Neutrino oscillation measurements with KamLAND and JUNO in the presence of scalar NSI
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866912482118860800 |
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| author | Gupta, Aman Majumdar, Debasish Prakash, Suprabh |
| author_facet | Gupta, Aman Majumdar, Debasish Prakash, Suprabh |
| contents | Determination of neutrino mass ordering and precision measurement of neutrino oscillation parameters are the foremost goals of the JUNO experiment. Here, we explore the effects of scalar non-standard interactions (sNSI) on the electron anti-neutrino survival probability measured by JUNO. sNSI appear as corrections to the neutrino mass term in the Hamiltonian. We have considered the simplest scenario where there is only one NSI ($η_{ee}$) present in the theory. Our results show that sNSI can have a significant effect on neutrino oscillation probabilities at the medium- and long-baseline reactor experiments. We fit KamLAND data assuming non-zero sNSI in theory and find that {\it estimates of $Δm^2_{21}$ and $θ_{12}$ from KamLAND deviate significantly from their standard best-fit values} if one assumes sNSI in the theory. $η_{ee} \in [-1.0, 1.0]$ is allowed by KamLAND. JUNO cannot constrain sNSI but it can robustly measure $Δm^2_{21}$ and $θ_{12}$ even when they differ widely from their current best-fit values. {\it Our work highlights the necessity of global analysis of constraints on sNSI and standard two-flavour oscillation parameters before arduous three-flavour questions such as neutrino mass ordering or CP violation in their presence are attempted. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_07343 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Neutrino oscillation measurements with KamLAND and JUNO in the presence of scalar NSI Gupta, Aman Majumdar, Debasish Prakash, Suprabh High Energy Physics - Phenomenology Determination of neutrino mass ordering and precision measurement of neutrino oscillation parameters are the foremost goals of the JUNO experiment. Here, we explore the effects of scalar non-standard interactions (sNSI) on the electron anti-neutrino survival probability measured by JUNO. sNSI appear as corrections to the neutrino mass term in the Hamiltonian. We have considered the simplest scenario where there is only one NSI ($η_{ee}$) present in the theory. Our results show that sNSI can have a significant effect on neutrino oscillation probabilities at the medium- and long-baseline reactor experiments. We fit KamLAND data assuming non-zero sNSI in theory and find that {\it estimates of $Δm^2_{21}$ and $θ_{12}$ from KamLAND deviate significantly from their standard best-fit values} if one assumes sNSI in the theory. $η_{ee} \in [-1.0, 1.0]$ is allowed by KamLAND. JUNO cannot constrain sNSI but it can robustly measure $Δm^2_{21}$ and $θ_{12}$ even when they differ widely from their current best-fit values. {\it Our work highlights the necessity of global analysis of constraints on sNSI and standard two-flavour oscillation parameters before arduous three-flavour questions such as neutrino mass ordering or CP violation in their presence are attempted. |
| title | Neutrino oscillation measurements with KamLAND and JUNO in the presence of scalar NSI |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2306.07343 |