Stephen Godfrey

Heavy quarkonium physics

This report is the result of the collaboration and research effort of the Quarkonium Working Group over the last three years. It provides a comprehensive overview of the state of the art in heavy-quarkonium theory and experiment, covering quarkonium spectroscopy, decay, and production, the determination of QCD parameters from quarkonium observables, quarkonia in media, and the effects on quarkonia of physics beyond the Standard Model. An introduction to common theoretical and experimental tools is included. Future opportunities for research in quarkonium physics are also discussed.

Model-independent global constraints on new physics.

Using effective-Lagrangian techniques we perform a systematic survey of the lowest-dimension effective interactions through which heavy physics might manifest itself in present experiments. We do not restrict ourselves to special classes of effective interactions (such as oblique corrections). We compute the effects of these operators on all currently well-measured electroweak observables, both at low energies and at the

Charmonium options for the X(3872)

Z

Light meson spectroscopy

resonance, and perform a global fit to their coefficients. Despite the fact that a great many operators arise in our survey, we find that most are quite strongly bounded by the current data. We use our survey to systematically identify those effective interactions which are not well bounded by the data---these could very well include large new-physics contributions. Our results may also be used to efficiently confront specific models for new physics with the data, as we illustrate with an example.

Testing the nature of the DsJ∗(2317)+ and DsJ(2463)+ states using radiative transitions

In this paper we consider all possible

Discovery and identification of extra gauge bosons

1D

A global fit to extended oblique parameters

and

Properties of the charmed P-wave mesons

2P

c \bar c

coverline{c}