K. Nurlan

activity

20162026

τ \to (K, K (1460)) ν_{τ}

and the value of the weak decay coefficients

F_{K}

and

F_{K^{^{'}}}

in the extended NJL model

10 citations · 59 across the 27 of their papers we have counts for

collaborators

28 papers

hep-ph2026

Decay widths of radially excited vector mesons of the $U (3)$ nonet with production of three pseudoscalar mesons in the extended NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

In the extended NJL model, the decays of the first radially excited vector mesons $ρ^{'}$ , $ω^{'}$ , $ϕ^{'}$ and $K^{*}^{'}$ with production of $3 P$ , where $P = K, π, η$ are calculated. The box chan…

hep-ph2026

Description of the process $e^{+} e^{-} \to π^{0} π^{0} γ$ in the extended NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

The cross section of the process $e^{+} e^{-} \to π^{0} π^{0} γ$ is calculated in the extended NJL quark model. The vector channel with the intermediate $ρ$ , $ω$ , $ρ^{'}$ and $ω^{'}$ mesons is co…

hep-ph2026

Chiral anomaly in the $η^{(')} \to π^{+} π^{-} γ$ and $η^{(')} \to π^{+} π^{-} l^{+} l^{-}$ decays

M. K. Volkov, A. A. Osipov, K. Nurlan +1

We report the presence of a flavor-violating correction to the $V AAA$ -type anomaly, $δ^{(')}$ , induced by the surface terms of the anomalous quark triangle diagram, previously…

hep-ph2025

Decays $f_{1} \to a_{0} π, π π π (η)$ and $f_{1} \to K K π$ in the chiral $U (3) \times U (3)$ quark NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

The branching fractions of the axial vector meson decays $f_{1} \to a_{0} π, π π η$ , $f_{1} \to ρ π, π π π$ and $f_{1} \to K K π$ are calculated in the standard $U (3) \times U (3)$ quark NJL model.…

hep-ph2025

Decays $τ \to π π η ν_{τ}$ and $τ \to π η η ν_{τ}$ in the extended Nambu-Jona-Lasinio model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

In the framework of the extended Nambu-Jona-Lasinio model, the processes $τ \to π π η (η^{'}) ν_{τ}$ and $τ \to π η η (η^{'}) ν_{τ}$ are considered taking into account mesons in the ground and first r…

hep-ph2024

Decays $τ \to f_{0} (π, K) ν_{τ}$ and $τ \to 3 π ν_{τ}$ accounting for the contribution of $f_{0} (500)$

M. K. Volkov, A. A. Pivovarov, K. Nurlan

In the $U (3) \times U (3)$ quark NJL model, $τ$ lepton decays with the production of scalar mesons $f_{0} (π, K])$ and neutrinos are studied, where $f_{0} = f_{0} (500), f_{0} (980)$ . It is shown…

hep-ph2024

Weak semileptonic decays of vector mesons in the NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

The decay widths of $V \to K (π) l ν ˉ_{l}$ are calculated within the Nambu--Jona-Lasinio model, where $V = K^{*}, ρ, ω, ϕ$ and $l = μ, e$ . The results are obtained using the previously…

hep-ph2024

Description of the processes $e^{+} e^{-} \to π^{+} π^{-}$ and $τ^{-} \to π^{-} π^{0} ν_{τ}$ in the NJL model with value of the vector coupling constant $g_{ρ} = 6$

M. K. Volkov, A. A. Pivovarov, K. Nurlan

It is shown that the processes $e^{+} e^{-} \to π^{+} π^{-}$ and $τ^{-} \to π^{-} π^{0} ν_{τ}$ can be described in a unified approach in satisfactory agreement with experiment using the vector cou…

hep-ph2024

Description of the processes $e^{+} e^{-} \to K^{+} K^{-} π^{0}$ and $e^{+} e^{-} \to K^{+} K^{-} η$ within the extended NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

In the framework of the $U (3) \times U (3)$ extended Nambu-Jona-Lasinio model, the processes $e^{+} e^{-} \to K^{+} K^{-} π^{0}$ and $e^{+} e^{-} \to K^{+} K^{-} η$ are described taking into account both g…

hep-ph2023

Decays of radially excited vector mesons $ρ^{'}$ and $ω^{'}$ in the extended NJL model

