PRISM multi-angle measurements in DUNE restore sensitivity to non-unitarity and sterile neutrinos in electron and muon sectors to levels achievable with small spectral uncertainties, with only marginal gains for tau neutrinos.
Left-Right Symmetry Breaking in NJL Approach
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abstract
We study left-right symmetric models which contain only fermion and gauge boson fields and no elementary scalars. The Higgs bosons are generated dynamically through a set of gauge- and parity-invariant 4-fermion operators. It is shown that in a model with a composite bi-doublet and two triplet scalars there is no parity breaking at low energies, whereas in the model with two doublets instead of two triplets parity is broken automatically regardless of the choice of the parameters of the model. For phenomenologically allowed values of the right-handed scale a tumbling symmetry breaking mechanism is realized in which parity breaking at a high scale $\mu_R$ propagates down and eventually causes the \EW symmetry breaking at the scale $\mu_{EW}\sim 100~GeV$. The model exhibits a number of low and intermediate mass Higgs bosons with certain relations between their masses. In particular, the components of the $SU(2)_L$ Higgs doublet $\chi_L$ are pseudo--\GBs of an accidental (approximate) $SU(4)$ symmetry of the Higgs potential and therefore are expected to be relatively light.
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representative citing papers
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Sharpening New Physics Searches in Neutrino Oscillations with DUNE-PRISM
PRISM multi-angle measurements in DUNE restore sensitivity to non-unitarity and sterile neutrinos in electron and muon sectors to levels achievable with small spectral uncertainties, with only marginal gains for tau neutrinos.
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Long-lived sterile neutrinos from axionlike particles at the Super Tau-Charm Facility
STCF can reach |V_eN|^2 values one to two orders of magnitude below current bounds for heavy neutral leptons via displaced-vertex searches from ALP decays in D-meson production.
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Future Circular Collider Feasibility Study Report: Volume 1, Physics, Experiments, Detectors
The FCC feasibility study describes how a staged electron-positron and hadron collider could deliver precision measurements on the Higgs, electroweak bosons, and top quark while searching for physics beyond the Standard Model.