The dark matter candidate, N1, is a Z2-odd right-handed neutrino that interacts with the Standard Model particles only through the exchange of the Z′ boson.
The researchers have also studied the prospects for detecting this dark matter candidate at future colliders. They found that the LHC and HL-LHC could potentially reach the gauge coupling gB−L of O(10−2), while lepton colliders like ILC could reach smaller values of O(10−3).
One of the key features of this model is its ability to explain the observed dark matter relic abundance. The researchers used a combination of numerical simulations and analytical calculations to demonstrate that the model can reproduce the observed abundance with high accuracy.
The study also explores the possibility of detecting the Z′ boson at future colliders. They found that the branching ratios for the decays of the Z′ boson into various Standard Model particles are sensitive to the gauge coupling gB−L and could potentially be used as a probe of the model’s parameters.
Overall, this study offers a promising solution to some of the most pressing puzzles in particle physics. By combining the principles of the Standard Model with those of an additional gauge symmetry, the researchers have created a novel model that can explain the tiny neutrino masses and the origins of dark matter. The study also provides valuable insights into the prospects for detecting these particles at future colliders.
Cite this article: “New Model Offers Insights into Neutrino Masses and Dark Matter Origins”, The Science Archive, 2025.
Standard Model, Neutrino Masses, Dark Matter, U(1)B−L Symmetry, Electroweak Scale, Z′ Boson, Lhc, Hl-Lhc, Ilc, Gauge Coupling Gb−L
