According to SM in ppbar collisions of center-of-momentum of about 2 TeV, ttbars are expected to be produced through gluon gluon fusion (~15%) and quark-antiquark annihilation (~85%). In this study, we make a measurement of the ttbar cross section fraction through gg fusion over qqbar annihilation. As in many analyses, this is a test of the SM prediction.
In addition, there have been some suggestions that even though the ttbar production cross section measured in Run I is in agreement with the SM prediction, there is the possibility of having ttbar production and top quark decay mechanisms beyond SM that would cancel each others effect such that the result would still be consistent with what has been observed in Run I. Thus there is interest in studying the ttbar production mechanisms independent of the ttbar final state channels.
CDF8897 presents the changes to the analysis and the updated results.
CDF8672 presents the first measurement of sigma(gg->ttbar)/sigma(ppbar->ttbar) using 1 fb-1.
CDF8271 presents the first measurement of sigma(gg->ttbar)/sigma(ppbar->ttbar) using 360 pb-1.
CDF8031 shows the correlation between the average low pt track multiplicity and average number of gluons in a given sample.
CDF6218 is a generator-level study to develop a technique to get the ttbar production through gg fusion rate.
CDF7322 is a look at the energy flow in W+n jets events, comparing data with PYTHIA Tune-A MC.
CDF6698 is a look at the energy flow in ttbar events, comparing ttbar MC with W+3 or more jet events.
Re-blessing: Study of ttbar Production Mechanisms, presented in Top Group meeting on July 19, 2007
Blessing: Study of ttbar Production Mechanisms, presented in Top Group meeting on January 31, 2007
Prebless: Study of ttbar Production Mechanism, presented in Top Group meeting on January 18, 2007
Full status report: Study of ttbar Production Mechanism, presented in Top Properties meeting on December 22, 2006
Update: Study of ttbar Production Mechanism, presented in Top Properties meeting on December 01, 2006
Update: Study of ttbar Production Mechanism, presented in Top Properties meeting on November 10, 2006
Update: Study of ttbar Production Mechanism, presented in Top Properties meeting on November 03, 2006