A study of the reaction π-p → ωπ-p at 18 GeV/c: The D and S decay amplitudes for b1(1235) → ωπ

M. Nozar*, 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. P. Denisov, V. Dorofeev, J. P. Dowd, P. Eugenio, X. L. Fan, A. M. Gribushin, R. W. Hackenburg, M. HayekJ. Hu, E. I. Ivanov, D. Joffe, I. Kachaev, 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, J. Napolitano, C. Olchanski, A. I. Ostrovidov, T. K. Pedlar, A. V. Popov, D. I. Ryabchikov, L. I. Sarycheva, K. K. Seth, 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

17 Scopus citations


The reaction π-p → ωπ-p, ω → π+π-π0 has been studied at 18 GeV/c. The ωπ- mass spectrum is found to be dominated by the b1(1235). Partial Wave Analysis (PWA) shows that b1 production is dominated by natural parity exchange. The S-wave and D-wave amplitudes for b1 (1235) → ωπ have been determined, and it is found that the amplitude ratio, |D/S| = 0.269 ± (0.009)stat ± (0.01)sys and the phase difference, φ(D - S) = 10.54° ± (2.4°)stat ± (3.9°)sys.

Original languageEnglish (US)
Pages (from-to)35-44
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - Aug 8 2002

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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