Agnes Mocsy

Quarkonium states in an anisotropic QCD plasma

We consider quarkonium in a hot quantum chromodynamics (QCD) plasma which, due to expansion and nonzero viscosity, exhibits a local anisotropy in momentum space. At short distances the heavy-quark potential is known at tree level from the hard-thermal loop resummed gluon propagator in anisotropic perturbative QCD. The potential at long distances is modeled as a QCD string which is screened at the same scale as the Coulomb field. At asymptotic separation the potential energy is nonzero and inversely proportional to the temperature. We obtain numerical solutions of the three-dimensional Schroedinger equation for this potential. We find that quarkonium binding is stronger at nonvanishing viscosity and expansion rate, and that the anisotropy leads to polarization of the P-wave states.

Potential models for quarkonia

In this paper I discuss what we can learn about quarkonium dissociation from lattice-potential based models. Special emphasis is given to results obtained in agreement by different models, and to the relevance of lattice QCD for potential models. Future directions are also discussed.

Analyzing the Power Spectrum of the Little Bangs

Abstract In this talk we discuss the analogy between data from heavy-ion collisions and the Cosmic Microwave Background. We identify p T correlations data as the heavy-ion analogy to the CMB and extract a power-spectrum from the heavy-ion data. We define the ratio of the final state power-spectrum to the initial coordinate-space eccentricity as the transfer-function. From the transfer-function we find that higher n terms are suppressed and we argue that the suppression provides information on length scales like the mean-free-path. We make a rough estimate of the mean-free-path and find that it is larger than estimates based on the centrality dependence of ν 2 .

Quarkonium Spectral Functions

Abstract In this talk I summarize the progress achieved in recent years on the understanding of quarkonium properties at finite temperature. Theoretical studies from potential models, lattice QCD, and effective field theories are discussed. I also highlight a bridge from spectral functions to experiment.

S-wave quarkonia in potential models

We discuss S-wave quarkonia correlators and the spectral function using the Wong potential and show that these do not agree with the lattice results.

Detecting a first-order transition in the QCD phase diagram with baryon-baryon correlations

We suggest baryon-baryon correlations as an experimentally accessible signature for a first-order phase transition between a baryon-rich phase, like quarkyonic, and a baryon-suppressed hadronic phase in the QCD phase diagram. We examine the consequences of baryon-rich bubble formation in an expanding medium and show how the two-particle correlations vary in the transverse and longitudinal direction depending on the strength of the radial flow, the bubble temperature, and the time when the baryons are emitted.

HEAVY QUARKONIA ABOVE DECONFINEMENT.

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

Potential models for quarkonia - What can we learn from potential models at finite temperature?

In this paper I discuss what we can learn about quarkonium dissociation from lattice-potential based models. Special emphasis is given to results obtained in agreement by different models, and to the relevance of lattice QCD for potential models. Future directions are also discussed.

The ηC above deconfinement

In this paper I discuss the pseudoscalar charmonium spectral function and correlator as obtained using a screened potential.