Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (6): 152 doi: 10.1007/s41365-016-0147-x

Special Issue: Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2016)

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2016) • Previous Articles    

Measurements of momentum correlation and interaction parameters between antiprotons

Zheng-Qiao Zhang 1,2, Yu-Gang Ma 1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Contact: Yu-Gang Ma E-mail:ygma@sinap.ac.cn
  • Supported by:

    This work was supported in part by the National Natural Science Foundation of China (No. 11421505) and the Major State Basic Research Development Program in China (No. 2014CB845401).

PDF ShareIt Export Citation
Zheng-Qiao Zhang, Yu-Gang Ma. Measurements of momentum correlation and interaction parameters between antiprotons.Nuclear Science and Techniques, 2016, 27(6): 152     doi: 10.1007/s41365-016-0147-x
Citations
Altmetrics

Abstract:

The two-particle momentum correlation is influenced by the nuclear force between two particles, which has been intensively studied for nucleons and nuclei, but not much for antinucleons or antinuclei. In this proceeding, we present our STAR measurements on momentum correlation function of antiproton–antiproton and proton–proton in Au+Au collisions at √sNN = 200 GeV at the Relativistic Heavy Ion Collider. Attractive nuclear force between two antiprotons is demonstrated, and the strong interaction parameters (the scattering length and the effective range) are determined. This measurement serves as an additional verification of CPT symmetry. The present information on the strong force in the antiproton–antiproton system provides a fundamental ingredient towards understanding the structure of more sophisticated antinuclei.

Key words: Antiproton, Momentum correlation, Antimatter interaction, CPT symmetry