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  • Digitale Medien  (4)
  • 2000-2004  (3)
  • 1995-1999  (1)
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  • Digitale Medien  (4)
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  • 2000-2004  (3)
  • 1995-1999  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Perturbative aspects of q-deformed dynamics (2001)
    Springer
    The European physical journal 20 (2001), S. 393-396 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. Within the framework of the q-deformed Heisenberg algebra a dynamical equation of q-deformed quantum mechanics is discussed. The perturbative aspects of the q-deformed Schrödinger equation are analyzed. General representations of the additional momentum-dependent interaction originating from the q-deformed effects are presented in two approaches. As examples, such additional interactions related to the harmonic-oscillator potential and the Morse potential are demonstrated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100520100649
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  • 2
    Digitale Medien
    Digitale Medien
    Model-independent constraints on contact interactions from LEP2 data analysis (2003)
    Springer
    The European physical journal 29 (2003), S. 103-109 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. We derive model-independent constraints on four-fermion contact interaction-type dynamics from the published preliminary LEP2 experimental data on e + e - annihilation into $\mu^+\mu^-$ and $\tau^+\tau^-$ pairs, measured at different energies between 130 and 207 GeV. The basic observables are chosen to be the total cross section and the forward-backward asymmetry, and the analysis realistically takes into account data uncertainties and correlations among measurements at the various energies. The combination of data from different energy points plays an important role in the determination of regions allowed for the contact interaction coupling constants. In contrast to the more common one-parameter analyses, we only obtain constraints on pairs of parameters rather than limits on individual ones.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epjc/s2003-01206-5
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  • 3
    Digitale Medien
    Digitale Medien
    Graviton-induced bremsstrahlung at e + e - colliders (2004)
    Springer
    The European physical journal 35 (2004), S. 555-566 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. We consider graviton-induced bremsstrahlung at future e + e - colliders in both the ADD and RS models, with emphasis on the photon perpendicular momentum and angular distribution. The photon spectrum is shown to be harder than in the standard model, and there is an enhancement for photons making large angles with respect to the beam. In the ADD scenario, the excess at large photon perpendicular momenta should be measurable for values of the cut-off up to about twice times the CM energy. In the RS scenario, radiative return to graviton resonances below the CM energy can lead to large enhancements of the cross section.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epjc/s2004-01858-5
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  • 4
    Digitale Medien
    Digitale Medien
    Higgs production: CP studies in $e^-e^-$ collisions (1999)
    Springer
    The European physical journal 9 (1999), S. 413-424 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. We review the production of scalar Higgs-like particles in high-energy electron–electron collisions, via the fusion of electroweak gauge bosons. The emphasis is on how to distinguish a CP-even from a CP-odd Higgs particle. Among the more significant differences, we find that in the CP-odd case, the Higgs spectrum is much harder, and the dependence of the total cross section on the product of the polarizations of the two beams much stronger, than in the CP-even case. We also briefly discuss parity violation, and the production of charged Higgs bosons.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100520050034
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