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AbstractAbstract

[en] A conformal technique is given for the generation of exact solutions for the spherically symmetric vacuum field in the general Bergmann-Wagoner-Nordtvedt scalar-tensory theory with vanishing cosmological constant. In particular the solution is discussed for Schwinger's theory and for models with phisup(n) coupling or with curvature coupling. It appears that all theories with vanishing cosmological term lead to the presence of naked singularities. (author)

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General Relativity and Gravitation; ISSN 0001-7701; ; v. 14(1); p. 17-25

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[en] A solution which can be considered as a classical model of a charged particle possessing both magnetic moment and nonzero density of a magnetic charge has been obtained. It is noted that interaction with torsion of space-time can disturb not only gauge invariance of the electromagnetic field but also to restore it in the initially noninvariant theory

[ru]

Original Title

Ehlektromegnitnoe pole v prostranstve s krucheniem

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For English translation see the journal Soviet Physics Journal (USA).

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Izvestiya Vysshikh Uchebnykh Zavedenij, Fizika; ISSN 0021-3411; ; v. 25(2); p. 30-33

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[en] It is shown that the 'non-conservative' gravitational theories of the type considered by Rastall, Smalley and Malin do have conservation laws and are formally equivalent to general relativity. The supposed 'difference' between these theories and general relativity is shown to lie entirely in the question of whether the stress-energy tensor of matter fields is conserved in special relativity (flat space-time). (author)

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Journal of Physics. A, Mathematical and General; ISSN 0305-4470; ; v. 15(6); p. 1827-1830

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[en] It is shown that for finite number of aligned particles interacting via the potential 1/γ

^{2}there exists Baecklund transformation. This transformation is expressed using Riccatti equation for associated S turm-Liouville problem. (author)Original Title

Sur les systemes a plusieurs particules avec potentiel an 1/r

^{2}, l'equation de Riccatti et les systemes completement integrables relies a l'equation de SchroedingerPrimary Subject

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Journal Article

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Lettere al Nuovo Cimento; ISSN 0024-1318; ; v. 23(14); p. 503-508

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AbstractAbstract

[en] Scattering of a spinless projectile from a system of two (over-lapping or non-overlapping) local potentials is studied in the first-order eikonal expansion. Corrections to the Glauber formula are found to come mainly from the non-eikonal propagation in the 'direct' double scattering, and not from multiple scattering ('reflections'). A comparison is made between the exact (to the leading order) and two approximate results: (I) based on the theory of scattering from non-overlapping potentials, and (II) neglecting the reflection terms and adopting the local 'Born-like' off-shell extrapolation of the two-body amplitudes. The second approximation is found to be more accurate and technically simpler in calculation of multiple scattering from many-body systems. (orig.)

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Nuclear Physics. A; ISSN 0375-9474; ; v. 386(3); p. 525-551

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CORRECTIONS, DEUTERIUM TARGET, DEUTERONS, DIFFERENTIAL CROSS SECTIONS, EIKONAL APPROXIMATION, EXTRAPOLATION, GEV RANGE 01-10, GLAUBER THEORY, MULTIPLE SCATTERING, NUCLEON-NUCLEON INTERACTIONS, PION REACTIONS, PION-NUCLEON INTERACTIONS, PIONS, POTENTIAL SCATTERING, SCATTERING AMPLITUDES, SERIES EXPANSION, THREE-BODY PROBLEM, TWO-BODY PROBLEM

AMPLITUDES, BARYON-BARYON INTERACTIONS, BOSONS, CHARGED PARTICLES, CROSS SECTIONS, ELASTIC SCATTERING, ELEMENTARY PARTICLES, ENERGY RANGE, GEV RANGE, HADRON REACTIONS, HADRON-HADRON INTERACTIONS, HADRONS, INTERACTIONS, MANY-BODY PROBLEM, MESON REACTIONS, MESON-BARYON INTERACTIONS, MESON-NUCLEON INTERACTIONS, MESONS, NUCLEAR REACTIONS, NUMERICAL SOLUTION, PARTICLE INTERACTIONS, PSEUDOSCALAR MESONS, SCATTERING, TARGETS

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AbstractAbstract

[en] Starting from a method of series analysis, usually adopted in statistical mechanics, and from some results of potential theory, an approximation procedure for the calculation of the high-energy two-body elastic-scattering amplitude is proposed. The input is the perturbative expansion of the relevant S-matrix element in powers of a renormalized coupling constant. The method reproduces the lower perturbative terms and gives an extrapolation of the higher ones, which is appropriate in the high-energy region. In the framework of the phi

^{4}model, the total cross-section, the ratio of the real to the imaginary part of the elastic two-body scattering amplitude and the elastic differential cross-section are calculated. The results show some general features of the two-body high-energy hadronic collisions. (author)Primary Subject

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Nuovo Cimento. A; ISSN 0369-3546; ; v. 41(2); p. 250-258

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[en] Factorization of inclusive reactions in the target fragmentation region is investigated. An examination is made of all the available data for reactions in which, for a given final-state particle c, there are at least three channels with ab c-bar exotic, and factorization is observed to hold to a very good approximation. (author)

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44 refs.

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Nuovo Cimento. A; ISSN 0369-3546; ; v. 41(2); p. 331-350

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[en] It is proposed that all forms of interaction arise from elementary ones between Weyl-Majorana fields. Weak interactions due to the high masses of the intermediate bosons are practically identical to the elementary ones. Strong and electromagnetic interactions arise at larger distances, where dynamics determines both masses and symmetry. In the frame of these ideas, Pati-Salam and Fritzsch-Minkowski type of unified models are constructed by starting from eight Weyl-Majorana fields. Fractional charges for quarks, integer charges for leptons and regularization of QED arise naturally from the model. Unobserved transitions (μ→e+γ,p→leptons) may be ascribed to properties of the elementary fields (handedness) rather than to very high W masses. (author)

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17 refs.

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Nuovo Cimento. A; ISSN 0369-3546; ; v. 43(2); p. 193-211

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[en] A new method for spin lattice models is developed. An algorithm for the construction of the continuous-integral representation for the partition function is formulated. A method for finding the critical point of the two-dimensional models is developed. (author)

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Nuovo Cimento. A; ISSN 0369-3546; ; v. 47(1); p. 115-138

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[en] The ''charge-field'' approach to electrodynamics, in the microcosm, is based on the paradigm that ''charges'' and their associated electromagnetic ''fields'' are permanently connected in ''charge-field'' functional structures, with physical processes being described by the interactions between various ''charge-field'' entities. It has been shown that, at the classical and semi-classical level, this approach is completely finite and self-consistent and requires no ''infinite'' subtraction programs for the evaluation of observable physical quantities. In a hole-theoretic ''second-quantized'' formulation of this theory, presented here, quantizing the ''charges'' (associated with Dirac anticommutation relations for electron-positron operators) automatically quantizes the electromagnetic ''charge-field'' operators. This generates ''photon'' states as a secondary dynamical manifestation of electron-positron quantization. In this paper, a possible approach to the second quantization of ''charge-fields'', in the Heisenberg picture, which might lead to a better formulation of quantum electrodynamics, is discussed. (author)

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33 refs.

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Nuovo Cim., B; ISSN 0369-3554; ; v. 48(1); p. 15-34

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