The role of final-state interaction modeling in neutrino energy reconstruction and oscillation measurements
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911602321653760 |
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| author | Liu, Yinrui Munteanu, Laura Dolan, Stephen |
| author_facet | Liu, Yinrui Munteanu, Laura Dolan, Stephen |
| contents | We present a quantitative demonstration that, without additional theoretical and experimental efforts, realistic variations in final-state-interaction (FSI) modeling may alter reconstructed neutrino-energy spectra at next-generation long-baseline experiments by amounts comparable to, or larger than, variations induced by oscillation-parameter shifts at their projected precision. Using the DUNE flux and baseline as a case study, we show that these FSI-driven distortions can mimic the effects of changes in the oscillation parameters $Δm^2_{32}$ or $δ_{\rm CP}$, producing a potential degeneracy. Our analysis thereby underscores the urgent need for an improved characterisation of FSI to enable robust constraints from near detectors through the development of theory-driven uncertainty parameterisations benchmarked with dedicated new measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_03964 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The role of final-state interaction modeling in neutrino energy reconstruction and oscillation measurements Liu, Yinrui Munteanu, Laura Dolan, Stephen High Energy Physics - Experiment We present a quantitative demonstration that, without additional theoretical and experimental efforts, realistic variations in final-state-interaction (FSI) modeling may alter reconstructed neutrino-energy spectra at next-generation long-baseline experiments by amounts comparable to, or larger than, variations induced by oscillation-parameter shifts at their projected precision. Using the DUNE flux and baseline as a case study, we show that these FSI-driven distortions can mimic the effects of changes in the oscillation parameters $Δm^2_{32}$ or $δ_{\rm CP}$, producing a potential degeneracy. Our analysis thereby underscores the urgent need for an improved characterisation of FSI to enable robust constraints from near detectors through the development of theory-driven uncertainty parameterisations benchmarked with dedicated new measurements. |
| title | The role of final-state interaction modeling in neutrino energy reconstruction and oscillation measurements |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2511.03964 |