A New Measurement of ηb(1S) From Γ(3S) Radiative Decay at CLEO

被引：0
|
作者：
Dobbs, Sean [1 ]
机构：
[1] Northwestern Univ, Evanston, IL 60208 USA
来源：
HADRON 2009 | 2010年 / 1257卷
关键词：
Bottomonium Spectroscopy; Upsilons; Quarkonia; COLLISIONS; SEARCH; JETS;
D O I：
10.1063/1.3483457
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Using CLEO data, we report on the confirmation of the eta(b)(S-1(0)) ground state of bottomonium in the radiative decay Gamma(3S) -> y eta(b). We determine its mass to be M(eta(b)) = 9391.8 +/- 6.6 +/- 2.1 MeV, which corresponds to the hyperfine splitting Delta M-hf(1S) = 68.5 +/- 6.6 +/- 2.0 MeV, and the branching fraction B(Gamma(3S) -> gamma eta(b)) = (7.1 +/- 1.8 +/- 1.1) x 10(-4). These results agree with those previously reported by BaBar.
引用
收藏
页码：408 / 412
页数：5
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