scholarly journals Semileptonic Decays of Vector Mesons $$[\rho ,\omega ,\phi ] \to \pi [{{e}^{ + }}{{e}^{ - }},{{\mu }^{ + }}{{\mu }^{ - }}]$$ in a Chiral NJL Model

2021 ◽  
Vol 18 (2) ◽  
pp. 148-152
Author(s):  
M. K. Volkov ◽  
K. Nurlan
Keyword(s):  
Semileptonic Decays ◽  
Vector Mesons ◽  
Njl Model

scholarly journals GENERALIZED POLARIZABILITY OF NEUTRAL PIONS OF THE PROCESS e-e+ →π0π0γ IN THE NJL MODEL

2011 ◽  
Vol 26 (20) ◽  
pp. 3337-3346
Author(s):  
A. I. AHMADOV ◽  
E. A. KURAEV ◽  
M. K. VOLKOV
Keyword(s):  
Dalitz Plot ◽  
Neutral Pion ◽  
Vector Mesons ◽  
Annihilation Channel ◽  
Neutral Pions ◽  
Njl Model ◽  
Electron Positron ◽  
Intermediate Vector

Differential distributions in the π0π0γ system created in the annihilation channel of an electron–positron collision are considered. The energy fractions of the pions (Dalitz-plot) distribution are presented in a general form and in approximation of intermediate vector mesons (excited and ordinary ones). It is pointed out that in relevant experiments the generalized polarizability of the neutral pion can be measured. Numerical illustrations are presented.

scholarly journals THE SKYRMION LIMIT OF THE NAMBU–JONA-LASINIO SOLITON

1995 ◽  
Vol 10 (01) ◽  
pp. 67-78 ◽  
Author(s):  
U. ZÜCKERT ◽  
R. ALKOFER ◽  
H. REINHARDT ◽  
H. WEIGEL
Keyword(s):  
Axial Vector ◽  
Soliton Solutions ◽  
Type Model ◽  
Special Role ◽  
Vector Mesons ◽  
Gradient Expansion ◽  
Njl Model

The special role of the isoscalar mesons (σ and ω) in the NJL soliton is discussed. Stable soliton solutions are obtained when the most general ansatz compatible with vanishing grand spin is assumed. These solutions are compared to soliton solutions of a purely pseudoscalar Skyrme type model which is related to the NJL model by a gradient expansion and the limit of infinitely heavy (axial-) vector mesons.

Vector mesons from tensor couplings in the NJL model

1998 ◽  
Vol 443 (1-4) ◽  
pp. 33-39 ◽  
Author(s):  
M Jaminon ◽  
E Ruiz Arriola
Keyword(s):  
Vector Mesons ◽  
Njl Model

scholarly journals Pion Observables in the Extended NJL Model with Vector and Axial-Vector Mesons

1996 ◽  
Vol 249 (2) ◽  
pp. 499-531 ◽  
Author(s):  
Véronique Bernard ◽  
Alex H. Blin ◽  
Brigitte Hiller ◽  
Yuri P. Ivanov ◽  
Alexander A. Osipov ◽  
...  
Keyword(s):  
Axial Vector ◽  
Vector Mesons ◽  
Njl Model

scholarly journals NJL INTERACTION DERIVED FROM QCD: VECTOR AND AXIAL-VECTOR MESONS

2009 ◽  
Vol 24 (13) ◽  
pp. 2415-2430 ◽  
Author(s):  
B. A. ARBUZOV ◽  
M. K. VOLKOV ◽  
I. V. ZAITSEV
Keyword(s):  
Quark Mass ◽  
Light Quark ◽  
Axial Vector ◽  
Vector Mesons ◽  
Strong Decay ◽  
Njl Model ◽  
Pseudoscalar Mesons ◽  
Decay Widths ◽  
Light Quark Mass ◽  
Existing Data

In previous works effective nonlocal SU (2)× SU (2) NJL model was proposed in which all the parameters are expressed through those of the fundamental QCD: current light quark mass m0 and average nonperturbative αs. The results for scalar and pseudoscalar mesons are in satisfactory correspondence to existing data. In the present work the same model without introduction of any additional parameters is applied for a description of masses and strong decay widths of ρ- and a1-mesons. The results for both scalar and vector sectors agree with data up to accuracy of the model.

