Electroweak Sudakov logarithms and real gauge-boson radiation in the TeV region |
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Authors: | G Bell J H Kühn and J Rittinger |
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Institution: | 1.Institut für Theoretische Teilchenphysik,Universit?t Karlsruhe,Karlsruhe,Germany;2.Institute for Theoretical Physics,University of Bern,Bern,Switzerland |
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Abstract: | Electroweak radiative corrections give rise to large negative, double-logarithmically enhanced corrections in the TeV region.
These are partly compensated by real radiation and, moreover, affected by selecting isospin-non-invariant external states.
We investigate the impact of real gauge boson radiation more quantitatively by considering different restricted final state
configurations. We consider successively a massive abelian gauge theory, a spontaneously broken SU(2) theory and the electroweak Standard Model. We find that details of the choice of the phase space cuts, in particular whether
a fraction of collinear and soft radiation is included, have a strong impact on the relative amount of real and virtual corrections. |
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