https://doi.org/10.1140/epjc/s10052-024-12951-y
Letter
Polarization and quantum entanglement effects in 
process
1
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, 210023, Nanjing, Jiangsu, China
2
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, Gansu, China
3
CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China
4
Peng Huanwu Innovation Research Center, Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China
Received:
9
April
2024
Accepted:
21
May
2024
Published online:
6
June
2024
Motivated by the very recent observation of the 
decay using proton–proton collision data by the LHCb collaboration, we study the four-body angular distributions and the quantum entanglement effects in the associated with 
The helicity angular distributions are given in the QCD effective theory and the von Neumann entropy is obtained in 
decay process.
© The Author(s) 2024
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