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Measurement of the fraction of tt̄ production via gluon-gluon fusion in pp̄ collisions at s=1.96TeV

Publication ,  Journal Article
Aaltonen, T; Adelman, J; Akimoto, T; Albrow, MG; González, BÁ; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Cho, K ...
Published in: Physical Review D - Particles, Fields, Gravitation and Cosmology
2009

We present a measurement of the ratio of the tt̄ production cross section via gluon-gluon fusion to the total tt̄ production cross section in pp̄ collisions at s=1.96TeV at the Tevatron. Using a data sample with an integrated luminosity of 955pb-1 recorded by the CDF II detector at Fermilab, we select events based on the tt̄ decay to lepton+jets. Using an artificial neural network technique we discriminate between tt̄ events produced via qq̄ annihilation and gg fusion, and find Gf=σ(gg→tt̄)/ σ(pp̄→tt̄)<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. © 2009 The American Physical Society.

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Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

ISSN

1550-7998

Publication Date

2009

Volume

79

Issue

3

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

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Aaltonen, T., Adelman, J., Akimoto, T., Albrow, M. G., González, B. Á., Amerio, S., … Stelzer, B. (2009). Measurement of the fraction of tt̄ production via gluon-gluon fusion in pp̄ collisions at s=1.96TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 79(3). https://doi.org/10.1103/PhysRevD.79.031101
Aaltonen, T., J. Adelman, T. Akimoto, M. G. Albrow, B. Á. González, S. Amerio, D. Amidei, et al. “Measurement of the fraction of tt̄ production via gluon-gluon fusion in pp̄ collisions at s=1.96TeV.” Physical Review D - Particles, Fields, Gravitation and Cosmology 79, no. 3 (2009). https://doi.org/10.1103/PhysRevD.79.031101.
Aaltonen T, Adelman J, Akimoto T, Albrow MG, González BÁ, Amerio S, et al. Measurement of the fraction of tt̄ production via gluon-gluon fusion in pp̄ collisions at s=1.96TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2009;79(3).
Aaltonen, T., et al. “Measurement of the fraction of tt̄ production via gluon-gluon fusion in pp̄ collisions at s=1.96TeV.” Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 79, no. 3, 2009. Scival, doi:10.1103/PhysRevD.79.031101.
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Measurement of the fraction of tt̄ production via gluon-gluon fusion in pp̄ collisions at s=1.96TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2009;79(3).

Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

ISSN

1550-7998

Publication Date

2009

Volume

79

Issue

3

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences