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28 March 2024
 
  » arxiv » hep-ph/0305087

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Associated Higgs production with top quarks at the Large Hadron Collider: NLO QCD corrections
S. Dawson ; C. Jackson ; L.H. Orr ; L. Reina ; D. Wackeroth ;
Date 8 May 2003
Journal Phys.Rev. D68 (2003) 034022
Subject hep-ph
AffiliationBNL), C. Jackson (FSU), L.H. Orr (Rochester U.), L. Reina (FSU), D. Wackeroth (SUNY, Buffalo
AbstractWe present in detail the calculation of the O(alpha_s^3) inclusive total cross section for the process pp -> t-tbar-h, in the Standard Model, at the CERN Large Hadron Collider with center-of-mass energy sqrt(s_H)=14 TeV. The calculation is based on the complete set of virtual and real O(alpha_s) corrections to the parton level processes q-qbar -> t-tbar-h and gg -> t-tbar-h, as well as the tree level processes (q,qbar)g -> t-tbar-h-(q,qbar). The virtual corrections involve the computation of pentagon diagrams with several internal and external massive particles, first encountered in this process. The real corrections are computed using both the single and the two cutoff phase space slicing method. The next-to-leading order QCD corrections significantly reduce the renormalization and factorization scale dependence of the Born cross section and moderately increase the Born cross section for values of the renormalization and factorization scales above m_t.
Source arXiv, hep-ph/0305087
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