Critical stability

Session

T1

16 Oct 2008, 15:00

Ettore Majorama Centre for Scientific Culture

11. Four-quark stability

Dr Javier Vijande (University of Valencia)

16/10/2008, 15:00

Talks at Critical Stability V (Erice, October 2008)

Normal

In order to discuss the stability of four–quark states against dissociation into two isolated mesons we shall present in this talk an exact method to study four-quark systems based on the hyperspherical harmonics formalism. We shall apply it to several physical systems of interest containing two heavy and two light quarks using different non–relativistic quark-quark potentials. Our...

32. Proof of stability of tetraquarks in a minimal-path model of linear confinement

Prof. Jean-Marc Richard (LPSC, University of Grenoble, France)

16/10/2008, 15:35

Talks at Critical Stability V (Erice, October 2008)

Normal

The quark--antiquark confining potential, V2(r)=r (in appropriate units) is generalised to baryons as V3=min(d1+d2+d3), where di is the distance of the ith quark to a junction whose location is adjusted to minimise the interaction. Hence estimating V3 involves solving the famous Fermat--Torricelli problem. The extension to the tetraquark problem, initiated by several authors, has been...

38. Universality in low-energy few-body systems and leading corrections

Dr Lucas Platter (Ohio State University)

16/10/2008, 16:10

Talks at Critical Stability V (Erice, October 2008)

Normal

The zero range model with proper renormalization is a powerful too calculate a variety of interesting low-energy observables in nuclear and atomic physics. In the three-body sector this approach reveals many interesting features (such as approximate discrete scale invariance) of systems with large scattering length. In my talk I will discuss the zero-range in the more general context of...

57. Few-body Physics in Ultracold Gases: The Role of Efimov Physics

Dr Jose D'Incao (U. Colorado)

16/10/2008, 17:00

Talks at Critical Stability V (Erice, October 2008)

Normal

In this talk, I will discuss general properties of few-body collisions and their influence on ultracold quantum gases in the regime where interatomic interactions are strongly affected by a Feshbach resonance. Since the early days of the achievement of Bose-Einstein condensation, it has been recognized that few-body processes are of crucial importance in determining the stability of...

48. Few-body physics with ultracold Cs atoms and molecules

Dr Francesca Ferlaino (Institut für Experimentalphysik and Institut für Quantenoptik und Quanteninformation, Innsbruck, Austria)

16/10/2008, 17:35

Talks at Critical Stability V (Erice, October 2008)

Normal

Ultracold atomic gases are versatile systems to study few-body physics because of full control over the external and internal degrees of freedom. The scattering properties can be controlled because of the magnetic tunability of the two-body scattering length in the proximity of a Fes- hbach resonance and weakly bound dimers can be produced. Here, we experimentally explore three- and...

67. Multiple scattering of light in cold atoms : from light localisation to plasma physics

Robin Kaiser (CNRS)

16/10/2008, 18:10

Talks at Critical Stability V (Erice, October 2008)

Normal

Cold atoms have emerged as ideal quantum system to study coherent transport properties of light. First experiments have established that dilute samples with large optical thickness allow studying weak localization of light. The present goal of this research is to study coherent transport of photons in dense samples. Anderson localization of light or superradiance are among the most...