The tetraquark K₁(1400) in the decays τ→ [ω(782), ϕ(1020)] K^- ν_τ

2019/03/02 by Volkov, M. K., Pivovarov, Aleksey A., Nurlan, K.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1903.00698

Abstract

In the extended Nambu--Jona-Lasinio model, the decay widths of the processes τ→ [ω(782), ϕ(1020)] K^- ν_τ were calculated. The intermediate strange quark-antiquark mesons in both the ground and the first radially excited states were taken into account. The meson K₁(1400), being a possible candidate for the role of the tetraquark meson, was also taken into account as an intermediate state. The result for the process τ→ ω(782) K^- ν_τ is in satisfactory agreement with the experimental data. Simultaneously, the result for the decay τ→ ϕ(1020) K^- ν_τ is in agreement with the experimental data with precision 1.3 σ.

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