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



ID: 542922.0, MPI für Physik / MPI für Physik
Electroweak Absorptive Parts in NRQCD Matching Conditions
Authors:Hoang, A. H.; Reisser, C. J.
Date of Publication (YYYY-MM-DD):2005
Title of Journal:Physical Review D
Journal Abbrev.:Phys.Rev.D
Issue / Number:71
Start Page:074022
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:Electroweak corrections associated to the instability of the top quark to the next-to-next-to-leading logarithmic (NNLL) total top pair threshold cross section in e+e- annihilation are determined. Our method is based on absorptive parts in electroweak matching conditions of the NRQCD operators and the optical theorem. The corrections lead to ultraviolet phase space divergences that have to be renormalized and lead to NLL mixing effects. Numerically, the corrections can amount to several percent and are comparable to the known NNLL QCD corrections.
Classification / Thesaurus:Phenomenology of High Energy Physics
Comment of the Author/Creator:17 pages, revtex4, 4 postscript figures included
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2004-171
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ph/0412258
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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