Observation of the π(1800) and π2(1880) mesons in η η π- decay

P. Eugenio, A. I. Ostrovidov*, 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, S. P. Denisov, V. Dorofeev, J. P. Dowd, X. L. Fan, A. M. Gribushin, R. W. Hackenburg, M. Hayek, J. HuE. I. Ivanov, D. Joffe, W. Kern, E. King, O. L. Kodolova, V. L. Korotkikh, M. A. Kostin, J. Kuhn, V. V. Lipaev, J. M. LoSecco, M. Lu, J. J. Manak, M. Nozar, C. Olchanski, T. K. Pedlar, A. V. Popov, D. I. Ryabchikov, L. I. Sarycheva, K. K. Seth, B. Sharin, N. Shenhav, X. Shen, W. D. Shephard, N. B. Sinev, D. L. Stienike, J. S. Suh, S. A. Taegar, A. Tomaradze, I. N. Vardanyan, D. P. Weygand, D. B. White, H. J. Willutzki, M. Witkowski, A. A. Yershov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A partial-wave analysis of the reaction π- p → η η π- p at 18 GeV/c has been performed on a data sample of approximately 4000 events obtained by Brookhaven experiment E852. The JP C = 0- + π (1800) state is observed in the a0 (980) η and f0 (1500) π decay modes. It has a mass of 1876 ± 18 ± 16 MeV / c2 and a width of 221 ± 26 ± 38 MeV / c2. The JP C = 2- + π2 (1880) meson is observed decaying through a2 (1320) η. It has a mass of 1929 ± 24 ± 18 MeV / c2 and a width of 323 ± 87 ± 43 MeV / c2. Both states are potential candidates for non-exotic hybrid mesons.

Original languageEnglish (US)
Pages (from-to)466-470
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume660
Issue number5
DOIs
StatePublished - Mar 6 2008

Keywords

  • Hybrid mesons
  • Meson spectroscopy
  • Partial wave analysis

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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