中文

$\Omega^- \to \Lambda K^-$ 衰变 $\alpha$ 不对称参数的测量

高能物理 - 实验 2008-11-26 v1

摘要

我们利用 HyperCP 谱仪在 1997 年费米实验室固定靶运行期间采集的数据,测量了 ΩΛK\Omega^- \to \Lambda K^- 衰变的 α\alpha 参数。通过分析 0.96 百万个 ΩΛK\Omega^- \to \Lambda K^-, Λpπ\Lambda \to p \pi^- 衰变样本,我们得到 αΩαΛ=[1.33±0.33(stat)±0.52(syst)]×102\alpha_{\Omega} \cdot \alpha_{\Lambda} = [1.33 \pm 0.33(\text{stat}) \pm 0.52(\text{syst})] \times 10^{-2}。采用公认的 αΛ\alpha_{\Lambda} 值,求得 αΩ\alpha_{\Omega}[2.07±0.51(stat)±0.81(syst)]×102[2.07 \pm 0.51(\text{stat}) \pm 0.81(\text{syst})] \times 10^{-2}

关键词

引用

@article{arxiv.hep-ex/0502043,
  title  = {Measurement of the Alpha Asymmetry Parameter for the Omega- to Lambda K- Decay},
  author = {HyperCP Collaboration and Y. C. Chen and R. A. Burnstein and A. Chakravorty and A. Chan and W. S. Choong and K. Clark and E. C. Dukes and C. Durandet and J. Felix and G. Gidal and P. Gu and H. R. Gustafson and C. Ho and T. Holmstrom and M. Huang and C. James and C. M. Jenkins and D. M. Kaplan and L. M. Lederman and N. Leros and M. J. Longo and F. Lopez and L. C. Lu and W. Luebke and K. B. Luk and K. S. Nelson and H. K. Park and J. P. Perroud and D. Rajaram and H. A. Rubin and P. K. Teng and J. Volk and C. G. White and S. L. White and P. Zyla},
  journal= {arXiv preprint arXiv:hep-ex/0502043},
  year   = {2008}
}

备注

5 pages, 4 figures, to be appeared as a Rapid Communication in Phys. Rev. D