New constraints on the matter potential from global analysis of oscillation data
| Main Author: | Martinez-Soler, Ivan |
|---|---|
| Format: | info Proceeding eJournal |
| Bahasa: | eng |
| Terbitan: |
, 2018
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3464582 |
Daftar Isi:
- The description of the neutrino evolution in matter has become crucial in the determination of most of the remaining uncertainties in the neutrino oscillation framework. Such is the case of the mass ordering or the phase that violates the CP symmetry in the lepton sector. In both cases, the interaction of neutrinos and antineutrinos with the matter determines the measurement of the parameter. In the presence of non-standard interactions (NSI) of the neutrino with the matter, their evolution and therefore the determination of the oscillation parameter will be altered. In this talk, we are going to discuss our knowledge of the size and flavor structure of NSI by a global fit of oscillation data, considering a general neutral current neutrino interaction with quarks. The lepton-flavor structure of the new interactions is independent of the quark type. The results have been obtained using all the available data from oscillation experiments alone and in combination with the results on coherent neutrino-nucleus scattering from the COHERENT experiment. In our analysis we study the robustness of the three neutrino mixing scenario in the presence of NSI, and the LMA-D solution. As a result, we also derive new bounds of the non-standard couplings to up and down quarks. The results obtained are robust under the broad spectrum of up-to-down strengths found in the neutrino propagation along the Sun and the Earth. Presentation given at the Magnificent CEvNS workshop (2018).