General arguments related to "triviality" predict that, in the broken phase of (lambda Phi(4))(4) theory, the condensate [Phi] rescales by a factor Z phi different from the conventional wave function renormalization factor, Z(prop). Using a lattice simulation in the Ising limit, we measure Z(phi) = m(2)chi from the physical mass and susceptibility and Z(prop) from the residue of the shifted-field propagator. We find that the two Z's differ, with the difference increasing rapidly as the continuum limit is approached. Since Z(phi) affects the relation of [Phi] to the Fermi constant, it can sizably affect the present bounds on the Higgs mass.
First lattice evidence for a nontrivial renormalization of the Higgs condensate
CEA, Paolo;
1998-01-01
Abstract
General arguments related to "triviality" predict that, in the broken phase of (lambda Phi(4))(4) theory, the condensate [Phi] rescales by a factor Z phi different from the conventional wave function renormalization factor, Z(prop). Using a lattice simulation in the Ising limit, we measure Z(phi) = m(2)chi from the physical mass and susceptibility and Z(prop) from the residue of the shifted-field propagator. We find that the two Z's differ, with the difference increasing rapidly as the continuum limit is approached. Since Z(phi) affects the relation of [Phi] to the Fermi constant, it can sizably affect the present bounds on the Higgs mass.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
