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Vector meson-nucleon scattering length \(|\alpha _{VN}|\) and trace anomalous energy contribution to the nucleon mass \(T_{A}\)

  • Regular Article - Theoretical Physics
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Abstract

The interaction of vector meson with nucleon, vector meson-nucleon scattering length \(|\alpha _{VN}|\), is an important component of the study of hadronic interactions. Nowadays many scattering length values have been reported using the recent photoproduction experiment data or quasidata. In addition, the study of trace anomalous energy contribution to the proton mass is also a hot topic in non-perturbative QCD and hadron physics. In this work, we established the relationship between the scattering length of the vector meson-proton \(|\alpha _{Vp}|\) and the trace anomaly contribution of the proton mass \(T_{A}\). With the scattering length values extracted by using the Vector Meson Dominance model, we obtained the trace anomaly contribution of the proton mass \(T_{A}\) = (19.0\(\%\) ± 0.8\(\%\)), which is of similar order of magnitude as the 23\(\%\) given by Lattice QCD calculation.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All mentioned data and the estimated results are clearly presented in the main text and the tables].

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Acknowledgements

We thank XiaoYun Wang for the fruitful discussions. This work is supported by the International Partnership Program of the Chinese Academy of Sciences under the Grant no. 016GJHZ2022054FN, the Strategic Priority Research Program of Chinese Academy of Sciences under the Grant No. XDB34030301, the National Natural Science Foundation of China No. 12005266 and Guangdong Major Project of Basic and Applied Basic Research No. 2020B0301030008.

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Author notes

  1. Chengdong Han and Wei Kou: contributed equally.

Authors and Affiliations

  1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

    Chengdong Han, Wei Kou, Rong Wang & Xurong Chen

  2. School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China

    Chengdong Han, Wei Kou, Rong Wang & Xurong Chen

  3. Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou, 510006, China

    Xurong Chen

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  1. Chengdong Han
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Correspondence to Xurong Chen.

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Communicated by Andre Peshier.

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Han, C., Kou, W., Wang, R. et al. Vector meson-nucleon scattering length \(|\alpha _{VN}|\) and trace anomalous energy contribution to the nucleon mass \(T_{A}\). Eur. Phys. J. A 59, 118 (2023). https://doi.org/10.1140/epja/s10050-023-01033-4

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