Exact Treatment of Continuum Couplings in Nuclear Optical Potentials via Feshbach Theory

[2508.07584] Exact Treatment of Continuum Couplings in Nuclear Optical Potentials via Feshbach Theory Skip to main content Search Submit Donate Log in Nuclear Theory arXiv:2508.07584 (nucl-th) [Submitted on 11 Aug 2025 ( v1 ), last revised 26 Aug 2026 (this version, v2)] Title: Exact Treatment of Continuum Couplings in Nuclear Optical Potentials via Feshbach Theory Authors: Hao Liu , Jin Lei , Zhongzhou Ren View PDF HTML (experimental) Abstract: We present a full-coupling construction of the Feshbach effective interaction in a converged continuum-discretized coupled-channels (CDCC) calculation. The method retains the complete Green's function in the excluded continuum space, treating the continuum-continuum couplings to all orders within the discretized CDCC model space, and therefore yields an explicitly non-local dynamic polarization potential. Applied to $d+^{58}$Ni scattering, the projected two-body potential reproduces the parent CDCC elastic observables and gives a reasonable description of the available experimental data, providing a direct numerical check of the projection. The resulting non-local potential exposes the spatial structure generated by virtual breakup, continuum propagation, and absorption in the continuum. Through the generalized optical theorem, we quantify the continuum-coupling contribution to the elastic flux loss and compare it with the elastic-breakup cross section over a broad incident-energy range. The calculation shows that the elastic-breakup fraction increases with energy, whereas the additional absorption associated with continuum components is strongest at intermediate energies. Comments: Published version. 6 pages, 3 figures Subjects: Nuclear Theory (nucl-th) Cite as: arXiv:2508.07584 [nucl-th] (or arXiv:2508.07584v2 [nucl-th] for this version) https://doi.org/10.48550/arXiv.2508.07584 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Phys. Lett. B 880 (2026) 140716 Related DOI : https://doi.org/10.1016/j.physletb.2026.140716 Focus to learn more DOI(s) linking to related resources Submission history From: Jin Lei [ view email ] [v1] Mon, 11 Aug 2025 03:30:02 UTC (529 KB) [v2] Wed, 26 Aug 2026 01:48:43 UTC (349 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Current browse context: nucl-th < prev | next > new | recent | 2025-08 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab) Major funding support from

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