No abstract available

[en] Introductory remarks to Parallel Session C7 at the XXth International Conference on High Energy Physics are presented

[en] In this talk I summarize our current understanding of quarkonium states above deconfinement based on phenomenological and lattice QCD studies

[en] A renormalization group approach to heavy quarkonium decays is developed. Exclusive two-meson decays and inclusive decays are considered. (orig.)

[en] We present a brief overview of the most relevant current issues related to quarkonium production in high energy proton-proton and proton-nucleus collisions along with some perspectives. After reviewing recent experimental and theoretical results on quarkonium production in pp and pA collisions, we discuss the emerging field of polarization studies. Afterwards, we report on issues related to heavy-quark production, both in pp and pA collisions, complemented by AA collisions. To put the work in broader perpectives, we emphasize the need for new observables to investigate the quarkonium production mechanisms and reiterate the qualities that make quarkonia a unique tool for many investigations in particle and nuclear physics.

No abstract available

[en] It is pointed out that in models of quark confinement the usual analysis of spin dependent forces in terms of scalar or vector potentials may be inappropriate. The special role that the self energy plays in such models and its consequences for heavy quarkonia are discussed

[en] The analysis of data collected by the CMS experiment in 2010 (equivalent to an integrated luminosity of 40 pb^-1) has yielded several physics results concerning the production mechanisms of heavy flavors at the unprecedented center-of-mass energy of 7TeV. Reconstruction techniques of heavy-flavored particles will be discussed, with particular focus on the triggers expressly designed to select them. Measurements of the bb cross-section both with jet 'b-tagging' techniques and exclusive states, such as B⁰, B^+- and B⁰_s, will be presented, along with comparisons with theoretical predictions. Charmonium and bottomonium cross-section measurements, as well as the first determinations of the B-decay feed-down fraction for J/ψ, will be shown.

[en] A brief review of the experimental situation concerning the electrically charged charmoniumlike meson candidates, Z^-, is presented. (authors)

[en] Test of Quantum Chromodynamics in quarkonium decays are discussed. Quantitative predictions of QCD for the hadronic widths of quarkonium decays are shown to fit well with the new experimental data on PSI and UPSILON. A new estimate for the PSI' decay width into ordinary hadrons is also given