$ν_μ$ and $ν_τ$ elastic scattering in Borexino
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909241075302400 |
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| author | Kelly, Kevin J. Mishra, Nityasa Rai, Mudit Strigari, Louis E. |
| author_facet | Kelly, Kevin J. Mishra, Nityasa Rai, Mudit Strigari, Louis E. |
| contents | We perform a detailed study of neutrino-electron elastic scattering using the mono-energetic $^{7}$Be neutrinos in Borexino, with an emphasis on exploring the differences between the contributions of $ν_e$, $ν_μ$, and $ν_τ$. We find that current data are capable of measuring these components such that the contributions from $ν_μ$ and $ν_τ$ cannot be zero, although distinguishing between them is challenging -- the differences stemming from Standard Model radiative corrections are insufficient without significantly more precise measurements. In studying these components, we compare predicted neutrino-electron scattering event rates within the Standard Model (accounting for neutrino oscillations), as well as going beyond the Standard Model in two ways. We allow for non-unitary evolution to modify neutrino oscillations, and find that with a larger exposure (${\sim}30$x), Borexino may provide relevant information for constraining non-unitarity, and that JUNO may be able to accomplish this with its data collection of $^{7}$Be neutrinos. We also consider novel $ν_μ$- and $ν_τ$-electron scattering from a gauged $U(1)_{L_μ- L_τ}$ model, showing consistency with previous analyses of Borexino and this scenario, but also demonstrating the impact of uncertainties on Standard Model mixing parameters on these results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_03174 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | $ν_μ$ and $ν_τ$ elastic scattering in Borexino Kelly, Kevin J. Mishra, Nityasa Rai, Mudit Strigari, Louis E. High Energy Physics - Phenomenology Solar and Stellar Astrophysics High Energy Physics - Experiment We perform a detailed study of neutrino-electron elastic scattering using the mono-energetic $^{7}$Be neutrinos in Borexino, with an emphasis on exploring the differences between the contributions of $ν_e$, $ν_μ$, and $ν_τ$. We find that current data are capable of measuring these components such that the contributions from $ν_μ$ and $ν_τ$ cannot be zero, although distinguishing between them is challenging -- the differences stemming from Standard Model radiative corrections are insufficient without significantly more precise measurements. In studying these components, we compare predicted neutrino-electron scattering event rates within the Standard Model (accounting for neutrino oscillations), as well as going beyond the Standard Model in two ways. We allow for non-unitary evolution to modify neutrino oscillations, and find that with a larger exposure (${\sim}30$x), Borexino may provide relevant information for constraining non-unitarity, and that JUNO may be able to accomplish this with its data collection of $^{7}$Be neutrinos. We also consider novel $ν_μ$- and $ν_τ$-electron scattering from a gauged $U(1)_{L_μ- L_τ}$ model, showing consistency with previous analyses of Borexino and this scenario, but also demonstrating the impact of uncertainties on Standard Model mixing parameters on these results. |
| title | $ν_μ$ and $ν_τ$ elastic scattering in Borexino |
| topic | High Energy Physics - Phenomenology Solar and Stellar Astrophysics High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2407.03174 |