2019 Fiscal Year Annual Research Report
Next Generation of Neutrino CP measurement with TNT2K and Its Physical Potentials
| Project/Area Number |
18K13536
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| Research Institution | The University of Tokyo |
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Principal Investigator |
GE SHAOFENG 東京大学, カブリ数物連携宇宙研究機構, 客員准科学研究員 (20817639)
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| Project Period (FY) |
2018-04-01 – 2020-03-31
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| Keywords | Neutrino / Neutrino Oscillation / NonStandard Interactions / CP |
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| Outline of Annual Research Achievements |
In FY2019 I have published one PRL paper Phys.Rev.Lett. 122 (2019) 21, 211801 on the scalar non-standard interactions (NSI) in neutrino oscillation. This paper pointed out that the scalar NSI can have totally different phenomenological consequences than the vector type, contrary to the naive expectation. In addition, I have finished another paper [arXiv:1904.02518 [hep-ph]] to propose the dark NSI in neutrino oscillation. Both scalar & dark NSI leads to mass term correction in the effective Hamiltonian of neutrino oscillation.
I have also published one PLB paper Phys.Lett.B 801 (2020) 135159 for the the broken democratic neutrino mass matrix with intermediate S_2 x S_2 residual symmetry. This approach improves the anarchy model of neutrino mixing with residual symmetries, first S_3 x S_3 and then the intermediate S_2 x S_2.
My fourth paper on neutrino is about the neutrino mass ordering. Currently, global fits of all neutrino experimental data prefer the normal mass ordering. This seems not good for the neutrinoless double beta decay measurement. I point out the opposite and provide two arguments: the normal ordering can allow the neutrinoless double beta decay experiments to exclude the higher octant of theta12 and simultaneously determine the two Majorana CP phases.
All these works are about neutrino and can be related to the TNT2K experiment that is the focus of this project.
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