Effects of the Noncommutative Standard Model on WW scattering

Understand

We examine W pair production in the Noncommutative Standard Model constructed with the Seiberg-Witten map.

• Consideration of partial wave unitarity in the reactions WW to WW and e+e- to WW shows that the latter process is more sensitive and that tree-level unitarity is violated when scattering energies are of order a TeV and the noncommutative scale is below about a TeV.
• We find that WW production at the LHC is not sensitive to scales above the unitarity bounds.
• WW production in e+e- annihilation, however, provides a good probe of such effects with noncommutative scales below 300-400 GeV being excluded at LEP-II, and the ILC being sensitive to scales up to 10-20 TeV.