标题： Belle 的首批物理结果 显示英文标题

标题： First Physics Results From Belle

摘要： Belle探测器在KEK-B非对称$e^{+}e^{-}$对撞机上，截至2000年7月已在$\Upsilon(4S)$共振处记录了6.2 fb$^{-1}$数据。利用此数据样本，提出了关于各种B介子分支比测量的若干新结果。我们还报告了标准模型CP破坏参数$\sin(2\phi_{1})$的测量，其中$\phi_{1}$是CKM三角形的一个角度。初步结果为$\sin(2\phi_{1})$ = $0.45^{+0.43 \pm 0.07}_{-0.44 \pm 0.08}$。 显示英文摘要

摘要： The Belle detector at the KEK-B asymmetric $e^{+}e^{-}$ collider has recorded 6.2 fb$^{-1}$ data at the $\Upsilon(4S)$ resonance by July 2000. Using this data sample, several new results on various B meson branching ratio measurements are presented. We also report on the measurement of the Standard Model CP violation parameter $\sin(2\phi_{1})$, where $\phi_{1}$ is one of angles of the CKM triangle. The preliminary result is $\sin(2\phi_{1})$ = $0.45^{+0.43 \pm 0.07}_{-0.44 \pm 0.08}$.