Measurements of the absolute branching fractions for D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e)

doi:10.1103/PhysRevD.94.112003

	Measurements of the absolute branching fractions for D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e)
	BESIII Collaboration
刊名	PHYSICAL REVIEW D
	2016
卷号	94 期号:11 页码:112003
ISSN号	2470-0010
DOI	10.1103/PhysRevD.94.112003
文献子类	Article
英文摘要	By analyzing 482 pb(-1) of e(+)e(-) collision data collected at root s = 4.009 GeV with the BESIII detector at the BEPCII collider, we measure the absolute branching fractions for the semileptonic decays D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e) to be B(D-s(+) -> eta e(+)nu(e)) = (2.30 +/- 0.31 +/- 0.08)% and B(D-s(+) -> eta ' e(+)nu(e)) = (0.93 +/- 0.30 +/- 0.05)%, respectively, and their ratio B(D-s(+) -> eta ' e(+)nu(e)) / B(D-s(+) -> eta ' e(+)nu(e)) = 0.40 +/- 0.14 +/- 0.02, where the first uncertainties are statistical and the second ones are systematic. The results are in good agreement with previous measurements within uncertainties; they can be used to determine the eta-eta' mixing angle and improve upon the D-s(+) semileptonic branching ratio precision.
电子版国际标准刊号	2470-0029
语种	英语
WOS记录号	WOS:000389505100001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/287046]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	BESIII Collaboration. Measurements of the absolute branching fractions for D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e)[J]. PHYSICAL REVIEW D,2016,94(11):112003.
APA	BESIII Collaboration.(2016).Measurements of the absolute branching fractions for D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e).PHYSICAL REVIEW D,94(11),112003.
MLA	BESIII Collaboration."Measurements of the absolute branching fractions for D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e)".PHYSICAL REVIEW D 94.11(2016):112003.