Improved precision on 2–3 oscillation parameters using the synergy between DUNE and T2HK
Abstract A high-precision measurement of ∆ m 31 2 $$ \Delta {m}_{31}^2 $$ and θ 23 is inevitable to estimate the Earth’s matter effect in long-baseline experiments which in turn plays an important role in addressing the issue of neutrino mass ordering and to measure the value of CP phase in 3ν frame...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-10-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP10(2024)243 |
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| author | Sanjib Kumar Agarwalla Ritam Kundu Masoom Singh |
| author_facet | Sanjib Kumar Agarwalla Ritam Kundu Masoom Singh |
| author_sort | Sanjib Kumar Agarwalla |
| collection | DOAJ |
| description | Abstract A high-precision measurement of ∆ m 31 2 $$ \Delta {m}_{31}^2 $$ and θ 23 is inevitable to estimate the Earth’s matter effect in long-baseline experiments which in turn plays an important role in addressing the issue of neutrino mass ordering and to measure the value of CP phase in 3ν framework. After reviewing the results from the past and present experiments, and discussing the near-future sensitivities from the IceCube Upgrade and KM3NeT/ORCA, we study the expected improvements in the precision of 2–3 oscillation parameters that the next-generation long-baseline experiments, DUNE and T2HK, can bring either in isolation or combination. We highlight the relevance of the possible complementarities between these two experiments in obtaining the improved sensitivities in determining the deviation from maximal mixing of θ 23, excluding the wrong-octant solution of θ 23, and obtaining high precision on 2–3 oscillation parameters, as compared to their individual performances. We observe that for the current best-fit values of the oscillation parameters and assuming normal mass ordering (NMO), DUNE + T2HK can establish the non-maximal θ 23 and exclude the wrong octant solution of θ 23 at around 7σ C.L. with their nominal exposures. We find that DUNE + T2HK can improve the current relative 1σ precision on sin2 θ 23 ∆ m 31 2 $$ \left(\Delta {m}_{31}^2\right) $$ by a factor of 7 (5) assuming NMO. Also, we notice that with less than half of their nominal exposures, the combination of DUNE and T2HK can achieve the sensitivities that are expected from these individual experiments using their full exposures. We also portray how the synergy between DUNE and T2HK can provide better constraints on (sin2 θ 23–δ CP) plane as compared to their individual reach. |
| format | Article |
| id | doaj-art-7c76092daf2546c4a4b1fa11c0fe12b0 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-7c76092daf2546c4a4b1fa11c0fe12b02024-12-08T12:13:05ZengSpringerOpenJournal of High Energy Physics1029-84792024-10-0120241012810.1007/JHEP10(2024)243Improved precision on 2–3 oscillation parameters using the synergy between DUNE and T2HKSanjib Kumar Agarwalla0Ritam Kundu1Masoom Singh2Institute of Physics, Sachivalaya Marg, Sainik School PostInstitute of Physics, Sachivalaya Marg, Sainik School PostInstitute of Physics, Sachivalaya Marg, Sainik School PostAbstract A high-precision measurement of ∆ m 31 2 $$ \Delta {m}_{31}^2 $$ and θ 23 is inevitable to estimate the Earth’s matter effect in long-baseline experiments which in turn plays an important role in addressing the issue of neutrino mass ordering and to measure the value of CP phase in 3ν framework. After reviewing the results from the past and present experiments, and discussing the near-future sensitivities from the IceCube Upgrade and KM3NeT/ORCA, we study the expected improvements in the precision of 2–3 oscillation parameters that the next-generation long-baseline experiments, DUNE and T2HK, can bring either in isolation or combination. We highlight the relevance of the possible complementarities between these two experiments in obtaining the improved sensitivities in determining the deviation from maximal mixing of θ 23, excluding the wrong-octant solution of θ 23, and obtaining high precision on 2–3 oscillation parameters, as compared to their individual performances. We observe that for the current best-fit values of the oscillation parameters and assuming normal mass ordering (NMO), DUNE + T2HK can establish the non-maximal θ 23 and exclude the wrong octant solution of θ 23 at around 7σ C.L. with their nominal exposures. We find that DUNE + T2HK can improve the current relative 1σ precision on sin2 θ 23 ∆ m 31 2 $$ \left(\Delta {m}_{31}^2\right) $$ by a factor of 7 (5) assuming NMO. Also, we notice that with less than half of their nominal exposures, the combination of DUNE and T2HK can achieve the sensitivities that are expected from these individual experiments using their full exposures. We also portray how the synergy between DUNE and T2HK can provide better constraints on (sin2 θ 23–δ CP) plane as compared to their individual reach.https://doi.org/10.1007/JHEP10(2024)243Neutrino MixingNeutrino Interactions |
| spellingShingle | Sanjib Kumar Agarwalla Ritam Kundu Masoom Singh Improved precision on 2–3 oscillation parameters using the synergy between DUNE and T2HK Journal of High Energy Physics Neutrino Mixing Neutrino Interactions |
| title | Improved precision on 2–3 oscillation parameters using the synergy between DUNE and T2HK |
| title_full | Improved precision on 2–3 oscillation parameters using the synergy between DUNE and T2HK |
| title_fullStr | Improved precision on 2–3 oscillation parameters using the synergy between DUNE and T2HK |
| title_full_unstemmed | Improved precision on 2–3 oscillation parameters using the synergy between DUNE and T2HK |
| title_short | Improved precision on 2–3 oscillation parameters using the synergy between DUNE and T2HK |
| title_sort | improved precision on 2 3 oscillation parameters using the synergy between dune and t2hk |
| topic | Neutrino Mixing Neutrino Interactions |
| url | https://doi.org/10.1007/JHEP10(2024)243 |
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