Radiative corrections to top-quark decay
- Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel (IL)
- Department of Applied Mathematics, University of Western Ontario, London, Ontario, Canada N6A 5B9 (CA)
- Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (USA)
We calculate all radiative corrections to one-loop order for the main decay of the top quark, {ital t}{r arrow}{ital b}+{ital W}, in the standard model, retaining exact dependence on all masses. For {ital m}{sub {ital t}}=150 GeV and {ital M}{sub {ital H}}=100 GeV we find a {minus}2.9% ({minus}6.9%) correction with a very weak dependence on the Higgs-boson mass, in renormalization schemes that use {alpha}, {ital G}{sub {ital F}}, and {ital M}{sub {ital Z}} ({ital G}{sub {ital F}}, {ital M}{sub {ital W}}, and {ital M}{sub {ital Z}}) as input parameters. Out of the above results, {minus}8.5% is due to QCD. The {ital m}{sub {ital t}} and {ital M}{sub {ital H}} dependence is given up to 300 and 1000 GeV, respectively. The inadequacy of a leading {ital m}{sub {ital t}} calculation is pointed out.
- OSTI ID:
- 5591992
- Journal Information:
- Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:24; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electroweak radiative corrections to [ital t][r arrow][ital H][sup +][ital b] for a heavy top quark
Higgs-boson decay to four fermions including a single top quark below [ital t[bar t]] threshold
Related Subjects
645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
MASS
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
RADIATIVE CORRECTIONS
RENORMALIZATION
STANDARD MODEL
TOP PARTICLES
UNIFIED GAUGE MODELS