A measurement of π-p→K0sK0sn at 22 GeV/c and a systematic study of the 2++ meson spectrum

A coupled channel analysis has been carried out using a new amplitude analysis of the K⁰sK⁰s system produced in the reaction π^-p→K⁰sK⁰sn at 22 GeV/c, which contained about 40 000 new events in the low-t region (|t-tmin|<0.1 GeV²). Here only the I^G=0⁺, J^PC=2⁺⁺ amplitude from this analysis is considered, together with available data from other experiments in channels with the same quantum numbers in order to determine which 2⁺⁺ isoscalar mesons have significant pseudoscalar-pseudoscalar couplings. It is found that four poles, f(1270), f'(1525), θ(1690), and fr(1810), are needed, plus a smooth background in order to fit these data; the need for the θ(1690) depends on the J/ψ radiative decay alone, and the fr(1810) is seen only in hadronic production. © 1986.

Duke Scholars

Author Alfred T. Goshaw Physics