Chemistry: A Textbook for Colleges (McPherson, W.; Henderson, W. E.; Fernelius, W. C.; Mack, E., Jr.)

w(E) ≥

On e + e − → W + W − → 4f(+γ) at LEP2 ∗

The results on ee → WW → 4f(+γ) obtained by different groups are compared with each other. Differences in the results for the total cross section of up to about 0.6 % are traced back to different ways of implementing the double-pole approximation. Suppported by the BMFT, Bonn, Germany, Contract 05 HT9PBA2

Effects of TeV Scale Gravity on e+e− → W+W−

We study the process e+e− → W+W− to probe low-scale gravity at high energy linear colliders. A characteristic signature of extra-dimensions models is the forward-backward asymmetry due to the interference of spin2 graviton and spin-1 SM gauge boson exchange terms, even when rightpolarised electron beam is used. Our analysis shows that larger than 5% asymmetry is possible at a linear collider wi...

CP Violation in Heavy Neutrino Mediated e−e− →W−W−∗

We consider the reaction ee → WW mediated by possible heavy neutrino exchange at future LINAC energies of √ s >> 2mW . This reaction is sensitive to CP phases of the neutrino mixing matrices, even at the level of Born amplitudes. Certain integrated cross-sections are shown to have the power to resolve the CP phases when the experimental configurations are varied. Asymmetries sensitive to CP vio...

Quartic gauge couplings from e + e − → W + W − Z

Effective quartic gauge couplings on tree level appear in a strong interacting Higgs scenario, which could be relevant, e.g. if no standard model Higgs would be found 1. This scenario can be described in terms of an effective chiral Lagrangian valid for invariant energies m W,Z < √ s < 4πv, where the vacuum expectation value due to electroweak symmetry breaking is v = (√ 2G F) −1 ≃ 246 GeV. It ...