η-decays into three pions

C. Amsler, D. S. Armstrong, I. Augustin, C. A. Baker, B. M. Barnett, C. J. Batty, K. Beuchert, P. Birien, P. Blüm, R. Bossingham, K. Braune, J. Brose, D. V. Bugg, M. Burchell, T. Case, A. Cooper, O. Cramer, K. M. Crowe, T. Degener, H. P. DietzS. v. Dombrowski, M. Doser, W. Dünnweber, D. Engelhardt, M. Englert, M. A. Faessler, C. Felix, G. Folger, R. Glantz, R. Hackmann, R. P. Haddock, F. H. Heinsius, M. Herz, N. P. Hessey, P. Hidas, P. Illinger, D. Jamnik, H. Kalinowsky, B. Kämmle, T. Kiel, J. Kisiel, E. Klempt, M. Kobel, H. Koch, C. Kolo, K. Königsmann, M. Kunze, M. Lakata, R. Landua, J. Lüdemann, H. Matthäy, R. McCrady, M. Merkel, J. P. Merlo, C. A. Meyer, L. Montanet, A. Noble, F. Ould-Saada, K. Peters, C. N. Pinder, G. Pinter, S. Ravndal, C. Regenfus, J. Salk, E. Schäfer, B. Schmid, P. Schmidt, R. Seibert, S. Spanier, H. Stöck, C. Straßburger, U. Strohbusch, M. Suffert, U. Thoma, M. Tischhäuser, D. Urner, C. Völcker, F. Walter, D. Walther, U. Wiedner, N. Winter, J. Zoll, B. S. Zou, Č Zupančič

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Abstract

The branching ratios Γ(η → 3π0) Γ(η → π+π-π0) = 1.44 ± 0.09 ± 0.10 and Γ(η → γγ) Γ(η → π+π-π0) = 1.78 ± 0.10 ± 0.13 have been determined using the Crystal Barrel detector at LEAR. The latter ratio yields a partial width of Γ(η → π+π-π0) = 0.26 ± 0.03 keV using the known value for Γ(η → γγ). The η → π+π-π0) Dalitz plot is compared to the predictions of chiral perturbation theory.

Original languageEnglish
Pages (from-to)203-207
Number of pages5
JournalPhysics Letters B
Volume346
Issue number1-2
DOIs
Publication statusPublished - Mar 2 1995

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Amsler, C., Armstrong, D. S., Augustin, I., Baker, C. A., Barnett, B. M., Batty, C. J., Beuchert, K., Birien, P., Blüm, P., Bossingham, R., Braune, K., Brose, J., Bugg, D. V., Burchell, M., Case, T., Cooper, A., Cramer, O., Crowe, K. M., Degener, T., ... Zupančič, Č. (1995). η-decays into three pions. Physics Letters B, 346(1-2), 203-207. https://doi.org/10.1016/0370-2693(95)00094-2