scholarly journals a1-meson-baryon coupling constants in the framework of soft-wall and hard-wall AdS/QCD models

2019 ◽  
Vol 34 (35) ◽  
pp. 1950240 ◽  
Author(s):  
Narmin Huseynova ◽  
Shahin Mamedov
Keyword(s):  
Vector Meson ◽  
Axial Vector ◽  
Gauge Coupling ◽  
Coupling Constants ◽  
Hard Wall ◽  
Coupling Constant ◽  
Axial Vector Meson ◽  
Soft Wall ◽  
Magnetic Type ◽  
Type Coupling

We calculate the [Formula: see text]-meson-nucleon ([Formula: see text]-baryon) coupling constant in the framework of soft-wall and hard-wall AdS/QCD models. Interaction Lagrangian in the bulk of AdS space was written for a minimal gauge coupling, a magnetic type coupling and a triple coupling of bulk fields. Applying AdS/CFT correspondence from the bulk interaction Lagrangian, we obtain holographic expressions for the [Formula: see text]-axial-vector meson-nucleon ([Formula: see text]-baryon) coupling constant in the boundary QCD theory. Numerical results for the [Formula: see text] coupling constant in the framework of both models are close to the known phenomenological estimates. The [Formula: see text]-axial-vector meson-[Formula: see text]-baryon coupling constant was considered in the framework of hard-wall model.

EFFECTS OF TEMPERATURE-DEPENDENT COUPLING CONSTANT EVOLUTION ON THE UNIFICATION SCALE

1987 ◽  
Vol 02 (07) ◽  
pp. 479-485 ◽  
Author(s):  
K. ENQVIST ◽  
K. KAJANTIE
Keyword(s):  
Gauge Coupling ◽  
Coupling Constants ◽  
Thermal Bath ◽  
Coupling Constant ◽  
Temperature Dependent ◽  
Cosmological Context ◽  
Effects Of Temperature

We discuss how the evolution of gauge coupling constants is affected by a thermal bath, the existence of which is natural to assume in a cosmological context. The temperature dependent renormalization prescription induced by the thermal bath can cause sizeable effects, and the unification scale is shifted from the value computed from the coupling constant evolution in vacuum.

N16(O−) beta decay and weak axial vector meson exchange currents

1983 ◽  
Vol 28 (6) ◽  
pp. 2423-2432 ◽  
Author(s):  
C. A. Gagliardi ◽  
G. T. Garvey ◽  
J. R. Wrobel ◽  
S. J. Freedman
Keyword(s):  
Vector Meson ◽  
Beta Decay ◽  
Axial Vector ◽  
Meson Exchange ◽  
Axial Vector Meson ◽  
Vector Meson Exchange ◽  
Meson Exchange Currents

scholarly journals Sequential vector and axial-vector meson exchange and chiral loops in radiative phi decay

2003 ◽  
Vol 729 (2-4) ◽  
pp. 743-768 ◽  
Author(s):  
J.E. Palomar ◽  
L. Roca ◽  
E. Oset ◽  
M.J. Vicente Vacas
Keyword(s):  
Vector Meson ◽  
Axial Vector ◽  
Meson Exchange ◽  
Axial Vector Meson ◽  
Vector Meson Exchange

scholarly journals COMPLETE CLASSES OF GUTS WITH VANISHING ONE-LOOP BETA FUNCTIONS

1994 ◽  
Vol 09 (29) ◽  
pp. 5053-5075
Author(s):  
WOLFGANG LUCHA ◽  
FRANZ F. SCHÖBERL
Keyword(s):  
Gauge Coupling ◽  
Coupling Constants ◽  
Coupling Constant ◽  
Finiteness Conditions ◽  
Grand Unified Theories ◽  
Unified Theories ◽  
Dimensionless Coupling ◽  
The One ◽  
The Masses ◽  
Gauge Coupling Constant

By explicit solution of the one-loop finiteness conditions for all dimensionless coupling constants (i.e. the gauge coupling constant as well as Yukawa and quartic scalar-boson self-interaction coupling constants), two classes of grand unified theories characterized by renormalization-group beta functions which all vanish at least at the one-loop level are constructed and analyzed with respect to the (suspected) appearance of quadratic divergences, with the result that without exception in all of these models the masses of both vector and scalar bosons receive quadratically divergent one-loop contributions.

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