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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 544583.0, MPI für Physik / MPI für Physik
Four-fermion production at gamma gamma colliders: 2. Radiative corrections in double-pole approximation
Authors:Bredenstein, A.; Dittmaier, S.; Roth, M.
Date of Publication (YYYY-MM-DD):2005
Title of Journal:European Physical Journal C
Journal Abbrev.:Eur.Phys.J.C
Issue / Number:44
Start Page:27
End Page:49
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The O(alpha) electroweak radiative corrections to gamma gamma --> WW --> 4f within the electroweak Standard Model are calculated in double-pole approximation (DPA). Virtual corrections are treated in DPA, leading to a classification into factorizable and non-factorizable contributions, and real-photonic corrections are based on complete lowest-order matrix elements for gamma gamma --> 4f + gamma. Soft and collinear singularities appearing in the virtual and real corrections are combined alternatively in two different ways, namely by using the dipole subtraction method or by applying phase-space slicing. The radiative corrections are implemented in a Monte Carlo generator called COFFERgammagamma, which optionally includes anomalous triple and quartic gauge-boson couplings in addition and performs a convolution over realistic spectra of the photon beams. A detailed survey of numerical results comprises O(alpha) corrections to integrated cross sections as well as to angular, energy, and invariant-mass distributions. Particular attention is paid to the issue of collinear-safety in the observables.
Classification / Thesaurus:Phenomenology of High Energy Physics
Comment of the Author/Creator:42 pages, latex, 34 postscript figures
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2005-24
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ph/0506005
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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