THE MASS RELATION BETWEEN THE PURE AND PHYSICAL GROUND PSEUDOSCALAR GLUEBALLS

2002 ◽  
Vol 17 (10) ◽  
pp. 619-626
Author(s):  
DE-MIN LI ◽  
HONG YU ◽  
QI-XING SHEN
Keyword(s):  
Experimental Data ◽  
Lattice Qcd ◽  
Mass Matrix ◽  
Experimental Information ◽  
Mass Relation ◽  
Physical Ground ◽  
Transition Amplitudes

The experimental information indicates that for the ground pseudoscalar states, the omission of the transition amplitudes between quarkonia can result in the unreasonable result. It is believed that the mass of the pure glueball employed in the general form of the mass matrix is different from the mass predicted by lattice QCD in quenched approximation for the ground pseudoscalar glueball. The mass relation between the pure and physical ground pseudoscalar glueballs is determined from the experimental data.

On the bursting mechanism in rotating rings

1993 ◽  
Vol 28 (3) ◽  
pp. 153-162 ◽  
Author(s):  
C Bandera ◽  
M Nicolich ◽  
A Strozzi
Keyword(s):  
Experimental Data ◽  
Correction Factor ◽  
Static Loading ◽  
Experimental Information ◽  
Theoretical Interpretation ◽  
Dynamic Correction

The bursting mechanism in roatating, bored discs is theoretically reviewed in the light of published experimental information. In particlar, the segmentation sequence in bursting wheels is analysed according to a curved bar modelling and to a quasi-static loading, where a dynamic correction factor is introduced which reconciles theory with experiments. Finally, a diagram reporting the number of wheel fragmented pieces in terms of the ratio of ring inner to outer radii is presented, based upon available experimental data and theoretical interpretation.

Simulation and prediction of optical characterization of casting (Adamantan-Fulgide) thin films using (CTANNs) approach

2019 ◽  
Vol 33 (11) ◽  
pp. 1950093 ◽  
Author(s):  
A. M. A. EL-Barry ◽  
D. M. Habashy
Keyword(s):  
Experimental Data ◽  
Thin Films ◽  
Back Propagation ◽  
Optical Characterization ◽  
Experimental Information ◽  
Training Algorithm ◽  
Energy Gaps ◽  
Resilient Back Propagation ◽  
Good Agreement

For reinforcement, the photochromic field and the cooperation between the theoretical and experimental branches of physics, the computational, theoretical artificial neural networks (CTANNs) and the resilient back propagation (R[Formula: see text]) training algorithm were used to model optical characterizations of casting (Admantan-Fulgide) thin films with different concentrations. The simulated values of ANN are in good agreement with the experimental data. The model was also used to predict values, which were not included in the training. The high precision of the model has been constructed. Moreover, the concentration dependence of both the energy gaps and Urbach’s tail were, also tested. The capability of the technique to simulate the experimental information with best accuracy and the foretelling of some concentrations which is not involved in the experimental data recommends it to dominate the modeling technique in casting (Admantan-Fulgide) thin films.

scholarly journals A Temperature Variation of Debye-Waller Factor for Alkali and Noble Metals

1983 ◽  
Vol 38 (5) ◽  
pp. 503-508 ◽  
Author(s):  
A. R. Jani ◽  
V. B. Gohel
Keyword(s):  
Experimental Data ◽  
Temperature Variation ◽  
Phenomenological Model ◽  
Noble Metals ◽  
Experimental Information ◽  
Waller Factor ◽  
Critical Examination ◽  
Debye Waller Factor ◽  
Different Temperatures ◽  
Experimental Findings

Debye-Waller factors at different temperatures of four alkali and three noble metals have been computed on the basis of a screened shell phenomenological model. The theoretical values are compared with existing experimental data. Particularly for lithium and potassium, most recent experimental information has been included. A critical examination of the results reveals a satis­factory agreement between the theoretical and experimental findings.

