منابع مشابه
Nuclear matter with off-shell propagation
Symmetric nuclear matter is studied within the conserving, self-consistent T -matrix approximation. This approach involves off-shell propagation of nucleons in the ladder diagrams. The binding energy receives contributions from the background part of the spectral function, away form the quasiparticle peak. The Fermi energy at the saturation point fulfills the Hugenholz-Van Hove relation. In com...
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The n-th moments of the nuclear structure function FA 2 (x,Q 2) are analyzed using the off-shell kinematics appropriate to describe deep inelastic electron-nucleus scattering within the impulse approximation. It is shown that off-shell effects are sensitive to the form of both the nuclear spectral function and the nucleon structure function FN 2 (x,Q 2), and can be as large as ∼ 10% at Q2 ∼ 2 (...
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The compressibility of nuclear matter has received significant attention in the last decade and a variety of approaches have been employed to extract this fundamental property of matter. Recently, significant differences have emerged between the results of relativistic and non-relativistic calculations of breathing mode giant monopole resonance (GMR). This is due to a lack of understanding of t...
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We show that it is possible to distinguish between different off-shell completions of supergravity at the on-shell level. We focus on the comparison of the “new minimal” formulation of off-shell four-dimensional N = 1 supergravity with the “old minimal” formulation. We show that there are 3manifolds which admit supersymmetric compactifications in the new-minimal formulation but which do not adm...
متن کاملOff-shell String Physics *
Recent advances in non-critical string theory allow a unique continuation, preserving con-formal invariance, of critical Polyakov string amplitudes to off-shell momenta. These continuations possess unusual, apparently stringy, characteristics, which are unlikely to be reproduced in a string field theory. Thus our results may be an indication that some fundamentally new formulation, other than s...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2002
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2002-10045-5