The finite-width Laplace sum rules for $0^{ }$ scalar glueball in instanton liquid model - High Energy Physics - PhenomenologyReport as inadecuate




The finite-width Laplace sum rules for $0^{ }$ scalar glueball in instanton liquid model - High Energy Physics - Phenomenology - Download this document for free, or read online. Document in PDF available to download.

Abstract: In the framework of a semi-classical expansion for quantum chromodynamics inthe instanton liquid background, the correlation function of the $0^{++}$scalar glueball current is given. Besides the pure classical and quantumcontributions, the contributions arising from the interactions between theclassical instanton fields and quantum gluons are taken into account as well.Instead of the usual zero-width approximation for the resonance, theBrite-Wigner form for the spectral function of the finite-width resonance isadopted. The family of the Laplace sum rules for the scalar glueball in quantumchromodynamics with and without light quarks are studed. A consistency betweenthe subtracted and unsubtracted sum rules are very well justified, and thevalues of the mass, decay width, and the coupling to the corresponding currentfor the $0^{++}$ resonance in which the glueball fraction is dominant, areobtained.



Author: Shuiguo Wen, Zhenyu Zhang, Jueping Liu

Source: https://arxiv.org/



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