ar X iv : h ep - p h / 03 12 20 8 v 1 1 6 D ec 2 00 3 Production of four leptons in γγ - interaction

ar X iv : h ep - p h / 03 11 13 8 v 1 1 1 N ov 2 00 3 Physics at a γγ , eγ and e − e − Option for a Linear Collider

This report presents a review of the studies made in the working group on " γγ and eγ physics " of the ECFA/DESY workshop on linear collider physics. It reports on several new physics studies, in particular s-channel Higgs production. A summary of R&D activities for the interaction region is presented. The merits of e − e − collisions are briefly recalled.

ar X iv : h ep - p h / 03 12 27 6 v 1 1 9 D ec 2 00 3 The a 0 K + K − - vertex in light cone QCD sum rules

ar X iv : h ep - t h / 03 12 24 4 v 1 1 9 D ec 2 00 3 FIAN / TD / 07 – 03 On Sp ( 2 M ) Invariant Green Functions

Explicit form of two-point and three-point Sp (2M) invariant Green functions is found.

ar X iv : h ep - t h / 06 12 03 5 v 2 1 1 D ec 2 00 6 Dark energy induced by neutrino mixing

The energy content of the vacuum condensate induced by the neutrino mixing is interpreted as dynamically evolving dark energy.

ar X iv : h ep - t h / 06 12 12 8 v 1 1 3 D ec 2 00 6 Riemannian Geometry of Noncommutative Surfaces