Description of the processes e+e− → π+π− and τ− → π−π0ντ in the NJL model with value of the vector coupling constant gρ = 6
Volkov M.K. Pivovarov A.A. Nurlan K.
February 2025Elsevier B.V.
Nuclear Physics A
2025#1054
It is shown that the processes e+e−→π+π− and τ−→π−π0ντ can be described in a unified approach in satisfactory agreement with experiment using the vector coupling constant gρ=6. In this case, in addition to quark loops, it is also necessary to take into account meson loops corresponding to the next order in 1/Nc. These loops must be taken into account when describing the γ(W)→ρ transition, as well as in interaction of mesons in the final state.
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Bogoliubov Laboratory of Theoretical Physics, JINR, Moscow region, Dubna, 141980, Russian Federation
The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Bogoliubov Laboratory of Theoretical Physics
The Institute of Nuclear Physics
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