18,985 research outputs found
Learning from the Dead: How Burial Practices in Roman Britain Reflect Changes in Belief and Society
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
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
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
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
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 Ca, Ge, and
Se. We work in one major shell for the first isotope, in the
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 , but also the triaxiality angle 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
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