Hadron form factors and large-Nc phenomenology
  The half width rule provides a way to consider 1/Nc corrections to hadronic models containing resonances. Consequences of such ideas for hadron form factors and Regge trajectories are explored, with special emphasis on the possibility to describe the spectrum of light and heavy unflavored vector mesons in a universal way. 
Pere Masjuan, Enrique Ruiz Arriola, and Wojciech Broniowski
hep-ph nucl-th