Regular Article - Theoretical Physics

The European Physical Journal A

, 47:103

First online:

Processes e+e → π00′) γ in extended NJL model

  • A. B. ArbuzovAffiliated withBogoliubov Laboratory of Theoretical Physics, JINRDepartment of Higher Mathematics, University of Dubna Email author 
  • , E. A. KuraevAffiliated withBogoliubov Laboratory of Theoretical Physics, JINR
  • , M. K. VolkovAffiliated withBogoliubov Laboratory of Theoretical Physics, JINR

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The processes of electron-positron annihilation into π0γ and into π′(1300)γ are considered within an extended NJL model. The intermediate vector mesons ρ 0, ω ρ′(1450), and ω(1420) are taken into account. The latter two mesons are treated as the first radial excited states. They are incorporated into the NJL model by means of a polynomial form factor. Numerical predictions for the cross-sections of these processes are received for the center-of-mass energies below 2 GeV. Our results for the π0γ production are in agreement with experimental data obtained in the energy region 600–1020 MeV.