Observation of pseudoscalar and axial vector resonances in π- p → K+K-π0n at 18 GeV

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


The number of pseudoscalar mesons in the mass range from 1400 to 1500 MeV/c2 has been a subject of considerable interest for many years, with several experiments having presented evidence for two closely spaced states. A new measurement of the reaction π- p → K+K-π0n has been made at a beam energy of 18 GeV. A partial wave analysis of the K+K-π0 system shows evidence for three pseudoscalar resonances, η(1295), η(1416), and η(1485), as well as two axial vectors, f1(1285), and f1(1420). Their observed masses, widths and decay properties are reported. No signal was observed for C(1480), an IGJPC = 1+1-- state previously reported in øπ0 decay.

Original languageEnglish (US)
Pages (from-to)264-272
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - Sep 20 2001

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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