Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland.
Phys Rev Lett. 2010 Apr 2;104(13):131801. doi: 10.1103/PhysRevLett.104.131801.
The cross section for jets from b quarks produced with a W boson has been measured in pp collision data from 1.9 fb(-1) of integrated luminosity recorded by the CDF II detector at the Tevatron. The W+b-jets process poses a significant background in measurements of top quark production and prominent searches for the Higgs boson. We measure a b-jet cross section of 2.74+/-0.27(stat)+/-0.42(syst) pb in association with a single flavor of leptonic W boson decay over a limited kinematic phase space. This measured result cannot be accommodated in several available theoretical predictions.
利用 CDF II 探测器在费米实验室 Tevatron 上收集的 1.9 fb(-1)积分亮度的 pp 对撞数据，测量了由 W 玻色子产生的 b 夸克喷注的横截面积。在顶夸克产生的测量和对希格斯玻色子的重要搜索中，W+b-喷注过程是一个显著的背景。我们在有限的动理学相空间中，测量了单个轻子 W 玻色子衰变关联的单个味 b-喷注横截面积为 2.74+/-0.27(stat)+/-0.42(syst) pb。这一测量结果与几种现有理论预测不相符。
