Electroweak Sudakov logarithms and real gauge-boson radiation in the TeV region

• Published in: The European physical journal. C, Particles and fields Vol. 70; no. 3; pp. 659 - 671
• Main Authors: Bell, G., Kühn, J. H., Rittinger, J.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01-12-2010; Springer; Springer Nature B.V
• Subjects: Analysis; Astronomy; Astrophysics and Cosmology; Bosons; Electroweak model; Elementary Particles; Exact sciences and technology; Gages; Gauge theory; Gauges; Hadrons; Heavy Ions; Logarithms; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Nuclear radiation; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article - Theoretical Physics; String Theory; The physics of elementary particles and fields; Gauge Boson; Real Radiation; Sudakov Factor; Virtual Correction; Initial State Radiation; TeV range; Invariant; Isospin; Gauge theory; SU theory; Elementary particles; Standard model; Radiative corrections; Phase space; Mathematical physics; Bosons
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-010-1489-x

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.