New Higher-Statistics Study of pi exp - p Implies phi phi N and Evidence for Glueballs

摘要

We have obtained 1203 events of the reaction pi exp - implies phi phi n at 22 GeV/c over a small background (approx. 10%). As in our prior experiment the OZI suppression was essentially entirely absent. A partial wave analysis allowing waves up to J = 4 and L = 3 demonstrated that a good fit was obtained with 2 waves, each well described by a Breit-Wigner resonance. The addition of another wave one at a time in turn, resulted in no statistical significance for the wave. Because of the complete breakdown of the OZI suppression, and other characteristics of the data, these two resonances are strong glueball candidates. All the quantum numbers were determined and are given together with the masses and widths. The glueball candidates given provide strong evidence for one or more primary glueballs in this mass region. (ERA citation 08:006368)