Exotic and qq-bar resonances in the pi+pi-pi- system produced in pi-p collisions at 18 GeV/c

Journal Article · Fri Mar 01 00:00:00 EST 2002 · Phys. Rev. D 65, 072001 (2002)

OSTI ID:793147

Chung, S U; Danyo, K; Hackenburg, R W; Olchanski, C; Suh, J S; Willutzki, H J; Denisov, S P; Dorofeev, V; Lipaev, V V; Popov, A V; Ryabchikov, D I; Bar-Yam, Z; Dowd, J P; Eugenio, P; Hayek, M; Kern, W; King, E; Shenhav, N; Bodyagin, V A; Kodolova, O L ; Korotkikh, V L; Kostin, M A; Ostrovidov, A I; Sarycheva, L I; Vardanyan, I N; Yershov, A A; Brown, D S; Fan, X L; Joffe, D; Pedlar, T K; Seth, K K; Tomaradze, A; Adams, T; Bishop, J M; Cason, N M; Ivanov, E I; LoSecco, J M; Manak, J J; Shephard, W D; Stienike, D L; Taegar, S A; Adams, G S; Cummings, J P; Hu, J; Kuhn, J; Lu, M; Napolitano, J; White, D B; Witkowski, M; Nozar, M; Shen, X; Weygand, D P

A partial-wave analysis of the reaction pi{sup -}p-->pi{sup +}pi{sup -}pi{sup -}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 a{sub 1}(1260), a{sub 2}(1320) and pi{sub 2}(1670) resonant states are observed. The existence of the pi(1800), a{sub 1}(1700) and a{sub 4}(2040) states is confirmed. The a{sub 3}(1874) state is also observed. The exotic 1{sup -+} pi{sub 1}(1600) state produced in the natural parity exchange process is found to decay in the rho(770)pi{sup -} channel. A mass-dependent fit results in a resonance mass of 1593{+-}8{sub -47}{sup +29} MeV/c{sup 2} and a width of 168{+-}20{sub -12}{sup +150} MeV/c{sup 2}.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 793147
• Report Number(s): JLAB-PHY-01-34; DOE/ER/40150-2044; TRN: US0200938
• Journal Information: Phys. Rev. D 65, 072001 (2002), Other Information: PBD: 1 Mar 2002
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DECAY
MESONS
PARITY