Recent Progress on Perturbative QCD Fragmentation Functions

The recent development of perturbative QCD (PQCD) fragmentation functions has strong impact on quarkonium production. I shall summarize $B_c$ meson production based on these PQCD fragmentation functions, as well as, the highlights of some recent activities on applying these PQCD fragmentation functions to explain anomalous $J/\psi$ and $\psi'$ production at the Tevatron. Finally, I discuss a fragmentation model based on the PQCD fragmentation functions for heavy quarks fragmenting into heavy-light mesons.Comment: 13 pages and 6 Postscript figures, Standard LaTeX. Complete Postscript version can be found at http://www.ph.utexas.edu/~cheung/paper/hopkin/hopkin-hep.ps.gz Invited talk at PASCOS/HOPKINS 1995 Symposium, Johns Hopkins University, Baltimore, Maryland, March 22--25, 199

Muon-proton Colliders: Leptoquarks, Contact Interactions and Extra Dimensions

We discuss the physics potential of the $\mu p$ collider; especially, leptoquarks, leptogluons, R-parity violating squarks, contact interactions, and large extra dimensions. We calculate the sensitivity reach for these new physics at $\mu p$ colliders of various energies and luminosities.Comment: 8 pages. Talk at the MuMu99, San Francisco C