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

18 Scopus citations

Abstract

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
Volume541
Issue number1-2
DOIs
StatePublished - Aug 8 2002

Funding

We are grateful to the members of the Brookhaven MPS group for their outstanding support in running this experiment. We wish to dedicate this Letter to the memory of our recently deceased colleague, H.J. Willutzki. This research was supported in part by the US Department of Energy, the US National Science Foundation, and the Russian Ministry of Industry and Science.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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