The phenomenology of the exotic hybrid nonet with ,[object Object], ,[object Object],(1600) and ,[object Object], ,[object Object],(1855)
Vanamali Shastry (Institute of Physics, Jan Kochanowski University, ul. Uniwersytecka 7, P-25-406 Kielce, Poland)
; Christian S. Fischer (Institut für Theoretische Physik, Justus-Liebig Universität Gießen, 35392 Gießen, Germany, Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI Helmholtzzentrum für Schwerionenforschung, Campus Gießen, 35392 Gießen, Germany); Francesco Giacosa (Institute of Physics, Jan Kochanowski University, ul. Uniwersytecka 7, P-25-406 Kielce, Poland, Institute for Theoretical Physics, Johann Wolfgang Goethe - University, Max von Laue–Str. 1, D-60438 Frankfurt, Germany)
We study the decays of the hybrid nonet using a Lagrangian invariant under the flavor symmetry, parity reversal, and charge conjugation. We use the available experimental data, the lattice predictions, and the flavor constraints to evaluate the coupling strengths of the to various two-body mesonic states. Using these coupling constants, we estimate the partial widths of the two-body decays of the hybrid pion, kaon and the isoscalars. We find that the hybrid kaon can be nearly as broad as the . Quite remarkably, we find also that the light isoscalar must be significantly narrow while the width of the heavy isoscalar can be matched to the recently observed .