XXXth International Colloquium on Group Theoretical Methods in Physics (ICGTMP) (Group30)

Theoretical Physics Group

The invariant mass spectrum of the lepton pair in inclusive semileptonic B → Xulν decay yields a model independent determination of |Vub| [1]. Unlike the lepton energy and hadronic invariant mass spectra, nonperturbative effects are only important in the resonance region, and play a parametrically suppressed role when dΓ/dq is integrated over q > (mB − mD) , which is required to eliminate the B...

Theoretical Physics group

We briefly review some results in the theory of quantum W3 gravity in the chiral gauge. We compare them with similar results in the analogous but simpler cases of d = 2 induced gauge theories and d = 2 induced gravity. Contribution to the Trieste Summerschool on High Energy Physics and Cosmology, Aug. 1991. Work supported in part by grant NSF-91-08054. This work was supported in part by the Dir...

International Centre for Theoretical Physics

Mathematical Methods of Theoretical Physics

Csu Physics Colloquium

The discovery of a new topological form of magnetic order in the family of cubic Dzyaloshinskii-Moriya helimagnets has recently attracted increasing scientific interest. This new magnetic state consists of a lattice of skyrmions, i.e., magnetic vortices characterized by a topological winding number. This implies that skyrmions represent topologicallyprotected magnetic particles with a skyrmion ...