M. K. Volkov, A. B. Arbuzov, A. A. Pivovarov +1

The decay widths of $ρ^{'} \to π π, ω π, ρ η$ , $ω^{'} \to ρ π, ω η$ and $π^{'} \to ρ π$ are recalculated within the extended NJL quark model. It is shown that the mass of $ρ^{'} (1450)$ meson in the…

hep-ph2023

The decays $τ \to [K^{-} K^{0} π^{0}, K^{-} K^{+} π^{-}, K^{0} K^{0} ˉ π^{-}] ν_{τ}$ in the NJL quark model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

The $τ$ lepton decays $τ \to [K^{-} K^{0} π^{0}, K^{-} K^{+} π^{-}, K^{0} K^{0} ˉ π^{-}] ν_{τ}$ are described in the $U (3) \times U (3)$ NJL quark model. The contact channel and intermediate channe…

hep-ph2023

Three-meson $τ$ decays involving kaons and $η$ mesons in the NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

Branching fractions of decays $τ \to K^{0} π^{-} η ν_{τ}$ , $τ \to K^{-} π^{0} η ν_{τ}$ , $τ \to K^{-} K^{0} η ν_{τ}$ and $τ \to K^{-} η η ν_{τ}$ are calculated in the $U (3) \times U (3)$ chiral NJL quark model. The…

hep-ph2023

The decay $τ \to 3 π ν_{τ}$ and axial-vector meson $a_{1}$ in the NJL model

Volkov M. K., Nurlan K., Pivovarov A. A

The branching fractions of $τ \to π^{+} π^{-} π^{-} ν_{τ}$ and $τ \to π^{-} 2 π^{0} ν_{τ}$ are calculated within the chiral NJL model. Features of the axial-vector $a_{1}$ meson which plays an importan…

hep-ph2023

Description of the decay $τ \to K π π ν_{τ}$ in the NJL type chiral quark model

Volkov M. K., Pivovarov A. A., Nurlan K

The branching fractions of the decays $τ^{-} \to K^{-} π^{+} π^{-} ν_{τ}$ , $τ^{-} \to K^{-} π^{0} π^{0} ν_{τ}$ and $τ^{-} \to K ˉ^{0} π^{-} π^{0} ν_{τ}$ are calculated in the $U (3) \times U (3)$ Nambu--Jona-La…

hep-ph2022

The decay $η^{'} \to π ρ$ in the chiral NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

The branching fraction of the decay $η^{'} \to π ρ$ is calculated in the chiral quark NJL model. The decay exists due to the mass difference between $u$ - and $d$ -quarks leading to $π^{…

hep-ph2022

The decays $τ \to a_{1} π ν_{τ}$ , $τ \to K_{1} π ν_{τ}$ and $τ \to K_{1} K ν_{τ}$ in the extended $U (3) \times U (3)$ chiral NJL model

Mikhail K. Volkov, Aleksey A. Pivovarov, Kanat Nurlan

The branching fractions of the decays $τ \to a_{1} π ν_{τ}$ , $τ \to K_{1} π ν_{τ}$ and $τ \to K_{1} K ν_{τ}$ are calculated in the framework of the extended $U (3) \times U (3)$ chiral Nambu--Jo…

hep-ph2021★ 1 cited

The second-class current decays $τ \to π η (η^{'}) ν_{τ}$ in the NJL model including the interaction of mesons in the final state

M. K. Volkov, K. Nurlan, A. A. Pivovarov

The effect of the interaction of mesons in the final state is additionally considered within the description of $τ \to π η (η^{'}) ν_{τ}$ decays. This interaction is taken into account at…

hep-ph2021★ 6 cited

$1/ N_{c}$ approximation and universality of vector mesons

M. K. Volkov, A. A. Osipov, A. A. Pivovarov +1

In this work, we argue that the observed differences in the value of the vector coupling constant extracted from the decays $ρ \to π π$ ( $g_{ρ} = 6.0$ ), $ρ \to l^{+} l^{-}$ ( $g_{ρ} = 5.0$ ) an…

hep-ph2020

Fixing the vector coupling constant $g_{ρ} = 5.0$ in the NJL model and final-state interactions in processes $ρ \to e^{+} e^{-} [μ^{+} μ^{-}]$ , $ρ \to π^{+} π^{-}$ , $τ \to π^{-} π^{0} ν_{τ}$ , and $e^{+} e^{-} \to π^{+} π^{-}$

