Abstract
We investigate the effect on neutrino oscillations generated by beyond-the-standard-model interactions between neutrinos and matter. Specifically, we focus on scalar-mediated non-standard interactions (NSI) whose impact fundamentally differs from that of vector-mediated NSI. Scalar NSI contribute as corrections to the neutrino mass matrix rather than the matter potential and thereby predict distinct phenomenology from the vector-mediated ones. Similar to vector-type NSI, the presence of scalar-mediated neutrino NSI can influence measurements of oscillation parameters in long-baseline neutrino oscillation experiments, with a notable impact on CP measurement in the case of DUNE. Our study focuses on the effect of scalar NSI on neutrino oscillations, using DUNE as an example. We introduce a model-independent parameterization procedure that enables the examination of the impact of all non-zero scalar NSI parameters simultaneously. Subsequently, we convert DUNE’s sensitivity to the NSI parameters into projected sensitivity concerning the parameters of a light scalar model. We compare these results with existing non-oscillation probes. Our findings reveal that the region of the light scalar parameter space sensitive to DUNE is predominantly excluded by non-oscillation probes, especially when considering all nonzero parameters simultaneously for DUNE.
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Acknowledgments
B.D., A.T., K.J.K. and A.V. receive partial support from DOE grant DE-SC0010813. S.G.’s work is funded by the National Research Foundation of Korea (NRF) Grant No. NRF-2019R1A2C3005009 (SG). T.L. acknowledges support from the National Key Research and Development Program of China Grant No. 2020YFC2201504, by the Projects No. 11875062, No. 11947302, No. 12047503, and No. 12275333 supported by the National Natural Science Foundation of China, as well as the Key Research Program of the Chinese Academy of Sciences, Grant NO. XDPB15. We also recognize that portions of this research were conducted using the advanced computing resources provided by Texas A&M High Performance Research Computing.
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Dutta, B., Ghosh, S., Kelly, K.J. et al. Non-standard neutrino interactions mediated by a light scalar at DUNE. J. High Energ. Phys. 2024, 213 (2024). https://doi.org/10.1007/JHEP07(2024)213
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DOI: https://doi.org/10.1007/JHEP07(2024)213