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  • Electronic Resource  (7)
  • 1985-1989  (7)
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  • Electronic Resource  (7)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Superfield actions for N=2 degenerate central charges (1985)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 26 (1985), S. 345-351 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: We construct the superfield actions for degenerate (spin-reducing) multiplets of N=2 extended supersymmetry as integrals over all superspace. This requires the integration over the two available central charges as well. We evaluate the detailed component contributions to these actions and show they are total derivatives with respect to central charge dimensions. The resulting spectrum of the theories are analyzed in four dimensions in terms of various boundary conditions in the higher dimensions and the nature of the integration domain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.526666
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On extensions of supersymmetry algebras in d=4 and 11 (1985)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 26 (1985), S. 2659-2665 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: SUSY algebras, in d=4 and 11, are analyzed, extended by the addition of both spinorial and bosonic central charge generators. It is found that only limited extensions are possible, on use of Jacobi identities. Casimirs, irreps, and spin reduction are discussed, and the problems of constructing actions for SUSY and supergravity theories as full superspace actions are considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.526734
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Structure of a nido-metalla-monocarbon carbaborane, [5-(PPh3)-9,9,9-(H)(PPh3)2-9,6-IrCB8H10] (1988)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 2079-2082 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270188009369
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  • 4
    Electronic Resource
    Electronic Resource
    Self duality in super Yang-Mills theories (1986)
    Springer
    Communications in mathematical physics 107 (1986), S. 377-389 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract The self dual condition in superspace is analysed forN=1,2,4 super Yang-Mills theories. A complete solution of all the constraints in terms of a light cone superfieldJ is presented, where the only equation thatJ satisfies is a SUSY generalization of the Yang equation. By reduction of that equation we obtain various two dimensional SUSY models. We introduce the associated linear problem in terms ofJ, whose integrability condition gives us back the super Yang equation and allows us to obtain the Kac-Moody algebra structure of the theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01220995
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  • 5
    Electronic Resource
    Electronic Resource
    Absence of divergences in type II and heterotic string multi-loop amplitudes (1987)
    Springer
    Communications in mathematical physics 112 (1987), S. 447-470 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract A detailed analysis is given of the two main types of degeneration of Riemann surface of arbitrary genus by domain variational theory. Explicit estimates for first and third Abelian functions are given. These estimates are used to analyse the possible divergences of type II or heterotic superstring multiloop amplitudes for the scattering of massless particles. They are all shown to be finite at arbitrary loop order.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01218486
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  • 6
    Electronic Resource
    Electronic Resource
    Toward finite quantum field theories (1986)
    Springer
    International journal of theoretical physics 25 (1986), S. 117-138 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The properties that make theN=4 super Yang-Mills theory free from ultraviolet divergences are (i) a universal coupling for gauge and matter interactions, (ii) anomaly-free representations, (iii) no charge renormalization, and (iv) if masses are explicitly introduced into the theory, then these are required to satisfy the mass-squared supertrace sum rule ∑s=0,1/2(−1)2s+1(2s+1)M s 2 =0. FiniteN=2 theories are found to satisfy the above criteria. The missing member in this class of field theories are finite field theories consisting ofN=1 superfields. These theories are discussed in the light of the above finiteness properties. In particular, the representations of all simple classical groups satisfying the anomaly-free and no-charge renormalization conditions for finiteN=1 field theories are discussed. A consequence of these restrictions on the allowed representations is that anN=1 finiteSU (5)-based model of strong and electroweak interactions can contain at most five conventional families of quarks and leptons, a constraint almost compatible with the one deduced from cosmological arguments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00677701
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  • 7
    Electronic Resource
    Electronic Resource
    On the cosmological effects of thermal masses in the era 1011K⩾T⩾5xl09K (1988)
    Springer
    General relativity and gravitation 20 (1988), S. 395-398 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The cosmological effects of thermal masses of particles (masses induced via interactions at nonzero temperature) as well as ordinary masses are studied. These effects are shown to be negligible for photons. For electrons, however, they modify the dependence of the universe's radiusR and the timet on temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00758963
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    Paper (German National Licenses)
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