NRQCD and Quarkonia

We review recent progress in Non-Relativistic QCD and in related Non-Relativistic Effective Field Theories with emphasis on the applications to heavy quarkonia.Comment: 24 pages, invited talk at the Conference HQL06, Munich, October 16-20 2006. One reference adde

Probing the QCD vacuum

Heavy quark bound states are used as significative probes of the QCD vacuum and the mechanism of confinement.Comment: 13 pages, sprocl.sty, 2 figures, Invited talk given at the XVIII Autumn School ``Topology of Strongly Correlated Systems'', Lisbon, Portugal, 8-13 October, 200

Heavy Quarkonium at zero and finite temperature: an effective field theory perspective

I discuss quarkonium physics at zero and finite temperature in the framework of nonrelativistic effective field theories.Comment: 9 pages, invited plenary talk at Chiral10, International Workshop on Chiral Symmetry in Hadrons and Nuclei, Valencia, (Spain), June 21-24, 201

The BcB_c mass up to order αs4\alpha_s^4

We evaluate in perturbative QCD, up to order $\alpha_s^4$, the mass of the $B_c$. We use the so-called 1S-mass in order to improve the convergence of the perturbative series. Our result is $E(B_c)_{pert} = 6326^{+29}_{-9}$ MeV. Non-perturbative effects are discussed. A comparison with potential models seems to be consistent with non-perturbative contributions of the order $- (40\div 100)$ MeV.Comment: 14 pages, revtex, 2 figures, minor changes, discussion on the non-perturbative corrections added, final version to appear in Phys. Rev.