Scale setting in top quark decays

Journal Article (Journal Article)

We compute the O(β0α2s) QCD corrections to the Standard Model decay t → W+ b as well as the non standard decay t → H+ b. We then use our results to compute the BLM scale for these decays, and study the dependence of the BLM scale on the mass of the boson in the decay. We find that the BLM procedure gives extremely small scales when top decays into heavy bosons. When we try to improve the BLM scale by reexpressing rates as a functions of the top quark running mass, we find the BLM scale exhibits unnatural dependence on the boson mass, casting doubts on the applicability of the BLM procedure to these processes.

Full Text

Duke Authors

Cited Authors

  • Mehen, T

Published Date

  • August 8, 1996

Published In

Volume / Issue

  • 382 / 3

Start / End Page

  • 267 - 272

International Standard Serial Number (ISSN)

  • 0370-2693

Digital Object Identifier (DOI)

  • 10.1016/0370-2693(96)00681-8

Citation Source

  • Scopus