Electroweak corrections to the top quark decay - art. no. 017301

Authors
Oliveira, SM Brucher, L Santos, R Barroso, A
Citation
Sm. Oliveira et al., Electroweak corrections to the top quark decay - art. no. 017301, PHYS REV D, 6401(1), 2001, pp. 7301
Citations number
23
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6401
Issue
1
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010701)6401:1<7301:ECTTTQ>2.0.ZU;2-2
Abstract
We calculate the one-loop electroweak corrections to the decay t --> bW(+), including the counterterm for the CKM matrix elements V-tb. Previous calcu lations used an incorrect deltaV(tb) that led to a gauge dependent amplitud e. However, since the contribution stemming from deltaV(tb) is small, those calculations only underestimate the width by roughly 1 part in 10(5).