Measurement of σ(p(p)over-bar → Z plus X)Br(Z → τ+τ-) at √s=1.96 TeV
Measurement of σ(p(p)over-bar → Z plus X)Br(Z → τ+τ-) at √s=1.96 TeV
复制标题
在√s=1.96 TeV测量σ(p(p)超棒→Z加X)Br(Z→τ+τ-)
DOI：
10.1016/j.physletb.2008.11.010
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发表时间：
2009-01-05
影响因子：
4.4
通讯作者：
Zverev, E. G.
中科院分区：
文献类型：
--
作者：
Abazov, V. M.;Abbott, B.;Zverev, E. G.
我们给出了在根s = 1.96TeV的p（p）棒碰撞中Z玻色子产生乘以τ轻子对的分支分数sigma（p（p）over bar -> Z + X）Br（Z -> tau（+）tau（-））的截面的测量结果。测量是在一个τ轻子衰变为μ子和中微子的通道中进行的。而另一个τ轻子则以强子方式衰变，或者衰变为电子和中微子。数据样本对应于费米实验室Tevatron对撞机DO探测器收集的1.0 fb（-1）的积分光度。样本包含1511个候选事件，估计有20%的背景来自被误认为τ轻子的喷流或μ子。得到sigma。Br = 240 +/- 8（星星）+/- 12（sys）+/- 15（lum）pb，与标准模型预测一致。(C)2008 Elsevier B. V.保留所有权利。
We present a measurement of the cross section for Z boson production times the branching fraction to tau lepton pairs sigma(p (p) over bar -> Z + X)Br(Z -> tau(+)tau(-)) in p (p) over bar collisions at root s = 1.96 TeV. The measurement is performed in the channel in which one tau lepton decays into a muon and neutrinos. and the other tau lepton decays hadronically or into an electron and neutrinos. The data sample corresponds to an integrated luminosity of 1.0 fb(-1) collected with the DO detector at the Fermilab Tevatron Collider. The sample contains 1511 candidate events with an estimated 20% background from jets or muons misidentified as tau leptons. We obtain sigma . Br = 240 +/- 8 (star) +/- 12 (sys) +/- 15 (lum) pb, which is consistent with the standard model prediction. (C) 2008 Elsevier B.V. All rights reserved.