A partial wave analysis of the centrally produced K+K- and K0K0 systems in pp interactions at 450 GeV/c and new information on the spin of the fJ(1710)

TL;DR

This paper performs a partial wave analysis of K+K- and K0K0 systems produced in proton-proton collisions at 450 GeV/c, revealing peaks corresponding to specific mesons and providing new insights into the spin of the fJ(1710).

Contribution

It presents the first unambiguous partial wave analysis of these channels at this energy, clarifying the meson contributions and the spin assignment of the fJ(1710).

Findings

Peaks observed in the S-wave for f0(1500) and fJ(1710).

Evidence for f2(1270)/a2(1320), f2(1525), and f2(2150) in D-wave.

No significant D-wave contribution in the 1.7 GeV mass region.

Abstract

A partial wave analysis of the centrally produced K+K- and K0K0 channels has been performed in pp collisions using an incident beam momentum of 450 GeV/c. An unambiguous physical solution has been found in each channel. The striking feature is the observation of peaks in the S-wave corresponding to the f0(1500) and fJ(1710) with J = 0. The D-wave shows evidence for the f2(1270)/a2(1320), the f2(1525) and the f2(2150) but there is no evidence for a statistically significant contribution in the D-wave in the 1.7 GeV mass region.