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Scientific Committe Organizing Committe - Harvard
Scientific Committe Organizing Committe - Harvard

... The Efimov effect can be investigated by use of coordinate space Faddeev equations for shortrange interactions[1]. Occurrence in halo nuclei[2] is limited to two neutrons and an ordinary spin-zero nucleus because all other systems involve the long-range Coulomb interaction. Two light and one heavier ...
The Concept of Collision Strength and Its Applications
The Concept of Collision Strength and Its Applications

... as incomplete gamma functions with different orders Γ(α, ymin ) as the factor that appeared in the Arrhenius-like formula. A special function Υj (α, x), which can be used to express all of the averages of physical terms for a test particle in Maxwellian field particles, is obtained. All of the physi ...
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... constraints of the EU energy and climate policy goals, significant amounts of new nuclear generating capacity need to be deployed in Europe over the next few decades. An estimate of corresponding needs is given. Finally, the European Commission’s actions towards creating an EU-wide framework for a r ...
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... inelastic scattering experiments have mapped the momentum distributions of light quarks over a large range in x and Q2. On the other hand, the study of the gluons within the nucleon is only possible at high energies, with the established technique being the determination of the gluon momentum distr ...
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The potential difference is the work per unit charge, which is

Catalytic decomposition of N2O over Rh/Zn–Al2O3 catalysts
Catalytic decomposition of N2O over Rh/Zn–Al2O3 catalysts

... content (ca. 1 wt%) and high dispersion, as demonstrated by TEM and Rh dispersion data later. Rh/ZnO-800 shows very sharp peaks corresponding to ZnO, implying that the ZnO support is highly crystalline and has a low surface area. Again, no Rh or Rh2O3 can be seen on the XRD pattern of Rh/ZnO-800. Fi ...
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... edition more useful. We were not able to act on all the suggestions that were received, because some were in conflict with others or were impossible to carry out for technical reasons. But we certainly did respond to the general consensus of these suggestions. Many users of the first edition felt th ...
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... An inelastic collision of an electron (e) with an atom {initially in its ground state} may leave the atom in an excited state, or even ionized, kicking out a once-bound atomic electron!  Internal {quantum} degrees of freedom can be excited in inelastic e - atom collisions. ...
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A Short Course on Topological Insulators

... simple mathematical tools as possible. We restricted our attention to one- and twodimensional band insulators. We use noninteracting lattice models of topological insulators, and build these up gradually to arrive from the simplest one-dimensional case (the Su-Schrieffer-Heeger model for polyacetyle ...
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... developed, amongst others also the plasma heating system. One heating technique is the neutral beam injection (NBI). A beam of fast deuterium atoms is injected into the fusion plasma. By heavy particle collisions the beam particles give their energy to the plasma. A NBI system consists of three majo ...
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AdS/CFT Course Notes - Johns Hopkins University

... are most interested in metals at ∼ 300K and below. At these energies metals are very well described by the effective QFT for the Fermi liquid theory. See [1] for a beautiful discussion of this theory and the Wilsonian philosophy. Research continues to understand the effective QFT that describes so-c ...
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Task A - MIT CMS Tier-2 Facility

... leadership in the analysis of the copiously produced b hadrons and searches for new phenomena at the highest energies. The latest physics results reported by CDF are based on a data sample collected up until the end of last year, which is approximately one order of magnitude larger than the Run I da ...
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Elementary particle



In particle physics, an elementary particle or fundamental particle is a particle whose substructure is unknown, thus it is unknown whether it is composed of other particles. Known elementary particles include the fundamental fermions (quarks, leptons, antiquarks, and antileptons), which generally are ""matter particles"" and ""antimatter particles"", as well as the fundamental bosons (gauge bosons and Higgs boson), which generally are ""force particles"" that mediate interactions among fermions. A particle containing two or more elementary particles is a composite particle.Everyday matter is composed of atoms, once presumed to be matter's elementary particles—atom meaning ""indivisible"" in Greek—although the atom's existence remained controversial until about 1910, as some leading physicists regarded molecules as mathematical illusions, and matter as ultimately composed of energy. Soon, subatomic constituents of the atom were identified. As the 1930s opened, the electron and the proton had been observed, along with the photon, the particle of electromagnetic radiation. At that time, the recent advent of quantum mechanics was radically altering the conception of particles, as a single particle could seemingly span a field as would a wave, a paradox still eluding satisfactory explanation.Via quantum theory, protons and neutrons were found to contain quarks—up quarks and down quarks—now considered elementary particles. And within a molecule, the electron's three degrees of freedom (charge, spin, orbital) can separate via wavefunction into three quasiparticles (holon, spinon, orbiton). Yet a free electron—which, not orbiting an atomic nucleus, lacks orbital motion—appears unsplittable and remains regarded as an elementary particle.Around 1980, an elementary particle's status as indeed elementary—an ultimate constituent of substance—was mostly discarded for a more practical outlook, embodied in particle physics' Standard Model, science's most experimentally successful theory. Many elaborations upon and theories beyond the Standard Model, including the extremely popular supersymmetry, double the number of elementary particles by hypothesizing that each known particle associates with a ""shadow"" partner far more massive, although all such superpartners remain undiscovered. Meanwhile, an elementary boson mediating gravitation—the graviton—remains hypothetical.
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