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[en] It has recently been discovered that the strong interaction has a hidden symmetry associated with particles containing a single heavy quark. The physics underlying this symmetry is simple, but it has far-reaching consequences. The basic ideas of heavy quark symmetry as well as its impact on such diverse problems as strong interaction spectroscopy and precision tests of the Standard Model will be discussed
[en] This paper presents some features of the new topological bootstrap theory proposed by G.F. Chew and the author. This theory associates to each component of a topological S-matrix expansion a pair of 2-dimensional objects ('surfaces') together with some extra structures, in particular embedded graphs. One of these objects, the 'classical surface' Σsub(C) is connected to the space-time description of collisions, the other one, the 'quantum surface' Σsub(C), with internal, discrete quantum numbers. Some consequences and symmetries are considered
[en] In this contribution I will give an overview of the current activities worldwide to explore the phase structures of strongly interacting matter in the region of high baryochemical potential. After a review of the current and future high μB facilities I will briefly discuss the anticipated physics performance of several observables.
[en] Electronic transport properties of out-of-plane graphene nanoribbon intersections have been investigated by using computational method. The inter-distance between two graphene nanoribbons is found to affect the transport properties strongly and its affection can be neglected for larger ones, even under an external bias. Wider graphene nanoribbons will bring stronger interaction into the system, and result in more transmission dips. Moreover, the stacking configuration between two graphene nanoribbons is found to be crucial for the electronic transport under an external bias, as it can affect the electronic transport strongly near the charge neutral point. -- Highlights: ► Transport properties of out-of-plane GNR intersections which constructs from one zigzag GNR and one armchair GNR were studied. ► The effect of the inter-distance, an external bias and the stacking types on the transport properties has been studied. ► The inter-distance is found to affect the transport properties strongly, even under an external bias. ► The stacking configuration between the two GNRs is found to be crucial for the electronic transport under external bias.
[en] A brief survey of the strong interaction theory is presented. The basic principles of quantum chromodynamics and phenomenological approaches to strong interaction processes are described. Their predictions and recent achievements in describing experimental data at high energies are considered. (physics of our days)
[en] Directed transport of interacting active (self-propelled) Brownian particles is numerically investigated in confined geometries (entropic barriers). The self-propelled velocity can break thermodynamical equilibrium and induce the directed transport. It is found that the interaction between active particles can greatly affect the ratchet transport. For attractive particles, on increasing the interaction strength, the average velocity first decreases to its minima, then increases, and finally decreases to zero. For repulsive particles, when the interaction is very weak, there exists a critical interaction at which the average velocity is minimal, nearly tends to zero, however, for the strong interaction, the average velocity is independent of the interaction