- Abstract:
- We present the first measurement of σ(gg→tt̄)/ σ(pp̄→tt̄). We use 0.96fb-1 of s=1.96TeV pp̄ collision data recorded with the CDF II detector at Fermilab. Using charged particles with low transverse momentum in tt̄ events, we find σ(gg→ tt̄)/σ(pp̄→tt̄)=0.07±0.14(stat)±0. 07(syst), corresponding to a 95% confidence level upper limit of 0.33, in agreement with the standard model next-to-leading-order prediction of 0.15±0.05. © 2008 The American Physical Society.
- Publisher copy:
- 10.1103/PhysRevD.78.111101
-
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- Journal:
- Physical Review D - Particles, Fields, Gravitation and Cosmology
- Volume:
- 78
- Issue:
- 11
- Publication date:
- 2008-12-01
- DOI:
- EISSN:
-
1550-2368
- ISSN:
-
1550-7998
- URN:
-
uuid:a876ff48-223a-448a-82a1-26e434a40c0d
- Source identifiers:
-
117364
- Local pid:
- pubs:117364
- Language:
- English
- Copyright date:
- 2008
Journal article
First measurement of the fraction of top-quark pair production through gluon-gluon fusion
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