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arXiv 0903.2403hep-ex
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在sqrt s = 1.96 TeV的ppbar碰撞中用μ ^- D^0 X末态衰变测量b-强子产生截面

Measurement of the b-Hadron Production Cross Section Using Decays to mu^- D^0 X Final States in ppbar Collisions at sqrt s = 1.96 TeV

CDF Collaboration

摘要:

本文报道了在sqrt{s}= 1.96TeV的p-pbar碰撞中b强子产生截面的测量结果。我们利用费米实验室Tevatron升级后的对撞机探测器(CDF II)收集的积分亮度为83 pb^-1的数据样本,分析了在半轻子衰变模式H_b -> mu^- D^0 X中部分重构的b强子H_b。我们对横动量p_T > 9 GeV/c,快度|y| <0.6的b强子的包容产生截面的测量结果为σ = 1.30 mub +/- 0.05 mub(stat)+/- 0.14 mub(syst)+/- 0.07 mub(B),其中的不确定性分别是统计的、系统的和来自分支分数的。微分截面dsigma/dp_T与最近的H_b截面测量值符合得很好,并且可以用固定阶次领先对数预测来描述.

英文摘要:

We report a measurement of the production cross section for b hadrons in p-pbar collisions at sqrt{s}=1.96 TeV. Using a data sample derived from an integrated luminosity of 83 pb^-1 collected with the upgraded Collider Detector (CDF II) at the Fermilab Tevatron, we analyze b hadrons, H_b, partially reconstructed in the semileptonic decay mode H_b -> mu^- D^0 X. Our measurement of the inclusive production cross section for b hadrons with transverse momentum p_T > 9 GeV/c and rapidity |y|<0.6 is sigma = 1.30 mub +/- 0.05 mub(stat) +/- 0.14 mub (syst) +/- 0.07 mub (B), where the uncertainties are statistical, systematic, and from branching fractions respectively. The differential cross sections dsigma/dp_T are found to be in good agreement with recent measurements of the H_b cross section and well described by fixed-order next-to-leading logarithm predictions.

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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