Techniques For using Gaussian QCD sum-rules to predict hadronic resonance properties are developed fur single-resonance and two-resonance phenomenological models, and criteria are developed fur determining which of these models is required for analyzing a particular hadronic channel. The vector current sum-rule coupled to the rho meson is shown to be consistent with a single resonance model, and the Gaussian sum-rule analysis results in an accurate rho mass prediction which exhibits excellent agreement between the theoretical prediction of the Gaussian sum-rule and the phenomenological model. A two-resonance model is shown to be necessary for the Gaussian sum-rule for the nonstrange quark scalar (lin) currents. The two-resonance Gaussian sum-rule analysis of the isoscalar and isovector (I = 0, 1) nn scalar mesons exhibits excellent agreement between the theoretical prediction and phenomenological model. The prediction of the resonance properties of the I = 0, 1 (n) over barn scalar mesons in this two-resonance model provides valuable information for the interpretation of the scaler mesons, including the X(1775). (C) 2001 Elsevier Science B.V. All rights reserved.

Gaussian Sum-rules and Prediction of Resonance Properties

Orlandini, Giuseppina;
2001-01-01

Abstract

Techniques For using Gaussian QCD sum-rules to predict hadronic resonance properties are developed fur single-resonance and two-resonance phenomenological models, and criteria are developed fur determining which of these models is required for analyzing a particular hadronic channel. The vector current sum-rule coupled to the rho meson is shown to be consistent with a single resonance model, and the Gaussian sum-rule analysis results in an accurate rho mass prediction which exhibits excellent agreement between the theoretical prediction of the Gaussian sum-rule and the phenomenological model. A two-resonance model is shown to be necessary for the Gaussian sum-rule for the nonstrange quark scalar (lin) currents. The two-resonance Gaussian sum-rule analysis of the isoscalar and isovector (I = 0, 1) nn scalar mesons exhibits excellent agreement between the theoretical prediction and phenomenological model. The prediction of the resonance properties of the I = 0, 1 (n) over barn scalar mesons in this two-resonance model provides valuable information for the interpretation of the scaler mesons, including the X(1775). (C) 2001 Elsevier Science B.V. All rights reserved.
2001
1-4
Orlandini, Giuseppina; T., Steele; D., Harnett
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/73315
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