New effects observed in central production by experiment WA102 at the CERN Omega Spectrometer

TL;DR

This paper reports new observations in central meson production at CERN, revealing the quantum numbers of the fJ(1710) and how production varies with kinematic variables, shedding light on meson structure.

Contribution

It provides the first partial wave analysis confirming the J=0 assignment of the fJ(1710) and explores how production mechanisms depend on transverse momentum differences and azimuthal angles.

Findings

fJ(1710) has J=0 quantum numbers

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.