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  • 1
    Electronic Resource
    Electronic Resource
    A peptide antibiotic from human skin (1997)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 387 (1997), S. 861-861 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To avoid opportunistic infections, plants and animals have developed antimicrobial peptides in their epithelia that can form pores in the cytoplasmic membrane of microorganisms. After contact with microorganisms, vertebrate skin, trachea and tongue epithelia are rich sources of peptide ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/387861a0
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical analysis of tunneling paths in constant field SU(2) lattice gauge theory (1992)
    Springer
    The European physical journal 53 (1992), S. 277-286 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present results of a computer analysis of euclidean solutions of the SU(2) lattice gauge theory Hamiltonian for constant fields. The accumulation of tunneling solutions in a certain region of phase space is investigated because it is expected to give a strong contribution to the path integral. Our analysis shows, that an infinite set of classical trajectories with finite action exists, and describes how they cluster.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01597565
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of hot spots inside the proton at HERA and LEP/LHC (1992)
    Springer
    The European physical journal 54 (1992), S. 635-641 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper we discuss the measurement of regions in the proton where the density of small-x partons is large, called “hot spots”, by means of an associated jet analysis. An analytical estimate of the cross section is presented and the jet kinematics is discussed in the HERA and LEP-LHC frame. A Monte Carlo estimate shows that the number of jets produced in deep inelastic scattering events at HERA, suitable for this analysis, amounts to a few 1000 jcts for a data sample with an integrated luminosity of about 10 pb−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01559492
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  • 4
    Electronic Resource
    Electronic Resource
    A numerical study of the small-x behavior of deep inelastic structure functions in QCD (1991)
    Springer
    The European physical journal 50 (1991), S. 91-101 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A numerical study of the Gribov-Levin-Ryskin equation for deep inelastic structure functions in the small-x regions is performed. In the first part we study a simplified version which illustrates general features of the solution and also allows to investigate certain analytic properties. In the second part we formulate a more realistic version of the GLR equation and compute its solution, for different input distributions and for different values of the strength of the nonlinearity in the GLR equation. One of the conclusions is that, provided the input distribution is not too flat and the nonlinear coupling is not too small, deviations from the standard evolution may be visible at HERA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01558562
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  • 5
    Electronic Resource
    Electronic Resource
    Unitarity corrections to the Lipatov Pomeron and the four-gluon operator in deep inelastic scattering in QCD (1993)
    Springer
    The European physical journal 60 (1993), S. 471-488 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Starting from a four-gluon partial-wave amplitude which provides the first unitarity corrections to the Lipatov Pomeron we study the deep inelastic limit. We find mixing between the four-gluon operator and a twistfour piece of the two-gluon operator. We calculate the diagonal elements of the matrix of the anomalous dimensions and the coefficient function of the singular part (nearn=1) of the four-gluon operator. Several disagreements between our results and the Gribov-Levin-Ryskin evolution equation are found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560045
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  • 6
    Electronic Resource
    Electronic Resource
    Diffractive $\eta_c$ photo-and electroproduction with the perturbative QCD Odderon (2001)
    Springer
    The European physical journal 20 (2001), S. 323-331 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Using a set of new odderon states, we calculate their contribution to the diffractive $\eta_c$ photo- and electroproduction process. Compared to previous simple 3-gluon exchange calculations we find an enhancement of about one order of magnitude in the cross section. The t-dependence of the cross section exhibits a dip structure in the small t region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100520100676
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  • 7
    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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  • 8
    Electronic Resource
    Electronic Resource
    Caustics in a simpleSU(2) lattice gauge theory model (1987)
    Springer
    The European physical journal 33 (1987), S. 583-603 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper describes the beginning of an attempt to study the weak coupling limit of lattice gauge theories, using the Hamiltonian formulation and the semiclassical approximation. The topics are caustics and the behavior of the ground state wave function in the vicinity of caustics. For two very simpleSU(2) models (one plaquette, two plaquettes) we demonstrate the existence of caustics, determine their locations and study the peaking behavior of the ground state wave function on them in the limitg 2→0.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01548272
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  • 9
    Electronic Resource
    Electronic Resource
    Path integral on a group manifold and the lattice gauge theory Hamiltonian (1988)
    Springer
    The European physical journal 38 (1988), S. 483-493 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For a quantum mechanical system living on the manifold of a compact simple Lie group we present explicit formulae for the quantum corrections, both in the Hamiltonian and, for the most common time discretization, in the path integral. As a special application of this rather general procedure, we compare, for lattice gauge theories, the path integral corresponding to the Kogut-Susskind Hamiltonian and the Wilson action. The latter is shown to correspond to a very special but elegant way of discretizing the time variable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01584400
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  • 10
    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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