M. K. Volkov, A. B. Arbuzov, K. Nurlan +1

The possibility to use the width of the decay $ρ \to e^{+} e^{-}$ to fix the input parameter $g_{ρ} = 5.0$ of the $S U (2) \times S U (2)$ chiral-symmetric Nambu--Jona-Lasinio model is discu…

hep-ph2020★ 8 cited

On the mixing angle of the vector mesons $ω (782)$ and $ϕ (1020)$

M. K. Volkov, A. A. Pivovarov, K. Nurlan

In the present work, the mixing angle of the vector $ω (782)$ and $ϕ (1020)$ mesons is estimated in the framework of Nambu--Jona-Lasinio model. The decay $ϕ \to π^{0} γ$ is considered…

hep-ph2019★ 4 cited

The decay $τ \to K^{* 0} (892) K^{-} ν_{τ}$ in the extended NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

In the extended Nambu -- Jona-Lasinio model, the decay width of $τ \to K^{* 0} (892) K^{-} ν_{τ}$ is calculated. The contributions from the contact diagram and diagrams with intermediate…

hep-ph2019★ 6 cited

The decay $τ \to K^{*-} (892) η ν_{τ}$ in the NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

The decay width $τ \to K^{*-} (892) η ν_{τ}$ was calculated in the Nambu--Jona-Lasinio model. Four channels were taken into account: the contact channel (the final states are directly p…

hep-ph2019★ 9 cited

The decays $τ \to [ω (782), ϕ (1020)] K^{-} ν_{τ}$ in the extended NJL model

M. K. Volkov, A. A. Pivovarov, K. Nurlan

In the extended Nambu--Jona-Lasinio model, the decay widths of the processes $τ \to [ω (782), ϕ (1020)] K^{-} ν_{τ}$ were calculated. The intermediate channels with axial vector ($K_{1}…

hep-ph2019★ 10 cited

The decays $τ \to (K, K (1460)) ν_{τ}$ and the value of the weak decay coefficients $F_{K}$ and $F_{K^{^{'}}}$ in the extended NJL model

M. K. Volkov, K. Nurlan, A . A. Pivovarov

In the extended NJL model, the decay widths of $τ \to (K, K (1460)) ν_{τ}$ , $(K, K (1460)) \to μ ν_{μ}$ are calculated. The contributions from intermediate axial-vector meson…

Decay widths of radially excited vector mesons of the U(3) nonet with production of three pseudoscalar mesons in the extended NJL model

Description of the process e+e−→π0π0γ in the extended NJL model

Chiral anomaly in the η(′)→π+π−γ and η(′)→π+π−l+l− decays

Decays f1​→a0​π,πππ(η) and f1​→KKπ in the chiral U(3)×U(3) quark NJL model

Decays τ→ππηντ​ and τ→πηηντ​ in the extended Nambu-Jona-Lasinio model

Decays τ→f0​(π,K)ντ​ and τ→3πντ​ accounting for the contribution of f0​(500)

Weak semileptonic decays of vector mesons in the NJL model

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

Description of the processes e+e−→K+K−π0 and e+e−→K+K−η within the extended NJL model

Decays of radially excited vector mesons ρ′ and ω′ in the extended NJL model

The decays τ→[K−K0π0,K−K+π−,K0K0ˉπ−]ντ​ in the NJL quark model

Three-meson τ decays involving kaons and η mesons in the NJL model

The decay τ→3πντ​ and axial-vector meson a1​ in the NJL model

Description of the decay τ→Kππντ​ in the NJL type chiral quark model

The decay η′→πρ in the chiral NJL model

The decays τ→a1​πντ​, τ→K1​πντ​ and τ→K1​Kντ​ in the extended U(3)×U(3) chiral NJL model

