Study of the reaction π–A π{sup +}π{sup –}π{sup –}A at large statistics with VES setup

Journal Article · Tue Dec 15 00:00:00 EST 2015 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778815130153· OSTI ID:22471861

Dorofeev, V.; Ekimov, A.; Gotman, V.; Ivashin, A.; Kalendarev, V.; Khokhlov, Yu.; Kholodenko, M.; Konstantinov, V.; Matveev, V. ^[1]; Mikhasenko, M. ^[2]; Nikolaenko, V.; Plekhanov, A.; Ryabchikov, D.; Salomatin, Yu.; Sugonyaev, V.; Volkov, E.; Zaitsev, A. ^[1]

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1. IHEP (Russian Federation)
2. Helmholtz-Institut fur Strahlenund Kernphysik (Germany)

Partial wave analysis of the π–A π{sup +}π{sup –}π{sup –} system produced by 29 GeV/cπ{sup –} beam on a beryllium target is presented. About 30 × 10{sup 6} vertical bar events in the wide t′ vertical bar range 0–0.8 GeV{sup 2}/c{sup 2} are collected with upgraded VES setup. The size of the data sample is 2.5 times larger than one previously analyzed by VES. Data are analyzed using formalism of the density matrix with unlimited rank. We discuss status of the a{sub 1}(1420) a{sub 2}(1700) a{sub 3}(1875) states and a structure of exotic ρ(770)π P-wave with J{sup PC} = 1{sup -+}. Parameters of a{sub 3}(1875) are estimated as M = 1985 ± 20 MeV/c{sup 2}, Γ = 200 ± 50 MeV/c{sup 2} (preliminary)

• OSTI ID: 22471861
• Journal Information: Physics of Atomic Nuclei, Vol. 78, Issue 13; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A2-1320 MESONS
BERYLLIUM 9 TARGET
DENSITY MATRIX
GEV RANGE
MEV RANGE
P WAVES
PION REACTIONS
PIONS MINUS
PIONS PLUS
RHO-770 MESONS