Medium effects in direct reactions
نویسندگان
چکیده
منابع مشابه
Direct reactions in/for astrophysics
Precise nuclear reaction rates are needed for a detailed description of the production of elements in primordial nucleosynthesis and during the hydrostatic burning of stars to constrain the astrophysical models. The relevant reactions are extremely difficult to measure directly in the laboratory at the small astrophysical energies. In recent years direct reactions methods have been developed an...
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Hadrons, embedded inside nuclei, obviously change some of their properties. They acquire complex selfenergies with the real parts reflecting the binding (or nonbinding) properties and the imaginary parts reflecting the interactions and possibly their changes inside the medium. Particles that are produced through resonances or – at high energies – through strings become physical, on-shell partic...
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We review some simple mechanisms of breakup in nuclear reactions. We mention the spectator breakup, which is described in the post-form DWBA. The relation to other formulations is also indicated. An especially important mechanism is Coulomb dissociation. It is a distinct advantage that the perturbation due to the electric field of the nucleus is exactly known. Therefore firm conclusions can be ...
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We consider the role of rescattering of secondary kaons on the dilepton branching ratio of the φ meson. In-medium mass modifications and broadening of kaons and φ mesons are taken into account. We find in the framework of a Bjorken scenario for the time evolution of the expanding fireball that the φ yield from dimuons is moderately or at least only slightly enhanced compared to that from kaon-a...
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We have developed direct asymmetric cross-aldol reactions that can be performed in water without addition of organic solvents. A bifunctional catalyst with a long hydrophobic alkyl chain efficiently catalyzed the reactions and afforded the desired aldol products in excellent yield with high enantiomeric excess, even when only an equal molar ratio of the donor and acceptor was used. These result...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2013
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/420/1/012074