The second-class current decays τ→πη(η′)ντ​ in the NJL model including the interaction of mesons in the final state

1/Nc​ approximation and universality of vector mesons

Fixing the vector coupling constant gρ​=5.0 in the NJL model and final-state interactions in processes ρ→e+e−[μ+μ−], ρ→π+π−, τ→π−π0ντ​, and e+e−→π+π−

On the mixing angle of the vector mesons ω(782) and ϕ(1020)

The decay τ→K∗0(892)K−ντ​ in the extended NJL model

The decay τ→K∗−(892)ηντ​ in the NJL model

The decays τ→[ω(782),ϕ(1020)]K−ντ​ in the extended NJL model

The decays τ→(K,K(1460))ντ​ and the value of the weak decay coefficients FK​ and FK′​ in the extended NJL model

Decay widths of radially excited vector mesons of the $U (3)$ nonet with production of three pseudoscalar mesons in the extended NJL model

Description of the process $e^{+} e^{-} \to π^{0} π^{0} γ$ in the extended NJL model

Chiral anomaly in the $η^{(')} \to π^{+} π^{-} γ$ and $η^{(')} \to π^{+} π^{-} l^{+} l^{-}$ decays

Decays $f_{1} \to a_{0} π, π π π (η)$ and $f_{1} \to K K π$ in the chiral $U (3) \times U (3)$ quark NJL model

Decays $τ \to π π η ν_{τ}$ and $τ \to π η η ν_{τ}$ in the extended Nambu-Jona-Lasinio model

Decays $τ \to f_{0} (π, K) ν_{τ}$ and $τ \to 3 π ν_{τ}$ accounting for the contribution of $f_{0} (500)$

Description of the processes $e^{+} e^{-} \to π^{+} π^{-}$ and $τ^{-} \to π^{-} π^{0} ν_{τ}$ in the NJL model with value of the vector coupling constant $g_{ρ} = 6$

Description of the processes $e^{+} e^{-} \to K^{+} K^{-} π^{0}$ and $e^{+} e^{-} \to K^{+} K^{-} η$ within the extended NJL model

Decays of radially excited vector mesons $ρ^{'}$ and $ω^{'}$ in the extended NJL model

The decays $τ \to [K^{-} K^{0} π^{0}, K^{-} K^{+} π^{-}, K^{0} K^{0} ˉ π^{-}] ν_{τ}$ in the NJL quark model

Three-meson $τ$ decays involving kaons and $η$ mesons in the NJL model

The decay $τ \to 3 π ν_{τ}$ and axial-vector meson $a_{1}$ in the NJL model

Description of the decay $τ \to K π π ν_{τ}$ in the NJL type chiral quark model

The decay $η^{'} \to π ρ$ in the chiral NJL model

The decays $τ \to a_{1} π ν_{τ}$ , $τ \to K_{1} π ν_{τ}$ and $τ \to K_{1} K ν_{τ}$ in the extended $U (3) \times U (3)$ chiral NJL model

The second-class current decays $τ \to π η (η^{'}) ν_{τ}$ in the NJL model including the interaction of mesons in the final state

$1/ N_{c}$ approximation and universality of vector mesons

Fixing the vector coupling constant $g_{ρ} = 5.0$ in the NJL model and final-state interactions in processes $ρ \to e^{+} e^{-} [μ^{+} μ^{-}]$ , $ρ \to π^{+} π^{-}$ , $τ \to π^{-} π^{0} ν_{τ}$ , and $e^{+} e^{-} \to π^{+} π^{-}$

On the mixing angle of the vector mesons $ω (782)$ and $ϕ (1020)$

The decay $τ \to K^{* 0} (892) K^{-} ν_{τ}$ in the extended NJL model

The decay $τ \to K^{*-} (892) η ν_{τ}$ in the NJL model

The decays $τ \to [ω (782), ϕ (1020)] K^{-} ν_{τ}$ in the extended NJL model

The decays $τ \to (K, K (1460)) ν_{τ}$ and the value of the weak decay coefficients $F_{K}$ and $F_{K^{^{'}}}$ in the extended NJL model