Speaker
Description
In the standard interaction framework, directly measuring absolute neutrino masses through neutrino oscillations isn't feasible since oscillations rely solely on mass-squared differences. However, the introduction of scalar non-standard interactions can incorporate additional terms in the oscillation Hamiltonian, directly impacting the neutrino mass matrix. This characteristic renders scalar NSI a unique tool for neutrino mass determinations. In this study, for the first time, we set constraints on the absolute masses of neutrinos by probing scalar NSI. We demonstrate that the presence of scalar NSI at DUNE can impose a bound on the lightest neutrino mass. We observe that the tightest constraint on the lightest neutrino mass occurs with $\eta_{\tau\tau}$ and $\eta_{\mu\mu}$ at $2\sigma$ confidence levels for normal and inverted hierarchy, respectively. This analysis suggests that scalar NSI presents an intriguing avenue for constraining absolute neutrino masses in long-baseline neutrino experiments through neutrino oscillations.
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 $\nu$-oscillations, 2307.05348.
| Poster prize | Yes |
|---|---|
| Given name | Abinash |
| Surname | Medhi |
| First affiliation | Indian Institute of Technology Guwahati, Assam, INDIA |
| Second affiliation | Tezpur University, Assam, INDIA |
| Institutional email | abinashmedhi0@gmail.com |
| Gender | Male |
