Observation of eta' decays to pi+pi-pi0 and pi+pi-e+e-

P Naik; J Rademacker; D M Asner; K W Edwards; J Reed; A N Robichaud; G Tatishvili; R A Briere; H Vogel; P U E Onyisi; J L Rosner; J P Alexander; D G Cassel; J E Duboscq; R Ehrlich; L Fields; R S Galik; L Gibbons; R Gray; S W Gray; D L Hartill; B K Heltsley; D Hertz; J M Hunt; J Kandaswamy; D L Kreinick; V E Kuznetsov; J Ledoux; H Mahlke-Krüger; D Mohapatra; J R Patterson; D Peterson; D Riley; A Ryd; A J Sadoff; X Shi; S Stroiney; W M Sun; T Wilksen; S B Athar; J Yelton; P Rubin; S Mehrabyan; N Lowrey; M Selen; E J White; J Wiss; R E Mitchell; M R Shepherd; D Besson; T K Pedlar; D Cronin-Hennessy; K Y Gao; J Hietala; Y Kubota; T Klein; R Poling; A W Scott; P Zweber; S Dobbs; Z Metreveli; K K Seth; B J Y Tan; A Tomaradze; J Libby; L Martin; A Powell; G Wilkinson; H Mendez; J Y Ge; D H Miller; V Pavlunin; B Sanghi; I P J Shipsey; B Xin; G S Adams; D Hu; B Moziak; J Napolitano; Q He; J Insler; H Muramatsu; C S Park; E H Thorndike; F Yang; M Artuso; S Blusk; S Khalil; J Li; R Mountain; K Randrianarivony; N Sultana; T Skwarnicki; S Stone; J C Wang; L M Zhang; G Bonvicini; D Cinabro; M Dubrovin; A Lincoln; K M Ecklund; CLEO Collaboration

doi:10.1103/PhysRevLett.102.061801

Observation of eta' decays to pi+pi-pi0 and pi+pi-e+e-

Phys Rev Lett. 2009 Feb 13;102(6):061801. doi: 10.1103/PhysRevLett.102.061801. Epub 2009 Feb 11.

Authors

P Naik¹, J Rademacker, D M Asner, K W Edwards, J Reed, A N Robichaud, G Tatishvili, R A Briere, H Vogel, P U E Onyisi, J L Rosner, J P Alexander, D G Cassel, J E Duboscq, R Ehrlich, L Fields, R S Galik, L Gibbons, R Gray, S W Gray, D L Hartill, B K Heltsley, D Hertz, J M Hunt, J Kandaswamy, D L Kreinick, V E Kuznetsov, J Ledoux, H Mahlke-Krüger, D Mohapatra, J R Patterson, D Peterson, D Riley, A Ryd, A J Sadoff, X Shi, S Stroiney, W M Sun, T Wilksen, S B Athar, J Yelton, P Rubin, S Mehrabyan, N Lowrey, M Selen, E J White, J Wiss, R E Mitchell, M R Shepherd, D Besson, T K Pedlar, D Cronin-Hennessy, K Y Gao, J Hietala, Y Kubota, T Klein, R Poling, A W Scott, P Zweber, S Dobbs, Z Metreveli, K K Seth, B J Y Tan, A Tomaradze, J Libby, L Martin, A Powell, G Wilkinson, H Mendez, J Y Ge, D H Miller, V Pavlunin, B Sanghi, I P J Shipsey, B Xin, G S Adams, D Hu, B Moziak, J Napolitano, Q He, J Insler, H Muramatsu, C S Park, E H Thorndike, F Yang, M Artuso, S Blusk, S Khalil, J Li, R Mountain, K Randrianarivony, N Sultana, T Skwarnicki, S Stone, J C Wang, L M Zhang, G Bonvicini, D Cinabro, M Dubrovin, A Lincoln, K M Ecklund; CLEO Collaboration

Affiliation

¹ University of Bristol, Bristol BS8 1TL, United Kingdom.

PMID: 19257578
DOI: 10.1103/PhysRevLett.102.061801

Abstract

Using psi(2S)-->pi;{+}pi;{-}J/psi, J/psi-->gammaeta;{'} events acquired with the CLEO-c detector at the CESR e;{+}e;{-} collider, we make the first observations of the decays eta;{'}-->pi;{+}pi;{-}pi;{0} and eta;{'}-->pi;{+}pi;{-}e;{+}e;{-}, measuring absolute branching fractions (37_{-9};{+11}+/-4)x10;{-4} and (25_{-9};{+12}+/-5)x10;{-4}, respectively. For eta;{'}-->pi;{+}pi;{-}pi;{0}, this result probes the mechanism of isospin violation and the roles of pi;{0}/eta/eta;{'}-mixing and final state rescattering in strong decays. We also set upper limits on branching fractions for eta;{'} decays to pi;{+}pi;{-}micro;{+}micro;{-}, 2(pi;{+}pi;{-}), pi;{+}pi;{-}2pi;{0}, 2(pi;{+}pi;{-})pi;{0}, 3(pi;{+}pi;{-}), and invisible final states.