A partial-wave analysis of the reaction π-p→π+π-π-p at 18 GeV/c has been performed on a data sample of 250 000 events obtained in the Brookhaven experiment E852. The well-known a1 (1260), a2(1320) and π2(1670) resonant states are observed. The existence of the π(1800), a1(1700) and a4(2040) states is confirmed. The a3(1874) state is also observed. The exotic 1-+π1(1600) state produced in the natural parity exchange process is found to decay in the p(770)π- channel. A mass-dependent fit results in a resonance mass of 1593±8-47+29 MeV/c2 and a Width of 168±20-12+150 MeV/c2.
|Original language||English (US)|
|Number of pages||6480106|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Issue number||7 A|
|State||Published - Apr 1 2002|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)