Bound-state effects on top quark production at hadron colliders

Kaoru Hagiwara, Yukinari Sumino, Hiroshi Yokoya

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)

Abstract

We study bound-state effects on the t over(t, ̄) production cross section in the threshold region at hadron colliders. The bound-state effects are important particularly at the LHC where the gluon fusion is the dominant subprocess. Due to the formation of t over(t, ̄) resonances in the J = 0 color-singlet channel of g g → t over(t, ̄) and the large width of the top quark, the t over(t, ̄) invariant-mass distribution peaks at a few GeV below the t over(t, ̄) threshold, and it is significantly enhanced over the naive NLO prediction until several GeV above the threshold. We present predictions of the t over(t, ̄) invariant-mass distribution which incorporate both the bound-state effects and initial-state radiations up to NLO. The bound-state effects would lead to a substantial deformation of top-quark kinematical distributions in the threshold region.

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume666
Issue number1
DOIs
Publication statusPublished - 2008 Aug 7

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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