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arXiv 0910.3013hep-ex
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CDF的B_c性能测定

Measurement of B_c properties at CDF

T. S. Nigmanov, K. R. Gibson, M. P. Hartz, P. F. Shepard

摘要:

Bc介子是由两个不同味的重夸克组成的。它的寿命和生产性能的测量已经取得了半轻子Bc J/psi+1 +X衰变的基础上收集的数据与CDF II探测器对应的积分亮度为1 fb-1。测得Bc平均寿命ctau为142.5 ± 15.8-14.8(stat)5.5(syst)μ m。测量了两个pT(B)阈值下Bc与J/psi+mu+nu的产生截面乘以分支比与B+与J/psi+K的比值:当pT(B)大于4GeV/c时,为0.295+/-0.040(stat)+0.033-0.026(sys t.)0.036(pT谱)和pT(B)大于6 GeV/c为0.227+/-0.033(stat)+0.024-0.017(syst.)+/- 0.014(pT光谱)。

英文摘要:

The Bc meson is composed of two heavy quarks of distinct flavor. Measurements of its lifetime and production properties have been made based on semileptonic Bc to J/psi+l+X decays using data collected with the CDF II detector corresponding to an integrated luminosity of 1 fb-1. The Bc average lifetime ctau is measured to be 142.5+15.8-14.8(stat) 5.5(syst) mum. The measurements of the ratio of the production cross section times branching ratio of Bc to J/psi+mu+nu relative to B+ to J/psi+K were done for two pT(B) thresholds: for pT(B) greater 4 GeV/c as 0.295+/-0.040(stat)+0.033-0.026(syst.)0.036(pT spectrum) and for pT(B) greater 6 GeV/c as 0.227+/-0.033(stat)+0.024-0.017(syst.)+/-0.014(pT spectrum).

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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