Partial wave analysis of ψ(2S)→ppˉη

Media type: E-Article

Title: Partial wave analysis of ψ(2S)→ppˉη

Contributor: Ablikim, M. [Author]; Achasov, M. N. [Author]; Bennett, J. V. [Author]; Jing, F. F. [Author]; Kalantar-Nayestanaki, N. [Author]; Kavatsyuk, M. [Author]; Kopf, B. [Author]; Kornicer, M. [Author]; Kühn, W. [Author]; Lai, W. [Author]; Lange, J. S. [Author]; Larin, P. [Author]; Leyhe, M. [Author]; Bertani, M. [Author]; Li, C. H. [Author]; Li, Cheng [Author]; Li, Cui [Author]; Li, D. M. [Author]; Li, F. [Author]; Li, G. [Author]; Li, H. B. [Author]; Li, J. C. [Author]; Li, K. [Author]; Li, Lei [Author]; [...]

imprint: Soc., 2013

Language: English

DOI: https://doi.org/10.1103/PhysRevD.88.032010

ISSN: 1550-7998; 1550-2368; 0556-2821; 1089-4918

Keywords: psi(3685): branching ratio: measured ; N(1535) --> p eta ; psi(3685): hadronic decay ; 3.68 GeV-cms ; eta: associated production ; experimental results ; electron positron: annihilation ; angular distribution ; p: pair production ; psi(3685) --> p anti-p eta ; psi(3685) --> N(1535) anti-p ; partial wave analysis ; mass spectrum ; Beijing Stor ; N(1535): intermediate state ; BES ; eta --> 2photon

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Description: Using a sample of $1.06 \times 10^{8}$ $\psi(2S)$ events collected with the BESIII detector at BEPCII, the decay $\psi(2S) \to p \bar{p}\eta$ is studied. A partial wave analysis determines that the intermediate state N(1535) with a mass of $1524\pm5^{+10}_{-4}$ MeV/$c^2$ and a width of $130^{+27+57}_{-24-10}$ MeV/$c^2$ is dominant in the decay; the product branching fraction is determined to be $B(\psi(2S) \to N(1535)\bar{p})\times B(N(1535)\to p\eta)+c.c. = (5.2\pm0.3^{+3.2}_{-1.2})\times 10^{-5}$. Furthermore, the branching fraction of $\psi(2S) \to \eta p \bar{p}$ is measured to be $(6.4\pm0.2\pm0.6)\times 10^{-5}$.

Access State: Open Access

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