scholarly journals Mesonic correlation functions in the NJL model with vector mesons

1995 ◽  
Vol 359 (3-4) ◽  
pp. 273-280 ◽  
Author(s):  
R.M. Davidson ◽  
E. Ruiz Arriola
Keyword(s):  
Correlation Functions ◽  
Vector Mesons ◽  
Njl Model

scholarly journals D → a1, f1 transition form factors and semileptonic decays via 3-point QCD sum rules

2016 ◽  
Vol 31 (20n21) ◽  
pp. 1650116 ◽  
Author(s):  
Yabing Zuo ◽  
Yue Hu ◽  
Linlin He ◽  
Wei Yang ◽  
Yan Chen ◽  
...  
Keyword(s):  
Sum Rules ◽  
Axial Vector ◽  
Form Factors ◽  
Semileptonic Decays ◽  
Branching Ratios ◽  
Transition Form ◽  
Vector Mesons ◽  
Qcd Sum Rules ◽  
The Future ◽  
Spin Triplet

By using the 3-point QCD sum rules, we calculate the transition form factors of [Formula: see text] decays into the spin triplet axial vector mesons [Formula: see text], [Formula: see text], [Formula: see text]. In the calculations, we consider the quark contents of each meson in detail. In view of the fact that the isospin of [Formula: see text] is one, we calculate the [Formula: see text] and [Formula: see text] transition form factors separately. In the case of [Formula: see text], [Formula: see text], the mixing between light flavor [Formula: see text] singlet and octet is taken into account. Based on the form factors obtained here, we give predictions for the branching ratios of relevant semileptonic decays, which can be tested in the future experiments.

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

2019 ◽  
Vol 34 (24) ◽  
pp. 1950137 ◽  
Author(s):  
M. K. Volkov ◽  
K. Nurlan ◽  
A. A. Pivovarov
Keyword(s):  
Excited State ◽  
Axial Vector ◽  
Weak Decay ◽  
Vector Mesons ◽  
Decay Constants ◽  
Njl Model ◽  
Decay Widths ◽  
State Formula

In the extended Nambu–Jona-Lasinio (NJL) model, the decay widths of [Formula: see text], [Formula: see text] are calculated. The contributions from intermediate axial-vector mesons [Formula: see text], [Formula: see text] and the first radially excited state [Formula: see text] are taken into account. Estimates for the weak decay constants [Formula: see text] and [Formula: see text] are given. Predictions are made for the width of [Formula: see text] decay and [Formula: see text] constant.

RADIATIVE DECAYS OF PSEUDOSCALAR (P) AND VECTOR (V) MESONS AND THE PROCESSES e+e- → ηρ(ω) AND e+e- → ϕη(η')

2009 ◽  
Vol 24 (14) ◽  
pp. 2629-2638 ◽  
Author(s):  
YU. M. BYSTRITSKIY ◽  
E. A. KURAEV ◽  
M. SEČANSKÝ ◽  
M. K. VOLKOV
Keyword(s):  
Experimental Data ◽  
Center Of Mass ◽  
Radiative Decays ◽  
Recent Experimental Data ◽  
Vector Mesons ◽  
Quark Confinement ◽  
Center Of Mass Energy ◽  
Njl Model ◽  
Electron Positron Annihilation ◽  
Electron Positron

Radiative decays of pseudoscalar and vector mesons are calculated in the frames of chiral Nambu–Jona-Lasinio (NJL) model. We use triangle quark loops of anomalous type. During the evaluation of this loop integrals we used two methods. In the first method we neglect the dependence of external momenta. In that case we reproduce the Wess–Zumino–Witten terms of effective chiral meson Lagrangian. In the second method we take into account the momenta dependence of loop integrals omitting their imaginary part. This enables us to take into account quark confinement. The application of both methods are in qualitative agreement with each other and with experimental data. The second method allows us to describe the electron–positron annihilation with production pseudoscalar and vector mesons in center-of-mass energy range from 1 to 5 GeV. Comparisons with the recent experimental data are presented.

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