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First measurement of the fraction of top-quark pair production through gluon-gluon fusion

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.

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Publisher copy:
10.1103/PhysRevD.78.111101

Authors


Aaltonen, T More by this author
Adelman, J More by this author
Akimoto, T More by this author
Albrow, MG More by this author
Álvarez González, B More by this author
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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

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