scholarly journals Resonance effects in pion and kaon decay constants

2014 ◽  
Vol 89 (9) ◽  
Author(s):  
Zhi-Hui Guo ◽  
Juan José Sanz-Cillero
Keyword(s):  
Kaon Decay ◽  
Resonance Effects ◽  
Decay Constants

scholarly journals On pion and kaon decay constants and their chiral SU(3) extrapolations

2019 ◽  
Vol 988 ◽  
pp. 36-47 ◽  
Author(s):  
Xiao-Yu Guo ◽  
M.F.M. Lutz
Keyword(s):  
Kaon Decay ◽  
Decay Constants

scholarly journals Decays of light mesons in the relativistic quark model

2019 ◽  
Vol 55 (3) ◽  
pp. 325-337
Author(s):  
V. Yu. Haurysh ◽  
V. V. Andreev
Keyword(s):  
Experimental Data ◽  
Quark Model ◽  
Radiative Decay ◽  
Form Factors ◽  
Integral Representations ◽  
Relativistic Quark Model ◽  
Vector Mesons ◽  
Resonance Effects ◽  
Decay Constants ◽  
Oscillator Wave Function

In the framework of the relativistic quark model based on the point form of the Poincaré-invariant quantum mechanics, the parameters were fixed using the integral representations of the lepton decay constants of pseudoscalar and vector mesons containing u-, d- and s-quarks. As a result of numerical calculations using the oscillator wave function, the basic parameters of the model are obtained using the pseudoscalar density constant and current quark masses. The analysis showed that the obtained calculation results in the framework of the model and the experimental data on the lepton decays of hadrons agree well with each other. As a result, the calculation method is generalized to the case of hadronic transitions with γ-quantum emission and a subsequent calculation of the integral representations of radiative decay constants of pseudoscalar and vector mesons. The obtained values of the anomalous magnetic moments are compared with the baryon data. As a test of the model, the authors studied the behavior of the form-factors of radiative decays of vector mesons with a subsequent comparison to the modern experimental data in the q < 0.5 GeV range where the resonance effects are insignificant. As a result, self-consistent descriptions of lepton and radiative transitions were obtained within the framework of the model proposed by the authors.

A New Type of Precision Tire

1988 ◽  
Vol 16 (4) ◽  
pp. 200-207
Author(s):  
O. B. Tretyakov
Keyword(s):  
Stress Concentration ◽  
Failure Rates ◽  
Stress Strain ◽  
Radial Tire ◽  
Resonance Effects ◽  
Precision Stage ◽  
New Type ◽  
Degree Of Order

Abstract A process is suggested for improving the rubber-cord composite in a radial tire through precision stage-by-stage molding of its parts. This starts by casting an inner elastomeric envelope of the carcass from a liquid oligomer mix. The full molding technology uses acoustic and resonance effects to optimize the degree of order of the structure and of rubber uniformity. The resultant precision tires should have a higher degree of order of both macro- and microstructure than do present commercial tires. Reduced stress concentration in locations that have high failure rates in commercial tires are considered. A new theory, CSSOT, is used for optimizing tires from results of stress-strain cycles.

Estimate of Hyperconjugation Strength in Alkylaromatics and Unsaturated Hydrocarbons Derived from Refractometric Data

2020 ◽  
Vol 23 (23) ◽  
pp. 2598-2613
Author(s):  
Boris A. Zaitsev
Keyword(s):  
Quantitative Estimation ◽  
Physical Phenomenon ◽  
Unsaturated Hydrocarbons ◽  
Resonance Effects ◽  
Alkyl Derivatives ◽  
Retrospective View ◽  
Scientific Papers ◽  
Polycyclic Aromatic ◽  
Qualitative Measure ◽  
Steric Inhibition Of Resonance

: A retrospective view of exaltation of refraction observed for many unsaturated and aromatic compounds demonstrates that this physical phenomenon is undeservedly considered only as a qualitative measure of conjugation. This mini-review discusses numerous papers by the author that have been published earlier in inaccessible periodicals and collections of scientific papers. Using a great number of illustrations, the author shows that this parameter can be successfully used for quantitative estimate of resonance effects in organic and polymer chemistry. The methods for derivation of strictly additive atomic and group refraction constants are described; these constants were subsequently used as a tool that allowed quantitative estimation of resonance effects in mono-, di-, tri- and polyalkylbenzenes, alkylnaphthalenes, some alkyl derivatives of unsaturated hydrocarbons. These effects cause strictly fixed increase in refraction of carbon atoms in different structural modifications (graphene, fullerene, diamond) and in polycyclic aromatic hydrocarbons. The relevant results regarding quantitative estimation of degree of steric inhibition of resonance in sterically hindered ortho-dialkylbenzenes, 1,2,3- trialkyl-, 1,2,3,4-tetraalkyl-, and 1,2,3,4,5-polyalkylbenzenes accumulated by the author are summarized.

Decay constants and sigma terms from the lattice.

2011 ◽  
Author(s):  
Alberto Ramos ◽  
Stephan Durr ◽  
Zoltan Fodor ◽  
Julien Frison ◽  
Christian Hoelbling ◽  
...  
Keyword(s):  
Decay Constants
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