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Free accessOther version: http://journals.aps.org/prd/abstract/10.1103/PhysRevD.79.031101
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Titles listMeasurement of the fraction of tt production via gluon-gluon fusion in pp collisions at...
Titles listMeasurement of the fraction of tt production via gluon-gluon fusion in pp collisions at...
Scientific Article
unige:38618 
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Measurement of the fraction of tt production via gluon-gluon fusion in pp collisions at s√=1.96 TeV |
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| Collaboration | With : Clark, Allan Geoffrey / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin | |
| Published in | Physical Review. D. 2009, vol. 79, no. 03, p. 031101 | |
| Abstract | We present a measurement of the ratio of the tt production cross section via gluon-gluon fusion to the total tt production cross section in pp collisions at s√=1.96 TeV at the Tevatron. Using a data sample with an integrated luminosity of 955 pb−1 recorded by the CDF II detector at Fermilab, we select events based on the tt decay to lepton+jets. Using an artificial neural network technique we discriminate between tt events produced via qq annihilation and gg fusion, and find Gf=σ(gg→tt)/σ(pp→tt)<0.33 at the 68% confidence level. This result is combined with a previous measurement to obtain the most stringent measurement of this quantity by CDF to date, Gf=0.07+0.15−0.07. | |
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Article (Published version) (200 Kb) - Free access Other version: http://journals.aps.org/prd/abstract/10.1103/PhysRevD.79.031101 |
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| Citation (ISO format) | CDF COLLABORATION. Measurement of the fraction of tt production via gluon-gluon fusion in pp collisions at s√=1.96 TeV. In: Physical Review. D, 2009, vol. 79, n° 03, p. 031101. https://archive-ouverte.unige.ch/unige:38618 |
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