中文

共振态 $\phi(1020)$ 与 $\phi(1680)$ 对三体衰变 $B^+ \to D_s^+K\bar K$ 的贡献

高能物理 - 唯象学 2020-10-01 v2

摘要

我们在微扰 QCD (Perturbative QCD) 方法中研究了共振态 ϕ(1020)\phi(1020)ϕ(1680)\phi(1680) 对三体衰变 B+Ds+KKˉB^+ \to D_s^+K\bar K 的贡献。预测 B+Ds+ϕ(1020)Ds+K+KB^+ \to D_s^+\phi(1020) \to D_s^+ K^+K^-B+Ds+ϕ(1020)Ds+K0Kˉ0B^+ \to D_s^+\phi(1020) \to D_s^+ K^0\bar{K}^0 的分支比分别为 (1.53±0.23)×107(1.53\pm0.23) \times 10^{-7}(1.020.13+0.19)×107(1.02^{+0.19}_{-0.13} )\times 10^{-7}。衰变 B+Ds+ϕ(1680)B^+ \to D_s^+\phi(1680)(其中 ϕ(1680)\phi(1680) 衰变为 K+KK^+K^-K0Kˉ0K^0\bar{K}^0)的分支比为 (6.942.02+1.83)×109(6.94^{+1.83}_{-2.02})\times 10^{-9},约为 B+Ds+ϕ(1020)Ds+K+KB^+ \to D_s^+\phi(1020) \to D_s^+ K^+K^- 结果的 5%5\%

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引用

@article{arxiv.2007.06016,
  title  = {Resonances $\phi(1020)$ and $\phi(1680)$ contributions for the three-body decays $B^+ \to D_s^+K\bar K$},
  author = {Ai-Jun Ma},
  journal= {arXiv preprint arXiv:2007.06016},
  year   = {2020}
}

备注

5 pages and 1 figure; Some modifications, matching the published version