Partial wave analysis of J / psi ---> gamma (K+- K0(S) pi-+)
Collaboration
16 pages
Published in:
- Phys.Lett.B 476 (2000) 25-32
e-Print:
- hep-ex/0002007 [hep-ex]
Report number:
- BIHEP-EP1-2000-02
Experiments:
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Abstract: (Elsevier)
BES data on J / ψ → γ ( K ± K S 0 π ∓ ) are presented. There is a strong peak due to η (1440)/ ι , which is fitted with a Breit–Wigner amplitude with s -dependent widths for decays to K ∗ K , κK , ηππ and ρρ ; κ refers to the Kπ S-wave. At a K K ̄ π mass of ∼2040 MeV, there is a second peak with width ∼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 s ̄ g hybrid partner of π (1800).- 14.40.Cs
- 12.39.Mk
- 13.25.Jx
- 13.40.Hq
- electron positron: colliding beams
- electron positron: annihilation
- J/psi(3100): electroproduction
- J/psi(3100): radiative decay
- mass spectrum: (K0(S) K pi)
- partial wave analysis
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