Observation of resonances in the reaction (p)over-bar-p ->pi(0)eta eta at 1.94 GeV/c

Citation
A. Abele et al., Observation of resonances in the reaction (p)over-bar-p ->pi(0)eta eta at 1.94 GeV/c, EUR PHY J C, 8(1), 1999, pp. 67-79
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
8
Issue
1
Year of publication
1999
Pages
67 - 79
Database
ISI
SICI code
1434-6044(199904)8:1<67:OORITR>2.0.ZU;2-S
Abstract
Antiproton-proton annihilation into pi(o)eta eta has been studied with the Crystal Barrel spectrometer at CERN at an incident beam momentum of 1.94 Ge V/c. The data were taken with a trigger requiring neutral final states. A n ew isovector state, the alpha(2)(1660) decaying to pi(o)eta, is observed. I n the eta eta invariant mass region around 2.1 GeV/c(2), strong production of a heavy resonance is required, but our analysis does not distinguish bet ween J(P) = 0(+), 2(+) and 4(+). The production of the fo(1500) in reaction s in flight is also observed.