Diffractive hard scattering

Diffraction is an old subject which has received much interest in recent years due to the advent of diffractive hard scattering. We discuss some theoretical models and experimental results that have shown new striking effects, e.g. rapidity gaps in jet and W production and in deep inelastic scattering. Many aspects can be described through the exchange of a pomeron with a parton content, but the pomeron concept is nevertheless problematic. New ideas, e.g. based on soft colour interactions, have been introduced to resolve these problems and provide a unified description of diffractive and non-diffractive events. This is part of the general unsolved problem of non-perturbative QCD and confinement. (orig.)Available from TIB Hannover: RA 2999(99-009) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Veraenderungen von Determinanten der Verkehrsmittelwahl in staedtischen Ballungsgebieten unter Beruecksichtigung der Auswirkungen sich aendernder Verkehrsangebotsstruktur und steigender Primaerenergiepreise Textband. Tabellen. Abbildungen. Anlagen

TIB: AC 8225+(Anl1)-(Anl3) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

KM3NeT/ARCA sensitivity and discovery potential for neutrino point-like sources

KM3NeT is a large research infrastructure with a network of deep-sea neutrino telescopes in the abyss of the Mediterranean Sea. Of these, the KM3NeT/ARCA detector, installed in the KM3NeT-It node of the network, is optimised for studying high-energy neutrinos of cosmic origin. Sensitivities to galactic sources such as the supernova remnant RXJ1713.7-3946 and the pulsar wind nebula Vela X are presented as well as sensitivities to a generic point source with an E−2 spectrum which represents an approximation for the spectrum of extragalactic candidate neutrino sources

Properties of HERA events from DIS on pions in the proton

Recently the concept of the pion cloud in the nucleon turned out to be successful in understanding the Gottfried sum rule violation observed by the new muon collaboration and the Drell-Yan asymmetry measured in NA51 at CERN. We propose a further possibility to test this concept at HERA through the analysis of the structure of deep inelastic scattering (DIS) events induced by pion-exchange. Momentum and energy distributions of outgoing nucleons as well as rapidity and multiplicity distributions are investigated using Monte Carlo simulations. Most observables cannot distinguish this process from ordinary DIS, but in the energy distribution of final neutrons we find a significantly different prediction from the pion cloud model. Forward neutron calorimeters will be essential to test the concept of pions in the nucleon. (orig.)36 refs.Available from TIB Hannover: RA 2999(96-073) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c

Adolph C, Alekseev MG, Alexakhin VY, et al. D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c. Eur.Phys.J. C. 2012;72(12): 2253.The production of D* and D mesons in inelastic scattering of 160 GeV/c muonsoff a ^6LiD target has been investigated with the COMPASS spectrometer at CERNfor 0.003 (GeV/c)^2 0.6