Observation of the scalar G(1590) meson which decays into two eta mesons

Journal Article · Sat Oct 01 04:00:00 EDT 1983 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6650249

Binon, F; Gouanere, M; Donskov, S V; Duteil, P; Inyakin, A V; Kakauridze, D B; Kachanov, V A; Kulik, A V; Lagnaux, J P; Lednev, A A

In order to search for gluons, we have studied the properties of etaeta systems produced in ..pi../sup -/p collisions at 38 GeV/c. The experiment was carried out in the 70-GeV accelerator at the Institute of High Energy Physics by means of the hodoscopic spectrometer GAMS-2000. An S-wave resonance with mass 1592 +- 25 MeV/c/sup 2/ and width GAMMA = 210 +- 40 MeV/c/sup 2/ has been observed in the decay mode into two eta mesons. The quantum numbers of the observed G(1590) meson have been determined: J/sup P/C = 0/sup + +/, I/sup G/ = 0/sup +/. The decay G(1590)..--> pi../sup 0/..pi../sup 0/ is not observed at a level three times lower than G(1590)..-->..etaeta. We have measured the cross section for production of the G(1590) meson sigma(..pi../sup -/p..-->..Gn)xBR(G..-->..etaeta) = (33 +- 8)x10/sup -33/ cm/sup 2/. The properties of this particle as a possible bound state of gluons are discussed. In the same experiment the rare decay of the f meson into two eta mesons is observed for the first time. Its partial width is found to be BR(f..-->..etaeta) = (5.2 +- 1.7)x10/sup -3/.

• Research Organization: Serpuknov-Brussels-Annecy Collaboration and Joint Experiment of the Institute of High Energy Physics, Serpukhov, USSR, and CERN, Geneva, Switzerland
• OSTI ID: 6650249
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 38:4; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

645104* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BOSONS
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
ETA MESONS
F-1260 RESONANCES
GEV RANGE
GEV RANGE 10-100
GLUONS
HADRON-HADRON INTERACTIONS
HADRONIC PARTICLE DECAY
HADRONS
INTERACTIONS
ISOSPIN
MESON RESONANCES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
PARTIAL WAVES
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE WIDTHS
PION MINUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
S WAVES
SCALAR MESONS
SPIN
TENSOR MESONS