ASPECTS OF Q-MATTER STABILITY

1992 ◽  
Vol 07 (28) ◽  
pp. 7169-7184 ◽  
Author(s):  
MINOS AXENIDES
Keyword(s):  
Order Parameter ◽  
Mass Matrix ◽  
Equations Of Motion ◽  
Finite Energy ◽  
Field Theories ◽  
Strong Interactions ◽  
Mass Relation ◽  
Bosonic Field ◽  
Meson Octet ◽  
Continuous Symmetries

Relativistic bosonic field theories in 3+1 dimensions with exact global continuous symmetries and conserved charges Q may admit stable, finite energy, time dependent configurations (Q-balls) as solutions to their equations of motion. Previous work established their existence for both Abelian and non-Abelian symmetries. In the present work we elaborate on some more issues of stability and uniqueness that arise in the SO(3) and SU(3) renormalizable models. We consider the effect of explicit symmetry breaking in the spectrum of the SU(3) model, by identifying its order parameter with the meson octet and by choosing a mass matrix consistent with the Gell-Mann-Okubo mass relation. We demonstrate the existence of “isospin” and “strange” balls whose stability is due to the presence of residual global symmetries which are identified with the exact symmetries of isospin and strangeness of strong interactions.

scholarly journals Charged exotic charmonium states

2014 ◽  
Vol 29 (05) ◽  
pp. 1430005 ◽  
Author(s):  
Marina Nielsen ◽  
Fernando S. Navarra
Keyword(s):  
Experimental Data ◽  
Sum Rules ◽  
Experimental Information ◽  
Qcd Sum Rules ◽  
Theoretical Approaches ◽  
Decay Widths ◽  
Method Show ◽  
Charmonium States

In this review, we present and discuss all the experimental information about the charged exotic charmonium states, which have been observed over the last five years. We try to understand their properties such as masses and decay widths with QCD sum rules. We describe this method, show the results and compare them with the experimental data and with other theoretical approaches.

WHAT DOES μ - τ SYMMETRY IMPLY ABOUT LEPTONIC CP VIOLATION?

2007 ◽  
Vol 16 (05) ◽  
pp. 1373-1381 ◽  
Author(s):  
TEPPEI BABA
Keyword(s):  
Experimental Data ◽  
Cp Violation ◽  
Symmetry Breaking ◽  
Neutrino Mass ◽  
Mass Matrix ◽  
Mass Difference ◽  
Atmospheric Neutrino ◽  
Symmetric Part ◽  
Neutrino Mixing ◽  
Mixing Angles

The μ - τ symmetry can reproduce the consistent results with experimental data of θ13, and θ23 (θ13, and θ23 respectively denote the νe - ντ, and νμ - ντ, mixing angles). However, we can not address the issue of the leptonic CP violation in μ - τ symmetric models. So we add the μ - τ symmetry breaking part to include the CP violation. We characterize leptonic CP violation in terms of three phases, where one is conventional phase δ and others are additional phases ρ and γ. These δ, ρ and γ are, respectively, the phases of νe - ντ, νe - νμ and νμ - ντ mixings. The ρ and γ are redundant but the effect of ρ remains in the leptonic CP violation which is characterized by δ + ρ. The δ arises from the μ - τ symmetry breaking part of the Meμ and Meτ while ρ arises from of μ - τ symmetric part of the Meμ and Meτ, where Mij stands for ij (i,j = e,μ,τ) element of M(= [Formula: see text] for Mν being a flavor neutrino mass matrix). Moreover, θ23 can be exactly estimated to be: [Formula: see text] ( sin θ ∝ sin θ13 cos (δ + ρ)[Formula: see text], sin ϕ ∝ Mμμ - Mττ, where [Formula: see text] is the solar neutrino mass difference squared). The conditions of maximal atmospheric neutrino mixing are given by [Formula: see text] and Mμμ = Mττ,which indicate maximal Dirac CP violation.

scholarly journals QUARK MIXING FROM MASS MATRIX MODEL WITH FLAVOR 2 ↔ 3 SYMMETRY

2008 ◽  
Vol 23 (27n28) ◽  
pp. 4557-4568 ◽  
Author(s):  
HIROYUKI NISHIURA ◽  
KOICHI MATSUDA ◽  
TAKESHI FUKUYAMA
Keyword(s):  
Experimental Data ◽  
Matrix Model ◽  
Present Model ◽  
Mass Matrix ◽  
Invariant Structure ◽  
Quark Mixing ◽  
Mixing Matrix ◽  
Free Parameters

