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Zielinski M, Zieminska D, Zieminski A, Zitoun R, Zutshi V, Zverev E G, Zylberstejn A
Joint Institute for Nuclear Research, Dubna, Russia.
Phys Rev Lett. 2005 Apr 29;94(16):161801. doi: 10.1103/PhysRevLett.94.161801. Epub 2005 Apr 27.
Using the data collected with the D0 detector at square root(s) = 1.96 TeV, for integrated luminosities of about 180 pb(-1), we have measured the ratio of inclusive cross sections for pp --> Z + b jet to pp --> Z + jet production. The inclusive Z + b-jet reaction is an important background to searches for the Higgs boson in associated ZH production at the Fermilab Tevatron collider. Our measurement is the first of its kind, and relies on the Z --> e+ e- and Z --> mu+ mu- modes. The combined measurement of the ratio yields 0.021+/-0.005 for hadronic jets with transverse momenta pT > 20 GeV/c and pseudorapidities absolute value(eta) < 2.5, consistent with next-to-leading-order predictions of the standard model.
利用在(\sqrt{s}=1.96) TeV时由D0探测器收集的数据，对于约(180) pb(^{-1})的积分亮度，我们测量了(pp→Z + b)喷注与(pp→Z +)喷注产生的包含性截面之比。包含性(Z + b)喷注反应是在费米实验室Tevatron对撞机上寻找希格斯玻色子相关(ZH)产生过程中的一个重要背景。我们的测量是首次此类测量，并且依赖于(Z→e^{+}e^{-})和(Z→\mu^{+}\mu^{-})模式。对于横向动量(p_{T}>20) GeV/c且伪快度(\vert\eta\vert<2.5)的强子喷注，该比率的组合测量结果为(0.021\pm0.005)，与标准模型的次领头阶预测一致。
