arXiv subjects

C. Grosse-Knetter

Publications and source records attributed to C. Grosse-Knetter.

5 recordsLinked to original sources

arXiv2011

Two- and Three Vector Boson Production in e+ e- Collisions within the BESS Model

The BESS model is the Higgsless alternative to the standard model of electroweak interaction with nonlinear realized spontaneous symmetry breaking. Since it is non-renormalizable new couplings (not existing in the SM) are induced at each loop order. On the basis of the one loop induced gauge boson self-couplings we calculated the cross sections for the two and three gauge boson production processes in $e^+e^-$ collisions. Measurements of these cross sections in a planned $e^+e^-$ linear collider at $\sqrt s = 500 GeV$ (NLC) will supply a good empirical test of the gauge boson self interactions and thus should enable to discriminate between SM and its alternatives (BESS).

hep-ph↗

arXiv1995

On Non-Standard Couplings among the Electroweak Vector Bosons

Application of a Stueckelberg transformation allows one to connect various Lagrangians which have been independently proposed for non-standard couplings. We discuss the reduction of the number of independent parameters in the Lagrangian and compare symmetry arguments with dimensional arguments.

hep-ph↗

arXiv1994

On the Role of the Higgs Mechanism in Present Electroweak Precision Tests

Based on the observables $\MW$, $Γ_l$, $\bar\sw^2(\MZ^2)$, we evaluate the parameters $Δx, Δy$ and $\varepsilon$ at one-loop level within an electroweak massive vector-boson theory, which does not employ the Higgs mechanism. The theoretical results are consistent with the experimental ones on $Δx$, $Δy$, $\varepsilon$. The theoretical prediction for $Δy$ coincides with the standard-model one (apart from numerically irrelevant terms which vanish for $\MH\to\infty$). Non-renormalizability only affects $Δx$ and $\varepsilon$, which differ from the standard-model results by the replacement $\log\MH\to\logΛ$ for a heavy Higgs mass, $\MH$ (where $Λ$ denotes an effective UV cut-off).

hep-ph↗

arXiv1992

Bounds on Bess Model Parameters from Vector-Boson Production in e+e- Collisions

The BESS model is the Higgs-less alternative to the standard model of electroweak interaction, based on nonlinearly realized spontaneous symmetry breaking. Since it is nonrenormalizable, new couplings (not existing in the SM) are induced at each loop order. On the basis of the one loop induced vector-boson self-couplings we study the two- and three-vector-boson-production processes in $e^+e^-$ collisions at $\sqrt{s}=500 GeV$, the expected energy of the next $ e^+e^-$ linear collider (NLC). Assuming that NLC results will agree with the SM predictions within given accuracy we identify the bounds for the free parameters of the BESS model.

hep-ph↗

arXiv1992

Production of Three Vector Bosons in e+e- Annihilation as a Test of W+-, Z, gamma Self-Interactions

We study the vector-boson production processes e+e- --> WWZ and e+e- -->WWgamma which are directly affected by the trilinear and quadrilinear self couplings of the W, Z and gamma. Our analysis is based upon a single-parameter effective-Lagrangian model for these self interactions which contains the standard model as a special case. Consequences for the phenomenology at an e+e- collider of 500 GeV (NLC) are discussed, and fits of the free parameter around its standard model value are carried out.

hep-ph↗