We consider a universal mass matrix model which has a seesaw-invariant structure with the most general texture based on flavor 2 ↔ 3 symmetry common to all quarks and leptons. The CKM quark mixing matrix of the model is analyzed. It is shown that the model is consistent with all the experimental data of quark mixings by tuning free parameters of the model. We also show that the values of parameters of the present model consistent with the experimental data are not far from the ones of the mass matrix model with a vanishing (1, 1) element.

scholarly journals How to Determine Accurate Conformational Ensembles by Metadynamics Metainference: A Chignolin Study Case

2021 ◽  
Vol 8 ◽  
Author(s):  
Cristina Paissoni ◽  
Carlo Camilloni
Keyword(s):  
Experimental Data ◽  
Molecular Dynamics ◽  
Experimental Information ◽  
Conformational Ensemble ◽  
Enhanced Sampling ◽  
Conformational Ensembles ◽  
Statistical Precision ◽  
Minimum Number ◽  
Study Case ◽  
Dynamics Simulations

The reliability and usefulness of molecular dynamics simulations of equilibrium processes rests on their statistical precision and their capability to generate conformational ensembles in agreement with available experimental knowledge. Metadynamics Metainference (M&M), coupling molecular dynamics with the enhanced sampling ability of Metadynamics and with the ability to integrate experimental information of Metainference, can in principle achieve both goals. Here we show that three different Metadynamics setups provide converged estimate of the populations of the three-states populated by a model peptide. Errors are estimated correctly by block averaging, but higher precision is obtained by performing independent replicates. One effect of Metadynamics is that of dramatically decreasing the number of effective frames resulting from the simulations and this is relevant for M&M where the number of replicas should be large enough to capture the conformational heterogeneity behind the experimental data. Our simulations allow also us to propose that monitoring the relative error associated with conformational averaging can help to determine the minimum number of replicas to be simulated in the context of M&M simulations. Altogether our data provides useful indication on how to generate sound conformational ensemble in agreement with experimental data.

scholarly journals Numerical Approach for the Estimation of Throat Heat Flux in Liquid Rocket Engines

2020 ◽  
Author(s):  
P. Concio ◽  
M. T. Migliorino ◽  
F. Nasuti
Keyword(s):  
Experimental Data ◽  
Heat Flux ◽  
Numerical Models ◽  
Numerical Approach ◽  
Experimental Information ◽  
Correct Prediction ◽  
Rocket Engines ◽  
Liquid Rocket Engines ◽  
Liquid Rocket

Abstract The problem of prediction of heat flux at throat of liquid rocket engines still constitutes a challenge, because of the little experimental information. Such a problem is of obvious importance in general, and becomes even more important when considering reusable engines. Unfortunately, only few indirect experimental data are available for the validation of throat heat flux prediction. On the numerical side, a detailed solution would require a huge resolution and codes able to solve at the same time combustion, boundary layer with possible finite-rate reactions, expansion up to at least sonic speed, and in some cases radiative heat flux. Therefore, it is important to validate, with the few experimental data available in the literature, simplified CFD approaches whose aim is to predict heat flux in the nozzle in affordable times. Results obtained by different numerical models based on a RANS approach show the correctness and quality of the approximations made, indicating the main phenomena to be included in modeling for the correct prediction of throat heat flux.

Full-field numerical differentiation

1978 ◽  
Vol 13 (3) ◽  
pp. 177-183 ◽  
Author(s):  
R E Rowlands ◽  
K D Winters ◽  
J A Jensen
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Regression Analysis ◽  
Numerical Differentiation ◽  
Experimental Information ◽  
Numerical Representation ◽  
Spline Regression ◽  
Full Field ◽  
Independent Variables ◽  
Two Independent Variables

The numerical representation and differentiation of experimental information is extended to full-field capability involving two independent variables. Bicubic spline, regression analysis and finite-element concepts are employed. Smoothing of the experimental data is accomplished mathematically. The technique are demonstrated by analysing loaded plates.

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