K. Danyo

Evidence for exotic J(PC) = 1-+ meson production in the reaction pi- p ---> eta pi- p at 18-GeV/c

Details of the analysis of the eta pi- system studied in the reaction pi^{-} p -->eta pi^{-} p at 18 GeV/c are given. Separate analyses for the 2 gamma and pi+ pi- pi0 decay modes of the eta are presented. An amplitude analysis of the data indicates the presence of interference between the a(2)(1320)- and a J^{PC}=1^{-+} wave between 1.2 and 1.6 GeV/c^2. The phase difference between these waves shows phase motion not attributable solely to the a(2)(1320)-. The data can be fitted by interference between the a(2)(1320)- and an exotic 1^{-+} resonance with M = 1370 +-16 +50 -30} MeV/c^2 and Gamma = 385 +- 40 +65 -105 MeV/c^2. Our results are compared with those of other experiments.

Exotic meson decay to ωπ0π

A partial-wave analysis of the mesons from the reaction

Partial wave analysis of the pi(0) pi(0) system produced in pi(-)p charge exchange collisions

\pi^{-}% p\to\pi^{+}\pi^{-}\pi^{-}\pi^{0}\pi^{0}p

Partial wave analysis of theπ0π0system produced inπ−pcharge exchange collisions

has been performed. The data show

Exotic meson production in the f1(1285)π− system observed in the reaction π−p→ηπ+π−π−p at 18 GeV/c

b_{1}\pi

Confirmation of the 1−+ meson exotics in the ηπ0 system

decay of the spin-exotic states

Observation of pseudoscalar and axial vector resonances in π−p→K+K−π0n at 18 GeV

\pi_{1}(1600)

Partial-wave analysis of the ηπ+π- system produced in the reaction π-p→ηπ+π-n at 18 GeV/c

and \

Exotic meson production in BNL experiment E852

\pi_{1}(2000)

Exotic meson production in the f(1)(1285) pi- system observed in the reaction pi- p ---> eta pi+ pi- pi- p at 18-GeV/c

. Three isovector