994 resultados para Leptons (Nuclear physics)


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The nuclear matter calculations with realistic nucleon-nucleon potentials present a general scaling between the nucleon-nucleus binding energy, the corresponding saturation density, and the triton binding energy. The Thomas-Efimov three-body effect implies in correlations among low-energy few-body and many-body observables. It is also well known that, by varying the short-range repulsion, keeping the two-nucleon information (deuteron and scattering) fixed, the four-nucleon and three-nucleon binding energies lie on a very narrow band known as a Tjon line. By looking for a universal scaling function connecting the proper scales of the few-body system with those of the many-body system, we suggest that the general nucleus-nucleon scaling mechanism is a manifestation of a universal few-body effect.

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Renormalized fixed-point Hamiltonians are formulated for systems described by interactions that originally contain point-like singularities (as the Dirac-delta and/or its derivatives). They express the renormalization group invariance of quantum mechanics. The present approach for the renormalization scheme relies on a subtracted T-matrix equation.

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Includes bibliographies.

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Includes bibliographical references.

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Cover title.

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"To incorporate recent findings ... since the Italan text [Il nucleo atomico] was written, essential modifications have been introduced in the present edition."--Pref.

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Mode of access: Internet.

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Includes bibliographies.

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Includes bibliographies.

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Includes bibliographies.

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Bibliographical foot-notes. "References": p. 291-294.