X.S. Li

First observations of ψ ( 2 S ) and χ c J ( 1 P ) decays to four-body final states h + h − K S 0 K S 0

M. Ablikim, J. Z. Bai, Y. Ban, J.G. Bian et autres

First observations of χc0, χc1, and χc2 decays to π+π−KS0KS0 and K+K−KS0KS0, as well as ψ(2S) decay to π+π−KS0KS0, are presented. The branching fractions of these decay channels are determined using 14×106 ψ(2S) events collected at BESII/BEPC. The branching fractions of χc0,χc2→KS0KS0 …

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Partial wave analysis of ψ′→π+π−π0 at BESII

J.Z. Bai, Y. Ban, J. G. Bian, Jin Chang et autres

The decay ψ′→π+π−π0 is analyzed using a sample of 14 million ψ′ events taken with the BESII detector at the BEPC, and the branching fraction is measured to be B(ψ′→π+π−π0)=(18.1±1.8±1.9)×10−5. A partial wave analysis is carried out using the helicity amplitude method. …

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Observation of the decay ψ(2S)→K∗(892)K¯+c.c.

J.Z. Bai, Y. Ban, J. G. Bian, Jin Chang et autres

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A study of J/ψ→γγV(ρ,φ) decays with the BESII detector

J.Z. Bai, Y. Ban, J. G. Bian, X.D. Cai et autres

Using a sample of 58×10 6 J / ψ events collected with the BESII detector, radiative decays J / ψ → γγV , where V = ρ or φ , are studied. A resonance around 1420 MeV/ c 2 ( X (1424)) …

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Search for K0SK0S in J/ψ and ψ(2S) decays

J.Z. Bai, Y. Ban, J. G. Bian, Xuanming Cai et autres

The CP violating processes J / ψ → K 0 S K 0 S and ψ (2 S )→ K 0 S K 0 S are searched for using samples of 58 million J / ψ and 14 million ψ (2 S …

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