Based on (2712.4 +/- 14.1) x 10^6 psi(3686) events collected with the BESIII detector, we study the decays hc -> 3(pi+pi-)pi0, hc -> 2(pi+pi-)omega, hc -> 2(pi+pi-)pi0eta, hc -> 2(pi+pi-)eta, and hc -> p pbar via psi(3686) -> pi0hc. The decay channel hc -> 3(pi+pi-)pi0 is observed for the first time, and its branching fraction is determined to be (9.28 +/- 1.14 +/- 0.77) x 10^-3, where the first uncertainty is statistical and the second is systematic. In addition, first evidence is found for the modes hc -> 2(pi+pi-)pi0eta and hc -> 2(pi+pi-)omega with significances of 4.8 sigma and 4.7 sigma, and their branching fractions are determined to be (7.55 +/- 1.51 +/- 0.77) x 10^-3 and (4.00 +/- 0.86 +/- 0.35) x 10^-3, respectively. No significant signals of hc -> 2(pi+pi-)eta and hc -> p pbar are observed, and the upper limits of the branching fractions of these decays are determined to be <6.19 x 10^-4 and <4.40 x 10^-5 at the 90% confidence level, respectively.
Study of hc→3(π+π-)π0, hc→2(π+π-)ω, hc→2(π+π-)π0η, hc→2(π+π-)η, and hc→p pbar
Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2024-01-01
Abstract
Based on (2712.4 +/- 14.1) x 10^6 psi(3686) events collected with the BESIII detector, we study the decays hc -> 3(pi+pi-)pi0, hc -> 2(pi+pi-)omega, hc -> 2(pi+pi-)pi0eta, hc -> 2(pi+pi-)eta, and hc -> p pbar via psi(3686) -> pi0hc. The decay channel hc -> 3(pi+pi-)pi0 is observed for the first time, and its branching fraction is determined to be (9.28 +/- 1.14 +/- 0.77) x 10^-3, where the first uncertainty is statistical and the second is systematic. In addition, first evidence is found for the modes hc -> 2(pi+pi-)pi0eta and hc -> 2(pi+pi-)omega with significances of 4.8 sigma and 4.7 sigma, and their branching fractions are determined to be (7.55 +/- 1.51 +/- 0.77) x 10^-3 and (4.00 +/- 0.86 +/- 0.35) x 10^-3, respectively. No significant signals of hc -> 2(pi+pi-)eta and hc -> p pbar are observed, and the upper limits of the branching fractions of these decays are determined to be <6.19 x 10^-4 and <4.40 x 10^-5 at the 90% confidence level, respectively.File | Dimensione | Formato | |
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