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arXiv 0712.3789hep-ex
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轨道激发D_s** 态Br(B_(0_s)-> Ds1(2536)μ nu)的B_(0_s)半轻子分支比的测量

Measurement of the B0_s semileptonic branching ratio to an orbitally excited D_s** state, Br(B0_s -> Ds1(2536) mu nu)

D0 Collaboration, V. Abazov

摘要:

在2002年至2006年期间用D 0探测器收集的大约1.3 fb-1的数据样本中,轨道激发的粲能级D_s1(2536)已经被观测到,通过衰变模式B0_s -> D_s1(2536)μ nu X,测量质量为2535.7 +/- 0.6(stat)+/- 0.5(syst)MeV。对分支比乘积Br(b(bar)-> D_s1(2536)μ X)·Br(D_s1(2536)->D* K0_S)进行第一次测量。假设半轻子衰变中D_s1(2536)的产生完全来自B 0_s,则提取半轻子分支比Br(B 0_s-> D_s1(2536)μ nu X)。

英文摘要:

In a data sample of approximately 1.3 fb-1 collected with the D0 detector between 2002 and 2006, the orbitally excited charm state D_s1(2536) has been observed with a measured mass of 2535.7 +/- 0.6 (stat) +/- 0.5 (syst) MeV via the decay mode B0_s -> D_s1(2536) mu nu X. A first measurement is made of the branching ratio product Br(b(bar) -> D_s1(2536) mu nu X).Br(D_s1(2536)->D* K0_S). Assuming that D_s1(2536) production in semileptonic decay is entirely from B0_s, an extraction of the semileptonic branching ratio Br(B0_s -> D_s1(2536) mu nu X) is made.

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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