Amplitude analyses of the decays χc1→ηπ⁺π⁻ and χc1→η'π⁺π⁻

Adams, G. S.; Napolitano, J.; Ecklund, K. M.; Insler, J.; Muramatsu, H.; Park, C. S.; Pearson, L. J.; Thorndike, E. H.; Ricciardi, S.; Thomas, C.; Artuso, M.; Blusk, S.; Mountain, R.; Skwarnicki, T.; Stone, S.; Zhang, L. M.; Bonvicini, G.; Cinabro, D.; Lincoln, A.; Smith, M. J.; Zhou, P.; Zhu, J.; Naik, P.; Rademacker, J.; Asner, D. M.; Edwards, K. W.; Randrianarivony, K.; Tatishvili, G.; Briere, R. A.; Vogel, H.; Onyisi, P. U. E.; Rosner, J. L.; Alexander, J. P.; Cassel, D. G.; Das, S.; Ehrlich, R.; Gibbons, L.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Kreinick, D. L.; Kuznetsov, V. E.; Patterson, J. R.; Peterson, D.; Riley, D.; Ryd, A.; Sadoff, A. J.; Shi, X.; Sun, W. M.; Yelton, J.; Rubin, P.; Lowrey, N.; Mehrabyan, S.; Selen, M.; Wiss, J.; Libby, J.; Kornicer, M.; Mitchell, R. E.; Shepherd, M. R.; Szczepaniak, A.; Besson, D.; Pedlar, T. K.; Cronin-Hennessy, D.; Hietala, J.; Dobbs, S.; Metreveli, Z.; Seth, K. K.; Tomaradze, A.; Xiao, T.; Martin, L.; Powell, A.; Wilkinson, G.; Ge, J. Y.; Miller, D. H.; Shipsey, I. P. J.; Xin, B.

doi:10.1103/PhysRevD.84.112009

Title: Amplitude analyses of the decays χ_c1→ηπ⁺π⁻ and χ_c1→η'π⁺π⁻

Journal Article · Thu Dec 29 00:00:00 EST 2011 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.84.112009· OSTI ID:1098510

Adams, G. S.; Napolitano, J.; Ecklund, K. M.; Insler, J.; Muramatsu, H.; Park, C. S.; Pearson, L. J.; Thorndike, E. H.; Ricciardi, S.; Thomas, C.; Artuso, M.; Blusk, S.; Mountain, R.; Skwarnicki, T.; Stone, S.; Zhang, L. M.; Bonvicini, G.; Cinabro, D.; Lincoln, A.; Smith, M. J. more »

Using a data sample of 2.59×10⁷ ψ(2S) decays obtained with the CLEO-c detector, we perform amplitude analyses of the complementary decay chains ψ(2S)→γχ_c1; χ_c1→ηπ⁺π⁻ and ψ(2S)→γχ_c1; χ_c1→η'π⁺π⁻. We find evidence for an exotic P-wave η'π amplitude, which, if interpreted as a resonance, would have parameters consistent with the π₁(1600) state reported in other production mechanisms. We also make the first observation of the decay a₀(980)→η'π and measure the ratio of branching fractions B(a₀(980)→η'π)/B(a₀(980)→ηπ)=0.064±0.014±0.014. The ππ spectrum produced with a recoiling η is compared to that with η' recoil.

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Sponsoring Organization:: USDOE

OSTI ID:: 1098510

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Vol. 84 Journal Issue: 11; ISSN 1550-7998

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 29 works

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Title: Amplitude analyses of the decays χ_c1→ηπ⁺π⁻ and χ_c1→η'π⁺π⁻