Normalization of QCD corrections in top quark decay

Brian H. Smith; M. B. Voloshin

doi:10.1016/0370-2693(94)01270-9

Normalization of QCD corrections in top quark decay

Brian H. Smith, M. B. Voloshin

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

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 α_s^MS(0.122m_t). 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 language	English (US)
Pages (from-to)	176-180
Number of pages	5
Journal	Physics Letters B
Volume	340
Issue number	3
DOIs	https://doi.org/10.1016/0370-2693(94)01270-9
State	Published - 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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abstract = "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.",

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AU - Voloshin, M. B.

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N2 - 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.

AB - 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.

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VL - 340

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ER -

Normalization of QCD corrections in top quark decay

Abstract

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