Feasibility Study of Measuring $Λ^0\to nπ^{0}$ Using a High-Granularity Zero-Degree Calorimeter at the Future Electron-Ion Collider
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| Format: | Preprint |
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2024
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| author | Paul, Sebouh J. Milton, Ryan Morán, Sebastián Schmookler, Barak Arratia, Miguel |
| author_facet | Paul, Sebouh J. Milton, Ryan Morán, Sebastián Schmookler, Barak Arratia, Miguel |
| contents | Key measurements at the future Electron-Ion Collider (EIC), including first-of-their-kind studies of kaon structure, require the detection of $Λ^0$ at forward angles. We present a feasibility study of $Λ^0 \to nπ^0$ measurements using a high-granularity Zero Degree Calorimeter to be located about 35 m from the interaction point. We introduce a method to address the unprecedented challenge of identifying $Λ^0$s with energy $O(100)$ GeV that produce displaced vertices of $O(10)$ m. In addition, we present a reconstruction approach using graph neural networks. We find that the energy and angle resolution for $Λ^0$ is similar to that for neutrons, both of which meet the requirements outlined in the EIC Yellow Report.Furthermore, we estimate performance for measuring the neutron's direction in the $Λ^0$ rest frame, which reflects the $Λ^0$ spin polarization. We estimate that the neutral-decay channel $Λ^0 \to nπ^0$ will greatly extend the measurable energy range for the charged-decay channel $Λ^0 \to pπ^-$, which is limited by the location of small-angle trackers and the accelerator magnets. This work paves the way for EIC studies of kaon structure and spin phenomena. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_12346 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Feasibility Study of Measuring $Λ^0\to nπ^{0}$ Using a High-Granularity Zero-Degree Calorimeter at the Future Electron-Ion Collider Paul, Sebouh J. Milton, Ryan Morán, Sebastián Schmookler, Barak Arratia, Miguel Nuclear Experiment Key measurements at the future Electron-Ion Collider (EIC), including first-of-their-kind studies of kaon structure, require the detection of $Λ^0$ at forward angles. We present a feasibility study of $Λ^0 \to nπ^0$ measurements using a high-granularity Zero Degree Calorimeter to be located about 35 m from the interaction point. We introduce a method to address the unprecedented challenge of identifying $Λ^0$s with energy $O(100)$ GeV that produce displaced vertices of $O(10)$ m. In addition, we present a reconstruction approach using graph neural networks. We find that the energy and angle resolution for $Λ^0$ is similar to that for neutrons, both of which meet the requirements outlined in the EIC Yellow Report.Furthermore, we estimate performance for measuring the neutron's direction in the $Λ^0$ rest frame, which reflects the $Λ^0$ spin polarization. We estimate that the neutral-decay channel $Λ^0 \to nπ^0$ will greatly extend the measurable energy range for the charged-decay channel $Λ^0 \to pπ^-$, which is limited by the location of small-angle trackers and the accelerator magnets. This work paves the way for EIC studies of kaon structure and spin phenomena. |
| title | Feasibility Study of Measuring $Λ^0\to nπ^{0}$ Using a High-Granularity Zero-Degree Calorimeter at the Future Electron-Ion Collider |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2412.12346 |