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arXiv 0903.1301hep-ex
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Ds对K+K-pi+的Dalitz图分析

Dalitz Plot Analysis of Ds to K+K-pi+

The CLEO Collaboration, R. E. Mitchell

摘要:

我们用在sqrt(s)= 4.17 GeV处积累的586/pb的e+e-碰撞的CLEO-c数据集对Ds到K+K-pi+的衰变进行了Dalitz图分析。这对应于大约57万个D_s+D_s(*)-对,我们从中选择14400个候选者,其背景大约为15%。与以前的测量结果相比,我们发现只有通过包括额外的f_0(1370)π +的贡献与我们的数据很好的协议。我们测量了K*(892)K+、phi(1020)pi+、K 0 *(1430)K+、f_0(980)pi+、f_0(1710)pi+和f_0(1370)pi+贡献的幅度、相位和拟合分数,并限制了可能出现在该衰变中的其他KK和Kpi共振的可能贡献。

英文摘要:

We perform a Dalitz plot analysis of the decay Ds to K+K-pi+ with the CLEO-c data set of 586/pb of e+e- collisions accumulated at sqrt(s) = 4.17 GeV. This corresponds to about 0.57 million D_s+D_s(*)- pairs from which we select 14400 candidates with a background of roughly 15%. In contrast to previous measurements we find good agreement with our data only by including an additional f_0(1370)pi+ contribution. We measure the magnitude, phase, and fit fraction of K*(892) K+, phi(1020)pi+, K0*(1430)K+, f_0(980)pi+, f_0(1710)pi+, and f_0(1370)pi+ contributions and limit the possible contributions of other KK and Kpi resonances that could appear in this decay.

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。

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