Antiproton-proton annihilation into light neutral meson pairs within an effective meson theory

作者：Wang Ying; Bystritskiy Yury M; Ahmadov Azad I; Tomasi Gustafsson Egle^*

来源：PHYSICAL REVIEW C, 2017, 96(2): 025204.

DOI：10.1103/PhysRevC.96.025204

Antiproton-proton annihilation into light neutral mesons in the few GeV energy domain is investigated in view of a global description of the existing data and predictions for future work at the Antiproton Annihilation at Darmstadt (PANDA) experiment at the Facility for Antiproton and Ion Research (FAIR). An effective meson model earlier developed, with mesonic and baryonic degrees of freedom in s, t, and u channels, is applied here to pi(0) pi(0) production. Form factors with logarithmic s and t (u) dependencies are applied. A fair agreement with the existing angular distributions is obtained. Applying SU(3) symmetry, it is straightforward to recover the angular distributions for pi(0)eta and eta eta production in the same energy range. A good agreement is generally obtained with all existing data.

• 出版日期2017-8-14
• 单位中国地震局