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arXiv 0808.0971hep-ex
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D_s+ -> pi+ pi- pi+的Dalitz图分析

Dalitz Plot Analysis of D_s+ -> pi+ pi- pi+

The BABAR Collaboration, B. Aubert

摘要:

对大约13,000个Ds+衰变到π + π-π +的Dalitz图进行了分析。分析使用的384 fb-1的数据样本记录的BaBar探测器在PEP-II的非对称能量的电子+电子存储环运行在质心能量接近10.6 GeV。测量有助于该最终状态的中间共振的振幅和相位。BR(Ds+ -> pi+pi-pi+)/BR(Ds+ -> K+ K-pi+)=0.199 +/-0.004 +/-0.009。使用模型无关的分波分析,S波的振幅和相位已被测量。

英文摘要:

A Dalitz plot analysis of approximately 13,000 Ds+ decays to pi+pi-pi+ has been performed. The analysis uses a 384 fb-1 data sample recorded by the BaBar detector at the PEP-II asymmetric-energy e+e- storage ring running at center of mass energies near 10.6 GeV. Amplitudes and phases of the intermediate resonances which contribute to this final state are measured. A high precision measurement of the ratio of branching fractions is performed: BR(Ds+ -> pi+pi-pi+)/BR(Ds+ -> K+ K- pi+)=0.199 +/- 0.004 +/- 0.009. Using a model-independent partial wave analysis, the amplitude and phase of the S-wave have been measured.

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