Title
Measurement of the fraction of <tex>$t\overline{t}$</tex> production via gluon-gluon fusion in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV Measurement of the fraction of <tex>$t\overline{t}$</tex> production via gluon-gluon fusion in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Volume/pages
79(2009) :3 , p. 031101,1-031101,8
ISSN
0556-2821
ISI
000263816600001
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We present a measurement of the ratio of the tt&#773; production cross section via gluon-gluon fusion to the total tt&#773; production cross section in pp&#773; 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&#773; decay to lepton+jets. Using an artificial neural network technique we discriminate between tt&#773; events produced via qq&#773; annihilation and gg fusion, and find Gf=σ(gg→tt&#773; )/σ(pp&#773; →tt&#773; )<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=0.07-0.07+0.15.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/6f11fb/62555c86.pdf
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