Evidence for exotic J(PC)=1(-+) meson production in the reaction pi(-)p ->eta pi(-)p at 18 GeV/c - art. no. 092001

Authors
Chung, SU Danyo, K Hackenburg, RW Olchanski, C Weygand, DP Willutzki, HJ Denisov, SP Dorofeev, VA Kachaev, IA Lipaev, VV Popov, AV Ryabchikov, DI Bar-Yam, Z Dowd, JP Eugenio, P Hayek, M Kern, W King, E Shenhav, N Bodyagin, VA Kodolova, OL Korotkikh, VL Kostin, MA Ostrovidov, AI Sarycheva, LI Sinev, NB Brown, DS Pedlar, TK Seth, KK Wise, J Zhao, D Adams, T Bishop, JM Cason, NM Ivanov, EI LoSecco, JM Manak, JJ Sanjari, AH Shephard, WD Stienike, DL Taegar, SA Thompson, DR Adams, GS Cummings, JP Kuhn, J Nozar, M Smith, JA White, DB Witkowski, M
Citation
Su. Chung et al., Evidence for exotic J(PC)=1(-+) meson production in the reaction pi(-)p ->eta pi(-)p at 18 GeV/c - art. no. 092001, PHYS REV D, 6009(9), 1999, pp. 2001
Citations number
58
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6009
Issue
9
Year of publication
1999
Database
ISI
SICI code
0556-2821(19991101)6009:9<2001:EFEJMP>2.0.ZU;2-T
Abstract
Details of the analysis of the eta pi(-) system studied in the reaction pi( -)p-->eta pi(-) p at 18 GeV/c are given. Separate analyses for the 2 gamma and pi(+) pi(-) pi(0) decay modes of the eta are presented. An amplitude an alysis of the data indicates the presence of interference between the a(2)( -)(1320) and a J(PC) = 1(-+) wave between 1.2 and 1.6 GeV/c(2). The phase d ifference between these waves shows a phase motion not attributable solely to the a(2)(-)(1320). The data can be fitted by interference between the a( 2)(-)(1320) and an exotic 1(-+) resonance with M = (1370+/-16(-30)(+50)) Me V/c(2) and Gamma = (385+/-40(-105)(+65)) MeV/c(2). Our results are compared with those of other experiments. [S0556-2821(99)06119-6].