“School of Particles”
Back to Papers HomeBack to Papers of School of Particles
| Paper IPM / Particles / 15669 |
|
||||||
| Abstract: | |||||||
|
Applying the narrow-width approximation (NWA), we first review the NLO QCD predictions for the total decay rate of top quark considering two unstable intermediate particles: the W+-boson in the standard model (SM) of particle physics and the charged Higgs boson H+ in the generic type-I and II two-Higgs-doublet models, i.e. t→ b+W+/H+(→ τ+ντ). We then estimate the errors arised from this approximation at leading-order perturbation theory. Finally, we shall investigate the interference effects in the factorization of production and decay parts of intermediate particles. We will show that for nearly mass-degenerate states (mH+ ≈ mW+), the correction due to the interference effect is considerable
Download TeX format |
|||||||
| back to top | |||||||
