2008/11/30 by Hai-Yang Cheng, Hsiang-nan Li, Keh-Fei Liu · 82 citations
Physics and Astronomy · #Glueball #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.79.014024
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 79(1) (American Physical Society) · 12 pages no figure, version to appear in PRD
arxiv created 2009/01/11 · openalex publication_date 2009/01/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We deduce the mass of the pseudoscalar glueball G from an \ensuremathη-\ensuremathη^\ensuremath'-G mixing formalism based on the anomalous Ward identity for transition matrix elements. With the inputs from the recent KLOE experiment, we find a solution for the pseudoscalar glueball mass around (1.4\ifmmode±\else\textpm\fi0.1) GeV, which is fairly insensitive to a range of inputs with or without Okubo-Zweig-Iizuka-rule violating effects. This affirms that \ensuremathη(1405), having a large production rate in the radiative J/\ensuremathΨ decay and not seen in \ensuremathγ\ensuremathγ reactions, is indeed a leading candidate for the pseudoscalar glueball. Other relevant quantities including the anomaly and pseudoscalar density matrix elements are obtained. The decay widths for G\ensuremath→\ensuremathγ\ensuremathγ, \ensuremathℓ+\ensuremathℓ^\ensuremath- are also predicted.