Normalization of QCD corrections in top quark decay

Brian H. Smith, M. B. Voloshin

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


We discuss the effects of QCD corrections to the on-shell decay t → bW. We resolve the scale ambiguity using the Brodaky-Lepage-Mackenzie scheme, and find that the appropriate coupling constant is αsMS(0.122mt). The largest long distance contribution comes from the definition of the on-shell mass of the top quark. We note that QCD corrections to the electroweak ρ{variant} parameter are extremely small when the ρ{variant} parameter is expressed in terms of the top quark width.

Original languageEnglish (US)
Pages (from-to)176-180
Number of pages5
JournalPhysics Letters B
Issue number3
StatePublished - Dec 8 1994

Bibliographical note

Funding Information:
This work was supporteidn partb y DOE grantD E-AC-02-83ER40105B.H S is supportebdy the University of MinnesotaD octoralD issertationFe llowship program.


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