1,865 research outputs found
Vacuum condensates and `ether-drift' experiments
The idea of a `condensed' vacuum state is generally accepted in modern
elementary particle physics. We argue that this should motivate a new
generation of precise `ether-drift' experiments with present-day technology.Comment: Latex file, 12 pages, no figure
First lattice evidence for a non-trivial renormalization of the Higgs condensate
General arguments related to ``triviality'' predict that, in the broken phase
of theory, the condensate re-scales by a factor
$Z_{\phi}$ different from the conventional wavefunction-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 to the Fermi
constant it can sizeably affect the present bounds on the Higgs mass.Comment: 10 pages, 3 figures, 1 table, Latex2
The theory on the lattice: effective potential and triviality
We compute numerically the effective potential for the
theory on the lattice. Three different methods were used to determine the
critical bare mass for the chosen bare coupling value. Two different methods
for obtaining the effective potential were used as a control on the results. We
compare our numerical results with three theoretical descriptions. Our lattice
data are in quite good agreement with the ``Triviality and Spontaneous Symmetry
Breaking'' picture.Comment: Contribution to the Lattice '97 proceedings, LaTeX, uses espcrc2.sty,
3 page
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