中文

标量共振对 $B_s - \bar B_s$ 混合角的影响

高能物理 - 唯象学 2010-10-27 v3 高能物理 - 实验 核理论

摘要

在广义 QCD 因子化框架内,包括 \alphas\alphas 中所有领头阶修正,分析了 Bs0J/ψϕB_s^0 \to J/\psi \phiBs0J/ψf0(980)B_s^0 \to J/\psi f_0(980) 衰变。我们指出,计算出的宽度比 Γ(Bs0J/ψf0(980),f0(980)π+π)/Γ(Bs0J/ψϕ,ϕK+K)\Gamma (B_s^0\to J/\psi f_0(980), f_0(980)\to \pi^+\pi^-)/ \Gamma(B_s^0 \to J/\psi \phi,\phi\to K^+K^-) 强烈表明,在从 Bs0ϕJ/ψB_s^0 \to \phi J/\psi 衰变振幅中提取 BsBˉsB_s-\bar{B}_s 混合角 2βs-2\beta_s 时,f0(980)f_0(980) 子代 π\pi 介子或 KK 介子中的 SS 波效应不可忽略。

关键词

引用

@article{arxiv.1003.5980,
  title  = {Scalar resonance effects on the B_s - \bar B_s mixing angle},
  author = {O. Leitner and J. -P. Dedonder and B. Loiseau and B. El-Bennich},
  journal= {arXiv preprint arXiv:1003.5980},
  year   = {2010}
}

备注

16 pages and 3 figures; revised version due to erroneous discussion of annihilation contribution which led to their over-estimation. Main conclusions are not altered, yet Fig. 2-3 changed; one additional table (Table IX) compares theoretical values to data for branching fractions, asymmetries as well as polarizations. New paragraph about f_0(980) decay constant on page 14. Accepted in PRD