Speaker
Description
In the standard interaction framework, neutrino oscillations are sensitive only to mass-squared differences, making it challenging to directly measure absolute neutrino masses via neutrino oscillation experiments. However, scalar non-standard interactions (SNSI) can introduce sub-dominant terms in the neutrino oscillation Hamiltonian that directly influence the neutrino mass matrix, offering a unique method for probing absolute neutrino masses [1–4]. In this study, we present the constraints on absolute neutrino masses by probing SNSI. We investigate the constraints on the lightest neutrino mass for various values of δCP and θ23 with both normal and inverted neutrino mass hierarchies. Our results indicate that, in the presence of SNSI at DUNE [5], a bound on the neutrino mass can be established, particularly with the parameter ητ τ in normal hierarchy, independent of the octant of θ23 and the CP phase δCP . This work highlights SNSI as a promising avenue for constraining absolute neutrino masses through long-baseline neutrino oscillation experiments [6].
References
[1] S.-F. Ge and S. J. Parke, Scalar Nonstandard Interactions in Neutrino Oscillation, Phys. Rev. Lett. 122 (2019) 211801 [1812.08376].
[2] A. Medhi, D. Dutta and M. M. Devi, Exploring the effects of scalar non standard interactions on the CP violation sensitivity at DUNE, JHEP 06 (2022) 129 [2111.12943].
[3] K. Babu, G. Chauhan and P. Bhupal Dev, Neutrino nonstandard interactions via light scalars in the Earth, Sun, supernovae, and the early Universe, Phys. Rev. D 101 (2020) 095029 [1912.13488].
[4] A. Medhi, M. M. Devi and D. Dutta, Imprints of scalar NSI on the CP-violation sensitivity using synergy among DUNE, T2HK and T2HKK, JHEP 01 (2023) 079 [2209.05287].
[5] DUNE collaboration, Deep Underground Neutrino Experiment (DUNE), Far Detector Technical Design Report, Volume IV Far Detector Single-phase Technology, JINST 15 (2020) T08010 [2002.03010].
[6] A. Medhi, A. Sarker and M. M. Devi, Scalar NSI: A unique tool for constraining absolute neutrino masses via ν-oscillations, 2307.05348.
| Field of contribution | Phenomenology |
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