The spectrum of the glueball with JPC=0−− is computed using different
bottom-up holographic models of QCD. The results indicate a lowest-lying state
lighter than in the determination by other methods, with mass m≃2.8
GeV. The in-medium properties of this gluonium are investigated, and stability
against thermal and density effects is compared to other hadronic systems.
Production and decay modes are identified, useful for searching the
JPC=0−− glueball.Comment: 16 pages, 9 figures, 3 table