The decay τ→ (π, π') ν_τ in the Nambu - Jona-Lasinio model

2015/04/13 by A. I. Ahmadov, Ahmadov, A. I., M. K. Volkov +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.1504.03111

14 pages, 4 figures

openalex publication_date 2015/04/13 · arxiv created 2015/06/04 · arxiv updated 2015/06/05 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

In the Nambu - Jona-Lasinio model the decay widths τ→ (π, π'(1300)) ν_τ were calculated. For the calculation of the decay width τ→ πν_τ the standard NJL model was used with taking into account the intermediate axial-vector meson and the extended Nambu - Jona-Lasinio model with the intermediate a₁(1260) and a₁'(1647) mesons. These results are in good agreement with each other. For the calculation of the decay width τ→ π' ν_τ extended Nambu - Jona-Lasinio model was used. The results are in satisfactory agreement with the experimental data. Numerical estimates for the constant F_π and F_π' are also in satisfactory agreement with both the experimental values for F_π and the results obtained by calculations on the lattice.

Related

• The decays τ→ (η,η') K^- ν_τ in the extended Nambu-Jona-Lasinio model
• Decays τ→ ππην_τ and τ→ πηην_τ in the extended Nambu-Jona-Lasinio model
• Description of the decay τ→ K ππν_τ in the NJL type chiral quark model
• The decay τ→ 3πν_τ and axial-vector meson a₁ in the NJL model
• Weak semileptonic decays of vector mesons in the NJL model