Fluctuations of Particle Ratios and the Abundance of Hadronic Resonances

S. Jeon, V. Koch
1999 Physical Review Letters  
In this letter we will argue that the event-by-event fluctuations of the ratio of positively over negatively charged pions provides a measurements of the number of rho and omega mesons right after hadronization. This finding can be utilized to put the hypothesis of chemical equilibration in relativistic heavy ion collisions to a test.
doi:10.1103/physrevlett.83.5435 fatcat:ykzhurzh6bh6bai3kiypg72aly