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13 papers · 1 filter
The Spin Gap in the Context of the Boson-Fermion Model for High Superconductivity
J. Ranninger, J. M. Robin
The issue of the spin gap in the magnetic susceptibility in high T_c superconductors is discussed within a scenario of a mixture of localized tightly bound electron pair…
The Linear Sigma-Model in the 1/N-Expansion via Dynamical Boson Mappings and Applications to -Scattering
Z. Aouissat, P. Schuck, J. Wambach
We present a non-perturbative method for the study of the O(N+1)-version of the linear sigma-model. Using boson-mapping techniques, in close analogy to those well-known for fermion…
Resistive transport in a mesoscopic proximity superconductor
P. Charlat, H. Courtois, Ph. Gandit +3
We review transport measurements in a normal metal (N) in contact with one or two superconducting (S) islands. From the experiment, we distinguish the Josephson coupling, the mesos…
Pion-pair formation and the pion dispersion relation in a hot pion gas
T. Alm, G. Chanfray, P. Schuck +1
The possibility of pion--pair formation in a hot pion gas, based on the bosonic gap equation, is pointed out and discussed in detail. The critical temperature for condensation of p…
Tetraquarks with colour-blind forces in chiral quark models
S. Pepin, Fl. Stancu, M. Genovese +1
We discuss the stability of multiquark systems within the recent model of Glozman et al. where the chromomagnetic hyperfine interaction is replaced by pseudoscalar-meson exchange c…
Nucleosynthesis of light elements inside thermally pulsing AGB stars I: the case of intermediate-mass stars
Manuel Forestini, Corinne Charbonnel
The structural and nucleosynthetic evolution of 3, 4, 5, 6 and \mass{7} stars with two metallicities ( and 0.02) has been computed in detail, from the early pre-main seq…