The spectrum of gluons in the presence of a static quark-antiquark pair is studied using Monte Carlo simulations on anisotropic space-time lattices. For very small quark-antiquark separations R, the level orderings and approximate degeneracies disagree with the expectations from an effective string theory. As the quarkantiquark separation R increases, a dramatic rearrangement of the energies oc...

It now appears phenomenologically that the third family may be essentially diierent from the rst two. Particularly the high value of the top quark mass suggests a special role. In the standard model all three families are treated similarly becoming exactly the same at asymptotically high energies] so I need to extend the model to accommodate the goal of a really diierent third family. In this a...

Self-avoiding walks on a three-dimensional ~3D! simple cubic lattice are often used to model polymers, especially proteins. The Hamiltonian is generally taken to be a function of contacts between sequentially nonadjacent residues. The set of all conformations having a particular set of contacts occupies the same energy level, and one would like to estimate the degeneracy or chain entropy of the...

In the field of quantum chaos, the study of energy levels plays an important role. The aim of this review paper is to critically discuss some of the main contributions regarding the connection between classical dynamics, semi-classical quantization and spectral statistics of energy levels. In particular , we analyze in detail degeneracies and quasi-crossings in the eigenvalues of quantum Hamilt...

The evolution of single-particle energies with varying isospin asymmetry in the shell model is an important issue when predicting changes in the shell structure for exotic nuclei. In many cases pseudospin partner levels, that are almost degenerate in energy for stable nuclei, are relevant in extracting the size of the shell gaps. A breaking of the pseudospin symmetry can affect the size of thes...

We study how the eightfold-degeneracy in the (θ13, δ) plane observed in γ ∼ 100 β-beams can be reduced by periodically changing the ions in the storage ring. This “ions cocktail” allows to change the neutrino energy, at fixed γ, by choosing ions with different decay energies. We propose to combine the standard He and Ne beams with Li and B ones. These latter two ions have peaked νe → νμ oscilla...

the dynamic behavior of three high manganese steels with very different stacking faultenergy (sfe) values (4-30 mj/m2) were studied using high strain rate torsional tests. the hotrolledmicrostructure of the steel with the lowest sfe of 4 mj/m2 consisted of a duplex mixture ofaustenite and ε-martensite, but those of the other two steels were fully austenitic. the deformedmicrostructures were stu...