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Browsing by Issue Date
Now showing items 41-60 of 6389
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(SISSA Library, 1982)I propose a method to relate perturbative to non perturbative QCD parameters using the available e+ e- data. The method reproduces "standard" results, but needs a rather large strange quark "mass" 11 H 250MeV assuming ...
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(Società Italiana di Fisica, 1982)We study the curvature dependence of the quartic self-coupling constant in a λØ 4 theory in the background of e static closed Einstein universe. Contrary of what happens in flat space-time at finite temperature we find ...
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(SISSA Library, 1982)It is proposed that the dark matter near the sun associated with the Oort limit be identified as belonging to a flattened rotating system of massive neutrinos or photinos. Further out this system may become the previously ...
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(SISSA Library, 1982)The next-to-leading--logarithmic corrections to the helicity cross- sections for the Drell-Yan process are calculated. While it is well-known that these corrections are large, it is shown here that when considering the ...
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(SISSA Library, 1982)We estimated that the ratio a/m between the specific angular momentum "a" and the total mass "m" (both the geometrized units) of the cores of massive main sequence stars exceeds the same ratio of neutron stars of about ...
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(SISSA Library, 1982)
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(SISSA Library, 1982)Some topological aspects of interacting Kalb-Ramond fields are discussed, using for a geometrical interpretation iterated loop spaces; the analogy is stressed with the U(1)-valued non linear sigma model coupled to U(l) ...
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(Società Italiana di Fisica, 1982)We recover the general form of the one—loop effective potential for a λØ4, theory, non—minimally coupled to a constant curvature background geometry, in the low energy limit, i.e. for small curvature. Renormalization is ...
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(SISSA Library, 1982)
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(SISSA Library, 1982)Concepts borrowed from the effective mass theory of impurity states in semiconductors are shown to be useful in the theory of surface states. Explicit application is made to surface phonons. For a bcc (100) surface, in ...
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(SISSA Library, 1982)
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(SISSA Library, 1982)A space-charge limited polar-gap model is considered for the pulsar magnetosphere. In the present model the density of current flowing from the polar cap area is greater than in previous cases, and is taken as an observational ...
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(SISSA Library, 1982)A scalar-pseudoscalar four-Fermi quantum field model in four- dimensional space-time is considered. Introducing the scalar and pseudo- scalar collective bosons we express the path-integral representation for the generating ...
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(SISSA Library, 1982)The superfield formulation of D = 4 superEuclidean QFT is given, derived from the transformation properties of quaternionic Euclidean superspace. The correspondence with Poincare' supersymmetry is explained. The description ...
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(SISSA Library, 1982)We discuss the role of the recently discovered π' and K’ resonances in the renormalization of the K13 decay form factor.
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(Società Italiana di Fisica, 1982)A rigorous treatment of the problem of Cerenkov radiation from fast moving electric and magnetic charges is presented. This is based on the rigorous solution of Maxwell's equations in a general dispersive medium possessing ...
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(SISSA Library, 1982)The understanding that has been gained of accelerated vacua sheds new light on the classic issue of the self-force suffered by a uniformly accelerated charge. Moreover the fact that, as a result of quantum theory, the ...
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(SISSA Library, 1982)
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(SISSA Library, 1982)Mean field results for small clusters of spins are combined with renormalization group ideas to give a new approximate scheme for the study of disordered systems. Dilute, random fields and random bonds off Ising systems ...
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(SISSA Library, 1982)
Now showing items 41-60 of 6389
