A partial-wave analysis of 9082 ηπ+π-n events produced in the reaction π-p→ηπ+π-n at 18.3 GeV/c has been carried out using data from experiment 852 at Brookhaven National Laboratory. The data are dominated by JPC=0-+ partial waves consistent with observation of the η(1295) and the η(1440). The mass and width of the η(1295) were determined to be 1282±5 MeV and 66±13 MeV, respectively, while the η(1440) was observed with a mass of 1404±6 MeV and a width of 80±21 MeV. Other partial waves of importance include the 1++ and the 1+- waves. Results of the partial wave analysis are combined with results of other experiments to estimate f1(1285) branching fractions. These values are considerably different from current values determined without the aid of amplitude analyses.
|Original language||English (US)|
|Number of pages||8|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Jul 1 2000|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)