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arXiv 1208.1902hep-exnucl-ex
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$\sqrt{s} = 7$ TeV pp碰撞中美强子衰变电子的测量

Measurement of electrons from beauty hadron decays in pp collisions at $\sqrt{s} = 7$ TeV

ALICE Collaboration

摘要:

利用欧洲核子研究中心(CERN)大型强子对撞机(LHC)的ALICE实验,在中快度(|y| < 0.8)下,测量了美强子在横动量范围$1 < p_{\rm T} < 8$ Gev/ $c$内的半轻子衰变的电子产生截面,质心能量为$\sqrt{s} = 7$ TeV,积分亮度为2.2 nb $^{-1}$ .美强子衰变中的电子是根据衰变顶点相对于碰撞顶点的位移来选择的。微扰QCD计算在不确定度范围内与测量结果一致。数据外推到全相空间,以确定产生美夸克-反夸克对的总截面。

英文摘要:

The production cross section of electrons from semileptonic decays of beauty hadrons was measured at mid-rapidity (|y| < 0.8) in the transverse momentum range $1 < p_{\rm T} < 8$ Gev/$c$ with the ALICE experiment at the CERN LHC in pp collisions at a center of mass energy $\sqrt{s} = 7$ TeV using an integrated luminosity of 2.2 nb$^{-1}$. Electrons from beauty hadron decays were selected based on the displacement of the decay vertex from the collision vertex. A perturbative QCD calculation agrees with the measurement within uncertainties. The data were extrapolated to the full phase space to determine the total cross section for the production of beauty quark-antiquark pairs.

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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