The spin of the $f_J(1710)$ and new effects observed in the WA102 experiment

TL;DR

This paper presents a partial wave analysis of meson production revealing the spin of the fJ(1710) and identifies new effects in meson production related to transverse momentum differences and azimuthal angles.

Contribution

It provides the first determination of the spin of the fJ(1710) and uncovers new production effects related to transverse momentum and azimuthal angle dependencies.

Findings

fJ(1710) has J=0 from partial wave analysis

qqbar mesons are suppressed at small dPT

Glueball candidates are enhanced at small dPT

Abstract

A partial wave analysis of the centrally produced KK and pipi systems shows that the fJ(1710) has J = 0. In addition, a study of central meson production as a function of the difference in transverse momentum (dPT) of the exchanged particles shows that undisputed qqbar mesons are suppressed at small dPT whereas the glueball candidates are enhanced and that the production cross section for different resonances depends strongly on the azimuthal angle between the two outgoing protons.