1. Vector meson-nucleon scattering length |αVN| and trace anomalous energy contribution to the nucleon mass TA.
- Author
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Han, Chengdong, Kou, Wei, Wang, Rong, and Chen, Xurong
- Subjects
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SCATTERING (Physics) , *PARTICLES (Nuclear physics) , *VECTOR mesons , *MESONS , *QUANTUM chromodynamics , *HADRONS - Abstract
The interaction of vector meson with nucleon, vector meson-nucleon scattering length | α 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 | α 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. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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