A study of the KKbarpi channel produced centrally in pp interactions at 450 GeV/c

TL;DR

This paper reports on the analysis of pp collision data at 450 GeV/c, identifying specific meson states and their decay modes, and examining their quantum numbers and production characteristics.

Contribution

It provides new experimental evidence on the production and decay modes of f1(1285), f1(1420), and eta2(1620) mesons in pp interactions at high energy.

Findings

Identification of f1(1285) and f1(1420) signals with specific decay modes.

Quantum number analysis confirming JPC=0+ 1++ for both states.

Evidence for K*Kbar decay mode of eta2(1620).

Abstract

Results are presented of an analysis of the reactions pp -> pf(k0k+pi-)ps and pp -> pf(K0K0pi0)ps at 450 GeV/c. Clear f1(1285) and f1(1420) signals are seen and a spin parity analysis shows that both have IG JPC=0+ 1++. The f1(1285) decays to a0(980)pi and the f1(1420) decays to K* Kbar. Both states have a similar dependence as a function of dPT consistent with what has been observed for other qqbar states. Evidence is also presented for a K*Kbar decay mode of the eta2(1620).