scholarly journals Finite-width Gaussian sum rules for $$0^{-+}$$ 0 - + pseudoscalar glueball based on correction from instanton–gluon interference to correlation function

2015 ◽  
Vol 75 (9) ◽  
Author(s):  
Feng Wang ◽  
Junlong Chen ◽  
Jueping Liu
Keyword(s):  
Correlation Function ◽  
Sum Rules ◽  
Finite Width ◽  
Gaussian Sum

scholarly journals 0++scalar glueball in finite-width Gaussian sum rules

2010 ◽  
Vol 82 (1) ◽  
Author(s):  
Shuiguo Wen ◽  
Zhenyu Zhang ◽  
Jueping Liu
Keyword(s):  
Sum Rules ◽  
Finite Width ◽  
Scalar Glueball ◽  
Gaussian Sum

scholarly journals Finite-width effects on Delta baryons in QCD sum rules

2008 ◽  
Vol 801 (3-4) ◽  
pp. 142-153 ◽  
Author(s):  
G. Erkol ◽  
M. Oka
Keyword(s):  
Sum Rules ◽  
Finite Width ◽  
Qcd Sum Rules

scholarly journals Investigation of the Rare ExclusiveBc*→Dsνν-Decays in the Framework of the QCD Sum Rules

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
V. Bashiry
Keyword(s):  
Correlation Function ◽  
Decay Width ◽  
Sum Rules ◽  
Branching Ratio ◽  
Form Factors ◽  
Gluon Condensate ◽  
Qcd Sum Rules

ExclusiveBc*→Dsνν-decay is studied in the framework of the three-point QCD sum rules approach. The two gluon condensate contributions to the correlation function are calculated and the form factors of this transition are found. The decay width and total branching ratio for this decay are also calculated.

Spectral Properties

2018 ◽  
Author(s):  
Klaus Morawetz
Keyword(s):  
Correlation Function ◽  
Spectral Function ◽  
Spectral Properties ◽  
Sum Rules ◽  
Statistical Weight ◽  
Reduced Density Matrix ◽  
Density Of State ◽  
Shell Motion ◽  
Reduced Density ◽  
Quasiparticle Picture

The spectral properties of the nonequilibrium Green’s functions are explored. Causality and sum rules are shown to be completed by the extended quasiparticle picture. The off-shell motion is seen to become visible in satellite structures of the spectral function. Different forms of ansatz to reduce the two-time Green’s function to a one-time reduced density matrix are discussed with respect to the consistency to other approximations. We have seen from the information contained in the correlation function that the statistical weight of excitations with which the distributions are populated are given by the spectral function. This momentum-resolved density of state can be found by the retarded and advance functions.

D(1±) AND Ds(1±) MESONS SPECTROSCOPY IN GAUSSIAN SUM RULES

2009 ◽  
Vol 18 (01) ◽  
pp. 161-174
Author(s):  
SHUIGUO WEN ◽  
JUEPING LIU
Keyword(s):  
Experimental Data ◽  
Quantum Chromodynamics ◽  
Sum Rules ◽  
Coupling Constants ◽  
Sum Rule ◽  
Gaussian Sum ◽  
Rule Approach

The Gaussian sum rules (GSRs) for the D(1±) and Ds(1±) mesons current are obtained by means of Laplacian transformation. Based on it, the GSRs for the mass and the coupling constants of D(1±) and Ds(1±) mesons are worked out. Using the standard input of quantum chromodynamics nonperturbative parameters, the corresponding curves and tables are presented. The results are in accordance well with the experimental data, and more well than those from the Borel sum rule approach.

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