(2009) Measurement of the fraction of tt¯ production via gluon-gluon fusion in pp¯ collisions at s=1.96 TeV. Physical Review D, Vol. 79 (No. 3). doi:10.1103/PhysRevD.79.031101 ISSN 1550-7998.
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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.
| Item Type: | Journal Article |
|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics |
| Journal or Publication Title: | Physical Review D |
| Publisher: | American Physical Society |
| ISSN: | 1550-7998 |
| Official Date: | 2009 |
| Dates: | Date Event 2009 Published |
| Volume: | Vol. 79 |
| Number: | No. 3 |
| DOI: | 10.1103/PhysRevD.79.031101 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | https://wrap.warwick.ac.uk/49460/ |
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