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Partial-wave analysis of theηπ+π−system produced in the reactionπ−p→ηπ+π−nat18 GeV/c

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields2000Vol. 62(1)

Citations Over TimeTop 18% of 2000 papers

J. J. Manak, T. Adams, J.M. Bishop, N. M. Cason, E. I. IVANOV, J. M. LoSecco, A.H. Sanjari, W. D. Shephard, D.L. Stienike, S. A. Taegar, David R. Thompson, S. U. Chung, K. Danyo, R. Hackenburg, C. Olchanski, D. P. Weygand, H. J. Willutzki, A. Dzierba, Jeffrey L. Gunter, R. Lindenbusch, D. R. Rust, E. Scott, P. Smith, T. Sulanke, S. Teige, S. P. Denisov, V. A. Dorofeev, I. Kachaev, V. V. Lipaev, А. В. Попов, D.I. Ryabchikov, Z. Bar‐Yam, J. Dowd, P. Eugenio, M. Hayek, W. Kern, E. King, N. Shenhav, V.A. Bodyagin, O. L. Kodolova, V. L. Korotkikh, M. Kostin, A. Ostrovidov, L. Sarycheva, N. B. Sinev, I. N. Vardanyan, A. A. Yershov, D. S. Brown, T. K. Pedlar, K. K. Seth, J. Wise, Dongxu Zhao, G. S. Adams, J. P. Cummings, J. Kühn, J. Napolitano, M. Nozar, J. A. Smith, D. B. White, M. Witkowski

Abstract

A partial-wave analysis of 9082 $\ensuremath{\eta}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}n$ events produced in the reaction ${\ensuremath{\pi}}^{\ensuremath{-}}\stackrel{\ensuremath{\rightarrow}}{p}\ensuremath{\eta}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}n$ at $18.3 \mathrm{GeV}/c$ has been carried out using data from experiment 852 at Brookhaven National Laboratory. The data are dominated by ${J}^{\mathrm{PC}}{=0}^{\ensuremath{-}+}$ partial waves consistent with observation of the $\ensuremath{\eta}(1295)$ and the $\ensuremath{\eta}(1440).$ The mass and width of the $\ensuremath{\eta}(1295)$ were determined to be $1282\ifmmode\pm\else\textpm\fi{}5 \mathrm{MeV}$ and $66\ifmmode\pm\else\textpm\fi{}13 \mathrm{MeV},$ respectively, while the $\ensuremath{\eta}(1440)$ was observed with a mass of $1404\ifmmode\pm\else\textpm\fi{}6 \mathrm{MeV}$ and a width of $80\ifmmode\pm\else\textpm\fi{}21 \mathrm{MeV}.$ Other partial waves of importance include the ${1}^{++}$ and the ${1}^{+\ensuremath{-}}$ waves. Results of the partial wave analysis are combined with results of other experiments to estimate ${f}_{1}(1285)$ branching fractions. These values are considerably different from current values determined without the aid of amplitude analyses.

Citations Over TimeTop 18% of 2000 papers

Abstract

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