PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T04 Neutrino Physics
Constraining the Scalar Non-Standard Interactions in Neutrino Oscillation Experiment
A. Gupta*, S. Prakash and D. Majumdar
Full text: pdf
Pre-published on: January 29, 2024
Published on: March 21, 2024
Neutrinos are unique tools to probe new physics scenarios such as non-standard interactions (NSIs) of neutrinos with matter. The coupling of neutrinos to a scalar field gives rise to a new interaction known as Scalar NSI. Unlike the vector NSI case, which contributes to the usual matter potential, the scalar NSI appears as a correction to the neutrino mass term. In this work, we perform a phenomenological study of neutrino oscillation along with the scalar NSI and its impact on the determination of neutrino mass ordering (NMO) at the JUNO experiment. We find that in the presence of scalar NSI the survival probabilities $P_{\rm ee}$ and $\bar{{P}}_{\rm ee}$ depend upon the $\delta_{\rm CP}$ and octant of $\theta_{23}$, which is not the case, had the scalar NSI been absent in the Hamiltonian. We explore the role of diagonal scalar NSI parameters namely $\eta_{ee}$, $\eta_{\mu\mu}$, and $\eta_{\tau\tau}$
and it is noted that $\eta_{ee}$
significantly affects the mass ordering determination of JUNO. The constraints on such diagonal scalar NSI elements have also been obtained in this work.
DOI: https://doi.org/10.22323/1.449.0170
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