Solar parameters in long-baseline accelerator neutrino oscillations
Abstract Long-baseline (LBL) accelerator neutrino oscillation experiments, such as NOvA and T2K in the current generation, and DUNE-LBL and HK-LBL in the coming years, will measure the remaining unknown oscillation parameters with excellent precision. These analyses assume external input on the so-c...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-06-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP06(2023)090 |
| _version_ | 1797675879376093184 |
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| author | Peter B. Denton Julia Gehrlein |
| author_facet | Peter B. Denton Julia Gehrlein |
| author_sort | Peter B. Denton |
| collection | DOAJ |
| description | Abstract Long-baseline (LBL) accelerator neutrino oscillation experiments, such as NOvA and T2K in the current generation, and DUNE-LBL and HK-LBL in the coming years, will measure the remaining unknown oscillation parameters with excellent precision. These analyses assume external input on the so-called “solar parameters,” θ 12 and ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ , from solar experiments such as SNO, SK, and Borexino, as well as reactor experiments like KamLAND. Here we investigate their role in long-baseline experiments. We show that, without external input on ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ and θ 12, the sensitivity to detecting and quantifying CP violation is significantly, but not entirely, reduced. Thus long-baseline accelerator experiments can actually determine ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ and θ 12, and thus all six oscillation parameters, without input from any other oscillation experiment. In particular, ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ can be determined; thus DUNE-LBL and HK-LBL can measure both the solar and atmospheric mass splittings in their long-baseline analyses alone. While their sensitivities are not competitive with existing constraints, they are very orthogonal probes of solar parameters and provide a key consistency check of a less probed sector of the three-flavor oscillation picture. Furthermore, we also show that the true values of ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ and θ 12 play an important role in the sensitivity of other oscillation parameters such as the CP violating phase δ. |
| first_indexed | 2024-03-11T22:20:00Z |
| format | Article |
| id | doaj.art-7732cb8f5cec4c67863fe23aa9112a71 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-11T22:20:00Z |
| publishDate | 2023-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-7732cb8f5cec4c67863fe23aa9112a712023-09-24T11:06:32ZengSpringerOpenJournal of High Energy Physics1029-84792023-06-012023613010.1007/JHEP06(2023)090Solar parameters in long-baseline accelerator neutrino oscillationsPeter B. Denton0Julia Gehrlein1High Energy Theory Group, Physics Department, Brookhaven National LaboratoryTheoretical Physics Department, CERNAbstract Long-baseline (LBL) accelerator neutrino oscillation experiments, such as NOvA and T2K in the current generation, and DUNE-LBL and HK-LBL in the coming years, will measure the remaining unknown oscillation parameters with excellent precision. These analyses assume external input on the so-called “solar parameters,” θ 12 and ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ , from solar experiments such as SNO, SK, and Borexino, as well as reactor experiments like KamLAND. Here we investigate their role in long-baseline experiments. We show that, without external input on ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ and θ 12, the sensitivity to detecting and quantifying CP violation is significantly, but not entirely, reduced. Thus long-baseline accelerator experiments can actually determine ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ and θ 12, and thus all six oscillation parameters, without input from any other oscillation experiment. In particular, ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ can be determined; thus DUNE-LBL and HK-LBL can measure both the solar and atmospheric mass splittings in their long-baseline analyses alone. While their sensitivities are not competitive with existing constraints, they are very orthogonal probes of solar parameters and provide a key consistency check of a less probed sector of the three-flavor oscillation picture. Furthermore, we also show that the true values of ∆ m 21 2 $$ \Delta {m}_{21}^2 $$ and θ 12 play an important role in the sensitivity of other oscillation parameters such as the CP violating phase δ.https://doi.org/10.1007/JHEP06(2023)090CP ViolationNeutrino Mixing |
| spellingShingle | Peter B. Denton Julia Gehrlein Solar parameters in long-baseline accelerator neutrino oscillations Journal of High Energy Physics CP Violation Neutrino Mixing |
| title | Solar parameters in long-baseline accelerator neutrino oscillations |
| title_full | Solar parameters in long-baseline accelerator neutrino oscillations |
| title_fullStr | Solar parameters in long-baseline accelerator neutrino oscillations |
| title_full_unstemmed | Solar parameters in long-baseline accelerator neutrino oscillations |
| title_short | Solar parameters in long-baseline accelerator neutrino oscillations |
| title_sort | solar parameters in long baseline accelerator neutrino oscillations |
| topic | CP Violation Neutrino Mixing |
| url | https://doi.org/10.1007/JHEP06(2023)090 |
| work_keys_str_mv | AT peterbdenton solarparametersinlongbaselineacceleratorneutrinooscillations AT juliagehrlein solarparametersinlongbaselineacceleratorneutrinooscillations |