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1. chinaXiv:201703.00608 [pdf]

Determining the upper limit of Γee for the Y(4260)

X. H. Mo; G. Li; C. Z. Yuan; K. L. He; H. M. Hu; Hu J. H.; P. Wang; Z. Y. Wang
Subjects: Physics >> Condensed Matter: Structural, Mechanical and Thermal Properties

By fitting the R values between 3.7 and 5.0 GeV measured by the BES Collaboration, the upper limit of the electron width of the newly discovered resonance Y(4260) is determined to be 240 eV at 90% C.L. Together with the BaBar measurement on Γee? B(Y(4260) → π+π- J/ψ), this implies a large decay width of Y (4260) → π+π- J/ψ final states.

submitted time 2017-03-26 Hits12930Downloads1088 Comment 0

2. chinaXiv:201703.00603 [pdf]

The Y(4260) as an ω χc1 molecular state

C. Z. Yuan; P. Wang; X. H. Mo
Subjects: Physics >> Condensed Matter: Structural, Mechanical and Thermal Properties

It is suggested that the newly observed Y(4260) by BaBar Collaboration is a molecular state composed of an ω and a χc1. Both the production and decay properties are discussed. A consequence for this molecular state, Y(4260), is that it decays copiously into π+π-π0χcl. It is also expected that Y(4260) →π0π0J/ψ is produced at half rate as Y(4260) →π0π0J/ψ. These decay modes should be searched for in the B factories using initial state radiative return data and B decay data as well.

submitted time 2017-03-26 Hits1629Downloads860 Comment 0

3. chinaXiv:201703.00601 [pdf]

Baryon Ntibaryon Nonets

C.Z. Yuan; X. H. Mo; P. Wang
Subjects: Physics >> Condensed Matter: Structural, Mechanical and Thermal Properties

The baryon–antibaryon SU(3) nonets are proposed as a scheme to classify the increased number of experimentally observed enhancements near the baryon antibaryon mass threshold. The scheme is similar to the Fermi–Yang–Sakata model, which was put forth about fifty years ago in explaining the mesons observed at that time. According to the present scheme, many new baryon–antibaryon bound states are predicted, and their possible productions in quarkonium decays and B decays are suggested for experimental search.

submitted time 2017-03-26 Hits1370Downloads779 Comment 0

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