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Title of Journal: J High Energ Phys

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Abbravation: Journal of High Energy Physics

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Springer-Verlag

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10.1016/0041-0101(78)90003-x

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1029-8479

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Annihilation rate of 2Superscript−+/Superscript

Authors: Tianhong Wang GuoLi Wang WanLi Ju Yue Jiang
Publish Date: 2013/03/19
Volume: 2013, Issue: 3, Pages: 110-
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Abstract

The 11 D 2 left coverlinec right state is the ground state of spinsinglet Dwave charmonia Although it has not been found yet the experimental data accumulate rapidly This charmonium attracts more and more attention especially when the BaBar Collaboration finds that the X3872 particle has negative parity In this paper we calculate the doublegamma and doublegluon annihilation processes of 1 D 2 charmonia and bottomonia by using the instantaneous BetheSalpeter method We find the relativistic corrections make the decay widths of 11 D 2 left coverlinec right 2~5 times smaller than the nonrelativistic results If this state is below the D 0 D 0∗ threshold we can use the sum of annihilation widths and EM transition widths to estimate the total decay width Our result for 11 D 2 left coverlinec right with m = 3820 GeV is Γ = 432 keV The dominant decay channel 11 D 2 left coverlinec right → h c γ whose branching ratio is about 90 can be used to discover this state

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