Decays τ→f0(π,K)ντ and τ→3πντ accounting for the contribution of f0(500)
Volkov M.K. Pivovarov A.A. Nurlan K.
March 2025Springer
European Physical Journal A
2025#61Issue 3
In the U(3)×U(3) quark NJL model, τ lepton decays with the production of scalar mesons f0(π,K) and neutrinos are studied, where f0=f0(500),f0(980). It is shown that these decays mainly occur via contact channels and channels with axial-vector mesons a1(1260), K1(1270) and K1(1400). All mesons are considered as quark-antiquark states in this case. The obtained results can be considered as predictions for future experiments. The obtained estimates for the branching fractions of the τ→π-2π0ντ decay taking into account the contributions of the ρπ and f0(500)π states are in satisfactory agreement with experimental data.
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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
10 лет помогаем публиковать статьи Международный издатель
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