Publication
Title
Measurement of the fraction of $t\overline{t}$ production via gluon-gluon fusion in $p\overline{p}$ collisions at $\sqrt{s}$=1.96 TeV
Author
Institution/Organisation
CDF Collaboration
Abstract
 We present a measurement of the ratio of the tt̅ production cross section via gluon-gluon fusion to the total tt̅ production cross section in pp̅ 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 tt̅ decay to lepton+jets. Using an artificial neural network technique we discriminate between tt̅ events produced via qq̅ annihilation and gg fusion, and find Gf=σ(gg→tt̅ )/σ(pp̅ →tt̅ )<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.
Language
English
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Publication
Lancaster, Pa : 2009
ISSN
0556-2821
Volume/pages
79:3(2009), p. 031101,1-031101,8
ISI
000263816600001
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address