Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, Helsinki, Finland.
Phys Rev Lett. 2011 Dec 30;107(27):272001. doi: 10.1103/PhysRevLett.107.272001. Epub 2011 Dec 29.
We present a measurement of the B(s)(0) lifetime in fully and partially reconstructed B(s)(0)→D(s)(-)(ϕπ(-))X decays in 1.3 fb(-1) collected in pp ¯ collisions at √s=1.96 TeV by the CDF II detector at the Fermilab Tevatron. We measure τ(B(s)(0))=1.518±0.041(stat)±0.027(syst) ps. The ratio of this result and the world average B(0) lifetime yields τ(B(s)(0))/τ(B(0))=0.99±0.03, which is in agreement with recent theoretical predictions.
我们展示了在 1.3 fb(-1)的 pp ¯ 碰撞数据中，使用 CDF II 探测器在费米实验室 Tevatron 的 √s=1.96 TeV 上，对完全和部分重建的 B(s)(0)→D(s)(-)(ϕπ(-))X 衰变中的 B(s)(0)寿命进行的测量。我们测量到 τ(B(s)(0))=1.518±0.041(stat)±0.027(syst) ps。这一结果与世界平均 B(0)寿命的比值为 τ(B(s)(0))/τ(B(0))=0.99±0.03，与最近的理论预测相符。
