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



ID: 545003.0, MPI für Physik / MPI für Physik
Two-loop electroweak next-to-leading logarithmic corrections to massless fermionic processes
Authors:Denner, A.; Jantzen, B.; Pozzorini, S.
Date of Publication (YYYY-MM-DD):2007
Title of Journal:Nuclear Physics B
Journal Abbrev.:Nucl.Phys.B
Issue / Number:761
Start Page:1
End Page:62
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We consider two-loop leading and next-to-leading logarithmic virtual corrections to arbitrary processes with external massless fermions in the electroweak Standard Model at energies well above the electroweak scale. Using the sector-decomposition method and alternatively the strategy of regions we calculate the mass singularities that arise as logarithms of Q^2/MW^2, where Q is the energy scale of the considered process, and 1/\epsilon poles in D=4-2\epsilon dimensions, to one- and two-loop next-to-leading logarithmic accuracy. The derivations are performed within the complete electroweak theory with spontaneous symmetry breaking. Our results indicate a close analogy between the form of two-loop electroweak logarithmic corrections and the singular structure of scattering amplitudes in massless QCD. We find agreement with the resummation prescriptions that have been proposed in the literature based on a symmetric SU(2) \times U(1) theory matched with QED at the electroweak scale and provide new next-to-leading contributions proportional to ln(MZ^2/MW^2).
Classification / Thesaurus:Phenomenology of High Energy Physics
Comment of the Author/Creator:63 pages, LaTeX
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2006-109
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ph/0608326
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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