In search of scalar gluonium |
| |
Authors: | V.A. Novikov M.A. Shifman A.I. Vainshtein V.I. Zakharov |
| |
Affiliation: | Institute of Theoretical and Experimental Physics, Moscow 117259, USSR |
| |
Abstract: | We discuss a scalar meson coupled strongly to gluons. Radiative decays of the J/ψ are taken as a source of gluons so that our aim is to calculate Γ(J/ψ→σγ), where σ is the presumed scalar gluonium. We use QCD sum rules to find both 〈0|αsGμνaGμνa|σ〉 (where Gμνa is the gluon field strength tensor) and Γ(J/ψ→σγ) in terms of 〈0|αsGμνaGμνa|σ〉. The final prediction for the width is expected to be valid within a factor of two and gives . Non-perturbative QCD naturally explains the observed asymmetry between scalar and pseudoscalar states in the radiative decays of the J/ψ. Some general remarks on gluonium in QCD are made. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |