Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-03-07
Phys. Atom. Nucl. 73: 1770-1780, 2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages
Scientific paper
10.1134/S1063778810100121
The procedure of extracting the ground-state parameters from vacuum-to-vacuum and vacuum-to-hadron correlators within the method of sum rules is considered. The emphasis is laid on the crucial ingredient of this method - the effective continuum threshold. A new algorithm to fix this quantity is proposed and tested. First, a quantum-mechanical potential model which provides the only possibility to probe the reliability and the actual accuracy of the sum-rule method is used as a study case. In this model, our algorithm is shown to lead to a remarkable improvement of the accuracy of the extracted ground-state parameters compared to the standard procedures adopted in the method and used in all previous applications of dispersive sum rules in QCD. As a next step, it is demonstrated that the procedures of extracting the ground-state decay constant in the potential model and in QCD are quantitatively very close to each other. Therefore, the application of the proposed algorithm in QCD promises a considerable increase of the accuracy of the extracted hadron parameters.
Lucha Wolfgang
Melikhov Dmitri
Simula Silvano
No associations
LandOfFree
Extraction of bound-state parameters from dispersive sum rules does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Extraction of bound-state parameters from dispersive sum rules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extraction of bound-state parameters from dispersive sum rules will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-668058