NLO correction to Higgs boson parameters in the 1/N expansion
arXiv:hep-ph/9711318 · doi:10.1016/S0370-2693(97)01402-0
Abstract
We present the result of a calculation of the next-to-leading correction to the Higgs propagator in the 1/N expansion, where the Higgs sector is treated as an O(N) symmetric sigma-model. The results are compared with two-loop perturbation theory. The existing discrepancy between the lowest order of the 1/N expansion and perturbation theory is dramatically reduced by including the NLO in 1/N. We find a maximum effective Higgs mass of 930-980 GeV. We give an approximate relation between Higgs width and mass, which can be used for phenomenological purposes.
5 pages LaTex, 1 eps figure included. To appear in Phys.Lett.B