Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-04-11
Nucl.Phys.B853:49-62,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 4 figures
Scientific paper
10.1016/j.nuclphysb.2011.07.014
We study the so-called HEIDI models, which are renormalizable extensions of the standard model with a higher dimensional scalar singlet field. As an additional parameter we consider a higher-dimensional mixing mass parameter. This leads to enriched possibilities compared to a previous study. We find effective spectral densities of the Higgs propagator, consisting of one, two or no particle peaks, together with a continuum. We compare with the LEP-2 data and determine for which range of the model parameters the data can be described. Assuming two peaks to be present we find for the new mass scale $\nu\approx 56\pm12 \gev$, largely independent of the dimension. In the limiting case of $d\rightarrow 6$ and two peaks we find a higher dimensional coupling constant $\alpha_6=0.70 \pm 0.18$, indicative of strong interactions among the higher dimensional fields. The LHC will not be able to study this Higgs field.
der Bij J. van J.
Pulice Beyhan
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