2017/08/12 by Giacosa, Francesco
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1708.03755
Glueballs, an old and firm prediction of various QCD approaches (lattice QCD, bag models, AdS/QCD, effective models, etc.), have not yet been experimentally confirmed. While for glueballs below 2.6 GeV some candidates exist, the situation for heavy glueballs (above 2.6 GeV) is cloudy. Here, after a brief review of scalar, tensor, and pseudoscalar glueballs, we present predictions for the decays of a putative pseudotensor glueball with a lattice predicted mass of 3.04 GeV and a putative vector glueball with a lattice predicted mass of 3.81 GeV. Moreover, we discuss in general the width of heavy glueballs by using large-Nc arguments: we obtain a rough estimate according to which the width of a glueball (such as the vector one) is about 10 MeV. Such a width would be narrow enough to enable measurement at the future PANDA experiment.