arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0808.4142hep-ex
收藏

双奇异b重子Ω_b的观测-

Observation of the doubly strange b baryon Omega_b-

D0 Collaboration, V. Abazov

摘要:

我们报道了在$\sqrt{s}=1.96$ TeV的$p\bar{p}$碰撞中,在衰变通道Omega_b-到J/psi Omega-,J/psi到mu+ mu-,Omega-到Lambda K-中观测到的双奇异b重子Omega_b-.使用费米实验室Tevatron对撞机D 0探测器收集的大约1.3 fb $^{-1}$数据,我们观察到17.8 +/- 4.9(stat)+/- 0.8(syst)Omega_b-信号事件,质量为6.165 +/- 0.010(stat)+/- 0.013(syst)。GeV。观测到的信号的显著性为5.4 sigma,对应于背景波动产生的概率为6.7 x 10^{-8}。

英文摘要:

We report the observation of the doubly strange b baryon Omega_b- in the decay channel Omega_b- to J/psi Omega-, with J/psi to mu+ mu- and Omega- to Lambda K-, in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. Using approximately 1.3 fb$^{-1}$ of data collected with the D0 detector at the Fermilab Tevatron Collider, we observe 17.8 +/- 4.9 (stat) +/- 0.8 (syst) Omega_b- signal events at a mass of 6.165 +/- 0.010 (stat) +/- 0.013(syst.) GeV. The significance of the observed signal is 5.4 sigma, corresponding to a probability of 6.7 x 10^{-8} of it arising from a background fluctuation.

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。

↑