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First measurement of the fraction of top-quark pair production through gluon-gluon fusion

CollaborationWith : Clark, Allan Geoffrey / Hamilton, Andrew / Lefevre, Régis / Sfyrla, Anna / Shreyber, Irina / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review. D. 2008, vol. 78, no. 11, p. 111101
Abstract We present the first measurement of σ(gg→tt)/σ(pp→tt). We use 0.96  fb−1 of s√=1.96  TeV pp collision data recorded with the CDF II detector at Fermilab. Using charged particles with low transverse momentum in tt events, we find σ(gg→tt)/σ(pp→tt)=0.07±0.14(stat)±0.07(syst), corresponding to a 95% confidence level upper limit of 0.33, in agreement with the standard model next-to-leading-order prediction of 0.15±0.05.
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CDF COLLABORATION. First measurement of the fraction of top-quark pair production through gluon-gluon fusion. In: Physical Review. D, 2008, vol. 78, n° 11, p. 111101. https://archive-ouverte.unige.ch/unige:38515

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Deposited on : 2014-07-07

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