Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-09-24
Nucl.Phys.B680:85-116,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
32 pages, LaTeX, 12 postscript figures
Scientific paper
10.1016/j.nuclphysb.2003.12.028
We have calculated the complete O(alpha) and O(alpha_s) radiative corrections to the Higgs-production process e+ e- -> t anti-t H in the Standard Model. This process is particularly interesting for the measurement of the top-quark Yukawa coupling at a future e+ e- collider. The calculation of the O(alpha) corrections is described in some detail including, in particular, the treatment of the soft and collinear singularities. The discussion of numerical results focuses on the total cross section as well as on angular and energy distributions of the outgoing particles. The electroweak corrections turn out to be sizable and can reach the order of +/-10%. They result from cancellations between electromagnetic, fermionic, and weak bosonic corrections, each of which are of the order of +/-10%.
Denner Ansgar
Dittmaier Stefan
Roth Marcel
Weber Matthias
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