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  • 1
    Online Resource
    Online Resource
    Properties of a family of n reggeized gluon states in multicolour QCD (2001)
    Hamburg : DESY
    Details Availability
    Type of Medium: Online Resource
    Pages: Online Ressource, 11 p. = 178 KB, text and images , graph
    Edition: [Elektronische Ressource]
    Series Statement: DESY / Deutsches Elektronen-Synchrotron 00-077
    URL: https://edocs.tib.eu/files/e01fn01/331321289.pdf
    URL: https://edocs.tib.eu/files/e01fn01/331321289l.pdf
    Language: English
    Note: nIndex. - Differences between the printed and electronic version of the document are possible , Also available as printed version , Systemvoraussetzungen: Acrobat Reader.
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  • 2
    Electronic Resource
    Electronic Resource
    An analytical short- and long-term memory model of presynaptic plasticity (1992)
    Springer
    Biological cybernetics 67 (1992), S. 335-345 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract A mathematical model, called the Learning Gate Model (LGM), that describes phenomena responsible for biological synaptic plasticity, is presented. The functionality of the model are mainly based on the work of Kandel and colleagues on the most elementary forms of learning observed in the Aplysia Californica marine mollusc. In particular, emphasis is placed on the double temporal dynamics of synaptic plasticity and the temporal specificity of classical conditioning. By properly modeling the effect of the binding of Ca++ ions to the serotonin-sensitive adenylate cyclase enzyme, it is shown how a positively accelerated learning curve can be obtained for sensitization and classical conditioning. Phenomena of spontaneous recovery and second-order conditioning are reproduced through simulations. Mathematical analyses of the temporal trace of conditioned stimulus and of the Short-Term Memory steady state are also given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02414889
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    QCD corrections to electroweak vector boson scattering at small scattering angles (2003)
    Springer
    The European physical journal 30 (2003), S. 345-357 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We investigate the role of a certain class of QCD corrections to electroweak vector boson scattering at small scattering angles and large energies. These are present since, from the perturbative analysis, the vector bosons may dissociate into quark-antiquark pairs giving rise to color dipoles interacting through gluon exchanges. After the computation of the vector boson impact factors, we present expressions for the lowest order QCD scattering amplitude and for the leading logarithmic BFKL amplitude. Particularly we discuss numerical results for the process $\gamma\gamma\to ZZ$ . The QCD corrections to the cross section resulting from the interference with the electroweak ones are estimated and compared with the leading pure electroweak part. Corrections resulting from the leading log BFKL amplitude are of the order of a few percent already at the 0.5-1 TeV energy range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2003-01281-6
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  • 4
    Electronic Resource
    Electronic Resource
    The process $\gamma(^*) + p \to \eta_c + X$ : a test for the perturbative QCD odderon (2004)
    Springer
    The European physical journal 33 (2004), S. 511-521 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The rates of inclusive photo- and electroproduction of the $\eta_c$ meson: $\gamma(^*) + p \to \eta_c + X$ are calculated in the triple Regge region, integrated over the diffractive mass X. For the Regge exchanges we use the hard pomeron and odderon, both being calculated in the framework of perturbative QCD. The integrated cross section depends upon the coupling of the BFKL pomeron to two C = -1 odderons, and it is found to be of the order of 60 pb for photoproduction and 1.5 pb at Q 2 = 25 GeV2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2004-01589-7
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  • 5
    Electronic Resource
    Electronic Resource
    Pomeron vertices in perturbative QCD in diffractive scattering (2005)
    Springer
    The European physical journal 40 (2005), S. 419-433 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We analyze the momentum space triple pomeron vertex in perturbative QCD. In addition to the standard form of this vertex which is used in the context of total cross sections at high energies and in the QCD reggeon field theory, there exists an alternative form which has to be used in the study of high-mass diffraction. We review and analyze the relation between these two versions. We discuss some implications for the BK equation. In the second part of our paper we extend this analysis to the pomeron-odderon-odderon vertex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2005-02152-x
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