Phys. Rev. Lett. 79, 1630–1633 (1997)Evidence for Exotic Meson Production in the Reaction π-p→ηπ-p at 18GeV/cReceived 9 May 1997; published in the issue dated 1 September 1997 The ηπ- system has been studied in the reaction π-p→ηπ-p at 18GeV/c. A large asymmetry in the angular distribution is observed indicating interference between L-even and L-odd partial waves. The a2(1320) is observed in the JPC = 2++ wave, as is a broad enhancement between 1.2 and 1.6GeV/c2 in the 1-+ wave. The observed phase difference between these waves shows that there is phase motion in addition to that due to a2(1320) decay. The data can be fitted by interference between the a2(1320) and an exotic 1-+ resonance with M = (1370±16{+50}{-30})MeV/c2 and γ = (385±40-105+65)MeV/c2. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.1630
DOI:
10.1103/PhysRevLett.79.1630
PACS:
13.85.Fb, 12.39.Mk, 14.40.Cs
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