18,985 research outputs found

    Learning from the Dead: How Burial Practices in Roman Britain Reflect Changes in Belief and Society

    Full text link
    This paper begins by examining the burial traditions of the Iron age Britons and Classical Romans to see how these practices reflect their societal values and belief systems. The funerary methods of both the Britons and Romans are then analyzed following the Roman occupation of Britain in 43 AD to see how these practices changed once the two groups came into contact with each other. The findings show that rather than Romanization, there is a hybridization of burial practices which incorporated and reflect both Roman and British beliefs and values

    Hadronic photon interactions at high energies

    Full text link
    A simple phenomenological introduction to the physics of multi-pomeron exchange amplitudes in connection with the Abramovski-Gribov-Kancheli (AGK) cutting rules is given. The AGK cutting rules are applied to obtain qualitative and quantitative predictions on multiparticle production at high energies. On this basis, particle production in hadron-hadron scattering, photoproduction, and in particular the transition to deep-inelastic scattering is discussed.Comment: LaTeX, 6 pages, 6 ps-figs, sprocl.sty, talk given by R. Engel at "XXVI International Symposium on Multiparticle Dynamics" held in Faro, Portugal, September 199

    Spatial Confinement Causes Lifetime Enhancement and Expansion of Vortex Rings with Positive Filament Tension

    Get PDF
    We study the impact of spatial confinement on the dynamics of three-dimensional excitation vortices with circular filaments. In a chemically active medium we observe a decreased contraction of such scroll rings and even expanding ones, despite of their positive filament tension. We propose a kinematical model which takes into account the interaction of the scroll ring with a confining Neumann boundary. The model reproduces all experimentally observed regimes of ring evolution, and correctly predicts the results obtained by numerical simulations of the underlying reaction-diffusion equations

    Model-independent assessment of current direct searches for spin-dependent dark matter

    Full text link
    I evaluate the current results of spin-dependent weakly interacting massive particle (WIMP) searches within a model-independent framework, showing the most restrictive limits to date derive from the combination of xenon and sodium iodide experiments. The extension of this analysis to the case of positive signal experiments is elaborated.Comment: 4 pages, 4 figures, revised and accepted for publication on Phys. Rev. Let

    Neutrinoless double-beta decay matrix elements in large shell-model spaces with the generator-coordinate method

    Full text link
    We use the generator-coordinate method with realistic shell-model interactions to closely approximate full shell-model calculations of the matrix elements for the neutrinoless double-beta decay of 48^{48}Ca, 76^{76}Ge, and 82^{82}Se. We work in one major shell for the first isotope, in the f5/2pg9/2f_{5/2}pg_{9/2} space for the second and third, and finally in two major shells for all three. Our coordinates include not only the usual axial deformation parameter β\beta, but also the triaxiality angle γ\gamma and neutron-proton pairing amplitudes. In the smaller model spaces our matrix elements agree well with those of full shell-model diagonalization, suggesting that our Hamiltonian-based GCM captures most of the important valence-space correlations. In two major shells, where exact diagonalization is not currently possible, our matrix elements are only slightly different from those in a single shell.Comment: 8 pages, 7 figure
    corecore