scholarly journals QCD axion and topological susceptibility in chiral effective Lagrangian models at finite temperature

2020 ◽  
Vol 102 (1) ◽  
Author(s):  
Salvatore Bottaro ◽  
Enrico Meggiolaro
Keyword(s):  
Finite Temperature ◽  
Lagrangian Models ◽  
Effective Lagrangian

scholarly journals J/Ψ DISSOCIATION AND ADLER'S THEOREM

2005 ◽  
Vol 20 (27) ◽  
pp. 6169-6177 ◽  
Author(s):  
ALEX BOURQUE ◽  
CHARLES GALE ◽  
KEVIN L. HAGLIN
Keyword(s):  
Chiral Symmetry ◽  
Cross Sections ◽  
Lagrangian Models ◽  
Effective Lagrangian ◽  
Symmetry Properties ◽  
Energy Dependent ◽  
Distinguishing Features

Effective Lagrangian models of charmonium have recently been used to estimate dissociation cross sections with light hadrons. Detailed study of the symmetry properties reveals possible shortcomings relative to chiral symmetry. We therefore propose a new Lagrangian and point out distinguishing features amongst the different approaches. Using the newly proposed Lagrangian, which exhibits SU L (4) × SU R (4) symmetry and complies with Adler's theorem, we find dissociation cross sections with pions that are reduced in an energy dependent way, with respect to cases where the theorem is not fulfilled.

scholarly journals A VERTEX-STRUCTURE MODEL FOR NEW DIRECT CP-VIOLATING EFFECTS IN $\bar B^0(B^0)\to\phi K_{\rm S}$ AND IN B∓→π∓η′(η)

2006 ◽  
Vol 21 (36) ◽  
pp. 2729-2737
Author(s):  
SAUL BARSHAY ◽  
GEORG KREYERHOFF
Keyword(s):  
Standard Model ◽  
Structure Model ◽  
Lagrangian Models ◽  
Effective Lagrangian ◽  
S Parameter ◽  
The Standard Model

We consider effective Lagrangian models of CP-violating vertex structure in which a b→uW vertex, proportional to s13e-iδ13 with s13 very small (milliweak interaction) and δ13 large, is dynamically generated. A consequent, enhanced CP-violating vertex for b→sg results in an enhanced CP-violating phase in the ratio of amplitudes for [Formula: see text]. We estimate that this can significantly change the S-parameter from the value expected in the standard model.

Finite temperature effective Lagrangian in Yang-Mills field theory

1985 ◽  
Vol 28 (1) ◽  
pp. 67-69 ◽  
Author(s):  
Sh. S. Agaev ◽  
A. S. Vshivtsev ◽  
V. Ch. Zhukovskii ◽  
O. F. Semenov
Keyword(s):  
Field Theory ◽  
Finite Temperature ◽  
Yang Mills ◽  
Effective Lagrangian ◽  
Mills Field
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