2023 Fiscal Year Research-status Report
On SU(5) Grand Unified Models with Extra Symmetries and their Experimental Testability
| Project/Area Number |
22KJ1022
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| Allocation Type | Multi-year Fund |
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| Research Institution | The University of Tokyo |
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Principal Investigator |
HOR ShihWen 東京大学, 理学系研究科, 特別研究員(DC1)
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| Project Period (FY) |
2023-03-08 – 2025-03-31
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| Keywords | Grand unified theories / Supersymmetry / Split doublet-triplet / Proton decays / Nambu-Goldstone Higgs / Additional symmetry |
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| Outline of Annual Research Achievements |
I constructed a SUSY flipped SU(5) GUT model with an R symmetry. The D-T-S problem is solved with the missing partner mechanism. I found that this model predicts a light color-triplet Higgs and it can be tested in the p → π0 μ+ and p → K0 μ+ decay modes.
Interpreting the Higgs doublets as NG Higgs can explain why Higgs is light. I studied the NG Higgs SUSY SU(5) and found that this model suggests the high-scale SUSY scenario.
I have been doing a calculation of proton decays. I calculated them at the low-energy scale and studied their dependence on the UV models.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Some of the original plans have not been completed yet, but I also came up with and studied many new ideas. I am currently studying the dependence of proton decay rate ratios on the UV models, for example, GUT.
I have also been researching on dark matter. We are studying the capture of dark matter using compact stars, such as white dwarfs and neutron stars. The scattering of the dark matter and the standard model particle in the compact stars can change the temperature of the compact stars so that it can become a method to detect dark matter.
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| Strategy for Future Research Activity |
Gauge-Higgs Unification: As suggested by AdS/CFT correspondence, a CFT with an SU(6) global symmetry can correspond to an SU(6) model in 5-dimension. It motivates me to study gauge-Higgs unification in extra-dimensional GUT models with a similar set-up as my previous model.
Pure Realization: In SUSY models, the symmetry breaking will produce NG supermultiplets. In each NG multiplet, there are two degrees of freedom of bosons. There can be either two NG bosons or one NG boson and one quasi-NG boson. I also would like to study the case of two NG bosons, the pure nonlinear realization.
Dark Matter: I would like to study more on other possible DM indirect detections and model building motivated by my previous GUT models.
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