Partial Wave Analysis of $J/ψ\to γ(K^{\pm}K_S^0π^{\mp})$

Details Partial Wave Analysis of $J/ψ\to γ(K^{\pm}K_S^0π^{\mp})$ Partial Wave Analysis of $J/ψ\to γ(K^{\pm}K_S^0π^{\mp})$

2000-02-03

arxiv.org/abs/hep-ex/0002007v1

Phys.Lett.B476:25-32,2000

Physics

High Energy Physics

High Energy Physics - Experiment

16 pages, 5 figures and 2 table

Scientific paper

10.1016/S0370-2693(00)00115-5

BES data on $J/\psi \to \gamma (K^{\pm} K_S^0 \pi^{\mp})$ are presented. There is a strong peak due to $\eta(1440)/\iota$, which is fitted with a Breit-Wigner amplitude with $s$-dependent widths for decays to $K^*K$, $\kappa K$, $\eta \pi\pi$ and $\rho\rho$; $\kappa$ refers to the $K\pi$ S-wave. At a $K\bar{K}\pi$ mass of $\sim 2040$ MeV, there is a second peak with width $\sim 400$ MeV; $J^P = 0^-$ is preferred over $1^+$ and $2^-$ respectively by 5.2 and 6.8 standard deviations. It is a possible candidate for a $0^-$ $s\bar sg$ hybrid partner of $\pi(1800)$.

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