Extrapolating exclusive charmonium photoproduction to the forward regime using Gaussian process.
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| Title: | Extrapolating exclusive charmonium photoproduction to the forward regime using Gaussian process. |
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| Authors: | Wang, Xue1 (AUTHOR) xuewang@mail.sdu.edu.cn, Cao, Xu2,3 (AUTHOR) caoxu@impcas.ac.cn, Lu, Yu3 (AUTHOR) ylu@ucas.ac.cn, Xiong, Weizhi1 (AUTHOR) xiongw@sdu.edu.cn |
| Source: | European Physical Journal C -- Particles & Fields. May2026, Vol. 86 Issue 5, p1-11. 11p. |
| Subjects: | Gaussian processes, Differential cross sections, Particles (Nuclear physics), Momentum transfer |
| Abstract: | Accessing the forward kinematic regime of exclusive vector meson photoproduction is essential for probing the structure of the proton, yet this region is often experimentally inaccessible. We present a novel extrapolation of near-threshold γ p → J / ψ p differential cross section data to the forward regime d σ / d t | t = 0 by applying a non-parametric Gaussian process (GP) regression. By employing a two-dimensional GP dependent on both the squared momentum transfer t and the center-of-mass energy W, we perform a coherent analysis of world data and provide a robust quantification of the extrapolation uncertainties. Furthermore, we apply the GP in the determination of the proton mass radius from the J / ψ photoproduction data. We find that the extracted radius is subject to large systematic uncertainties, highlighting the challenge in precisely constraining this quantity with current experimental precision. This work demonstrates that GP is a powerful and systematic tool for phenomenological studies in hadron physics, particularly for extrapolations into unmeasured kinematic domains. [ABSTRACT FROM AUTHOR] |
| Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 194633954 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Extrapolating exclusive charmonium photoproduction to the forward regime using Gaussian process. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wang%2C+Xue%22">Wang, Xue</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> xuewang@mail.sdu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Cao%2C+Xu%22">Cao, Xu</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<i> caoxu@impcas.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Lu%2C+Yu%22">Lu, Yu</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> ylu@ucas.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Xiong%2C+Weizhi%22">Xiong, Weizhi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> xiongw@sdu.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. May2026, Vol. 86 Issue 5, p1-11. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Gaussian+processes%22">Gaussian processes</searchLink><br /><searchLink fieldCode="DE" term="%22Differential+cross+sections%22">Differential cross sections</searchLink><br /><searchLink fieldCode="DE" term="%22Particles+%28Nuclear+physics%29%22">Particles (Nuclear physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Momentum+transfer%22">Momentum transfer</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Accessing the forward kinematic regime of exclusive vector meson photoproduction is essential for probing the structure of the proton, yet this region is often experimentally inaccessible. We present a novel extrapolation of near-threshold γ p → J / ψ p differential cross section data to the forward regime d σ / d t | t = 0 by applying a non-parametric Gaussian process (GP) regression. By employing a two-dimensional GP dependent on both the squared momentum transfer t and the center-of-mass energy W, we perform a coherent analysis of world data and provide a robust quantification of the extrapolation uncertainties. Furthermore, we apply the GP in the determination of the proton mass radius from the J / ψ photoproduction data. We find that the extracted radius is subject to large systematic uncertainties, highlighting the challenge in precisely constraining this quantity with current experimental precision. This work demonstrates that GP is a powerful and systematic tool for phenomenological studies in hadron physics, particularly for extrapolations into unmeasured kinematic domains. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1140/epjc/s10052-026-15799-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 1 Subjects: – SubjectFull: Gaussian processes Type: general – SubjectFull: Differential cross sections Type: general – SubjectFull: Particles (Nuclear physics) Type: general – SubjectFull: Momentum transfer Type: general Titles: – TitleFull: Extrapolating exclusive charmonium photoproduction to the forward regime using Gaussian process. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wang, Xue – PersonEntity: Name: NameFull: Cao, Xu – PersonEntity: Name: NameFull: Lu, Yu – PersonEntity: Name: NameFull: Xiong, Weizhi IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 14346044 Numbering: – Type: volume Value: 86 – Type: issue Value: 5 Titles: – TitleFull: European Physical Journal C -- Particles & Fields Type: main |
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