Forbidden weak interactions at very high energies

Weak interactions at very high energies: The role of the Higgs-boson mass

We give an S-matrix-theoretic demonstration that if the Higgs-boson mass exceeds M, = (8m'/3GF)", parital-wave unitarity is not respected by the tree diagrams for two-body scattering of gauge bosons, and the weak interactions must become strong at high energies. We exhibit the relation of this bound to the structure of the Higgs-Goldstone Lagrangian, and speculate on the consequences of strongl...

Weak Interactions of Supersymmetric Staus at High Energies

Neutrino telescopes may have the potential to detect the quasi-stable staus predicted by some supersymmetric models. Detection depends on stau electromagnetic energy loss and weak interactions. We present results for the weak interactions contribution to the energy loss of high energy staus as they pass through rock. We show that the neutral current weak interaction contribution is much smaller...

Muon Collider Physics at Very High Energies

Muon colliders might greatly extend the energy frontier of collider physics. One can contemplate circular colliders with center-of-mass energies in excess of 10 TeV. Some physics issues that might be relevant at such a machine are discussed.

Photon Interactions Liverpool, at High Energies

Hadronic photon-photon interactions at high energies.

Photon-photon collisions are investigated in the framework of the two-component Dual Parton Model. The model contains contributions from direct, resolved soft and resolved hard interactions. All free parameters of the model are determined in fits to hadronhadron and photon-hadron cross section data. The model is shown to agree well to hadron production data from hadron-hadron and photon-hadron ...