INVESTIGATION OF THE DIFFRACTIVE REACTION PI(-)A-]ETA-ETA-PI(-)A AT AN INCIDENT P(PI-) MOMENTUM OF 37 GEV C/

Authors
AMELIN DV BERDNIKOV EB BITYUKOV SI BORISOV GV VISHNEVSKY NK VLASOV EV GOUZ YP DOROFEEV VA DZHELYADIN RI EKIMOV AV ZAITSEV AM IVANYUSHENKOV YM KARYUKHIN AN KACHAEV IA KLYUCHNIKOV GA KONSTANTINOV VF KOPIKOV SV KOSTRIKOV ME KOSTYUKHIN VV KRIUSHIN AA LOMTADZE TA MATVEEV VD OSTANKOV AP RYABCHIKOV DI SOLOVIANOV OV STARCHENKO EA KHOKHLOV YA TSKHADADZE EG
Citation
Dv. Amelin et al., INVESTIGATION OF THE DIFFRACTIVE REACTION PI(-)A-]ETA-ETA-PI(-)A AT AN INCIDENT P(PI-) MOMENTUM OF 37 GEV C/, Physics of atomic nuclei, 59(6), 1996, pp. 976-981
Citations number
17
Categorie Soggetti
Physics, Nuclear","Physics, Particles & Fields
Journal title
Physics of atomic nuclei → ACNP
ISSN journal
10637788
Volume
59
Issue
6
Year of publication
1996
Pages
976 - 981
Database
ISI
SICI code
1063-7788(1996)59:6<976:IOTDRP>2.0.ZU;2-F
Abstract
The diffractive production of the eta eta pi(-) system by pi(-) mesons on beryllium nuclei is investigated with a VES detector. The mass spe ctrum in the range M(eta eta pi)(-)=1.5-2.0 GeV is found to be dominat ed by the J(PC)=0(+) wave in the a(0)(-)(980)eta channel. This wave ha s a resonant behavior with parameters M=1840+/-10(stat)+/-10(syst.)MeV and gamma=210+/-30(stat.)+/-30(syst.)MeV. A structure observed in the eta eta mass spectrum may be described in terms of an isobar state wi th quantum numbers J(P)=0(+) and parameters M approximate to 1460 MeV and (G)amma approximate to 100 MeV.