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Remark on the external-field method in QCD sum rules

Remark on the external-field method in QCD sum rules The external-field method has been used extensively in the QCD sum-rule approach to explore various hadron static properties. In the traditional formalism of this method, the transitions from the ground state hadron to excited states are not exponentially suppressed relative to the ground state term and thus contaminate the ground state hadron property to be extracted. In this paper, we suggest a modified formalism, in which the transition terms are exponentially suppressed relative to the ground state term. As such, the pole plus continuum spectral model, traditionally invoked in the QCD sum-rule approach, can be adopted. Thus, this modified formalism has the potential to improve the predictability and reliability of external-field sum-rule calculations, which is illustrated in an explicit example. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Remark on the external-field method in QCD sum rules

Physical Review D , Volume 55 (3) – Feb 1, 1997
4 pages

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Publisher
American Physical Society (APS)
Copyright
Copyright © 1997 The American Physical Society
ISSN
1089-4918
DOI
10.1103/PhysRevD.55.1693
Publisher site
See Article on Publisher Site

Abstract

The external-field method has been used extensively in the QCD sum-rule approach to explore various hadron static properties. In the traditional formalism of this method, the transitions from the ground state hadron to excited states are not exponentially suppressed relative to the ground state term and thus contaminate the ground state hadron property to be extracted. In this paper, we suggest a modified formalism, in which the transition terms are exponentially suppressed relative to the ground state term. As such, the pole plus continuum spectral model, traditionally invoked in the QCD sum-rule approach, can be adopted. Thus, this modified formalism has the potential to improve the predictability and reliability of external-field sum-rule calculations, which is illustrated in an explicit example.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Feb 1, 1997

There are no references for this article.