scholarly journals QCD sum rule study of a charged bottom-strange scalar meson

2016 ◽  
Vol 93 (9) ◽  
Author(s):  
C. M. Zanetti ◽  
M. Nielsen ◽  
K. P. Khemchandani
Keyword(s):  
Scalar Meson ◽  
Sum Rule

Mass of the Scalar Meson kappa within a QCD Sum Rule

2010 ◽  
Vol 60 (6) ◽  
pp. 648-652
Author(s):  
Hee Jung LEE*
Keyword(s):  
Scalar Meson ◽  
Sum Rule

scholarly journals TESTING THE STRUCTURE OF THE SCALAR MESON $K_0^*(1430)$ IN $\tau\to K_0^*(1430)\nu$ DECAY

2006 ◽  
Vol 21 (20) ◽  
pp. 1625-1628 ◽  
Author(s):  
MAO-ZHI YANG
Keyword(s):  
Production Rate ◽  
Decay Constant ◽  
Scalar Meson ◽  
Branching Ratio ◽  
Bound State ◽  
Sum Rule

The decay constant of [Formula: see text] is the key quantity to determine the production rate of [Formula: see text] in τ decays. By assuming [Formula: see text] is the lowest scalar bound state of [Formula: see text], the decay constant can be calculated reliably in QCD sum rule. Then the decay branching ratio of [Formula: see text] is predicted to be about (7.9±3.1)×10-5. If this branching ratio can be measured by experiment, it should be helpful to make clear the structure of [Formula: see text].

scholarly journals Mass and decay constant of I=1/2 scalar meson in QCD sum rule

2005 ◽  
Vol 619 (1-2) ◽  
pp. 105-114 ◽  
Author(s):  
Dong-Sheng Du ◽  
Jing-Wu Li ◽  
Mao-Zhi Yang
Keyword(s):  
Decay Constant ◽  
Scalar Meson ◽  
Sum Rule

scholarly journals Cwebs beyond three loops in multiparton amplitudes

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Neelima Agarwal ◽  
Lorenzo Magnea ◽  
Sourav Pal ◽  
Anurag Tripathi
Keyword(s):  
Gauge Theories ◽  
Anomalous Dimension ◽  
Wilson Line ◽  
Building Blocks ◽  
Feynman Diagrams ◽  
Loop Order ◽  
Abelian Gauge ◽  
Sum Rule ◽  
Combinatorial Properties ◽  
Low Dimensional

Abstract Correlators of Wilson-line operators in non-abelian gauge theories are known to exponentiate, and their logarithms can be organised in terms of collections of Feynman diagrams called webs. In [1] we introduced the concept of Cweb, or correlator web, which is a set of skeleton diagrams built with connected gluon correlators, and we computed the mixing matrices for all Cwebs connecting four or five Wilson lines at four loops. Here we complete the evaluation of four-loop mixing matrices, presenting the results for all Cwebs connecting two and three Wilson lines. We observe that the conjuctured column sum rule is obeyed by all the mixing matrices that appear at four-loops. We also show how low-dimensional mixing matrices can be uniquely determined from their known combinatorial properties, and provide some all-order results for selected classes of mixing matrices. Our results complete the required colour building blocks for the calculation of the soft anomalous dimension matrix at four-loop order.

Raman sum rule and the relation to the infrared sum rule in La2-xSrxCuO4

2010 ◽  
Vol 470 ◽  
pp. S97-S98 ◽  
Author(s):  
S. Sugai ◽  
Y. Takayanagi ◽  
N. Hayamizu ◽  
T. Muroi ◽  
J. Nohara ◽  
...  
Keyword(s):  
Sum Rule
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