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arXiv 0710.0656hep-ex
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用CDF II探测器测量b-重子

Measurement of b-Baryons with the CDF II detector

Joachim Heuser

摘要:

我们报道了新的底重子态的观测结果。最近的结果是通过衰变到J/J_b ^-的重子J_b ^-的观测。信号的显著性对应于7.7 sigma,测得的σ_b^-质量为5792.9 \pm 2.5(统计)。\pm 1.7(系统)MeV/c^2。此外,我们在Λ_b^0 π^{ \pm }谱中观察到四个共振,与底部重子\pm }一致。所有的观察结果都与理论预期一致。

英文摘要:

We report the observation of new bottom baryon states. The most recent result is the observation of the baryon Ξ_b^- through the decay Ξ_b^- to J/ψΞ^-. The significance of the signal corresponds to 7.7 sigma and the Ξ_b^- mass is measured to be 5792.9 \pm 2.5(stat.) \pm 1.7(syst.) MeV/c^2. In addition we observe four resonances in the Λ_b^0 π^{\pm} spectra, consistent with the bottom baryons Σ_b^{(*)\pm}. All observations are in agreement with theoretical expectations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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