178 research outputs found
The Process " Pbar P -> E- E+ " with Polarized Initial Particles and Proton Form Factors in Time-Like Region
The discussion on the asymptotical behaviour of the form factors in the
space-like and time-like regions have been corrected and clarified. Fig.3 has
been replaced by an improved analysis of the data.Comment: DFTT 13/93. LaTeX file, 11 pages + 3 figures (included
Aspetti della cristianizzazione degli agglomerati secondari.
Indagine sui caratteri specifici della topografia cristiana nei centri minori (vici, stationes, porti, castella, ecc.)dell'Italia antica
A remark on the tau-neutrino mass limit
We point out that the usual experimental upper bounds on the ``tau-neutrino
mass'' do not apply if neutrino mixing is considered. The suppression of the
population of the tau decay spectrum near the end-point, caused by mixing, may
be compensated by an enhancement due to a resonant mechanism of hadronization.
It is necessary therefore to analyse the whole spectrum to infer some limit to
the ``tau-neutrino mass". We argue that, consequently, neutrino mixing evades
the objection to interpret KARMEN anomaly as a heavy sequential neutrino.Comment: 9 pages, RevTeX 3.0 file, 1 figure contained in a postscript file
appended in the end of the documen
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Religious transformations in the Middle Ages: towards a new archaeological agenda
The study of religious change in Europe between the collapse of the Roman Empire and the Reformation forms one of the cornerstones of medieval archaeology but has been riven by period, denominational and geographical divisions. This paper lays the groundwork for a fundamental rethink of archaeological approaches to medieval religions, by adopting a holistic framework that places Christian, pagan, Islamic and Jewish case studies of religious transformation in a long-term, comparative perspective. Focused around the analytical themes of ‘hybridity and resilience’ and ‘tempo and trajectories’, our approach shifts attention away from the singularities of national narratives of religious conversion towards a deeper understanding of how religious beliefs, practices and identity were renegotiated by medieval people in their daily lives
a multi scalar approach to long term dynamics spatial relations and economic networks of roman secondary settlements in italy and the ombrone valley system southern tuscany towards a model
In Roman landscapes, the particular sites defined as secondary settlements (also known as vici/villages, minor centres, agglomerations secondaires and/or stationes/mansiones) have played an 'intermediary' role between the cities and other rural structures (villae/farms), linked to medium- and long-distance economic and commercial trajectories. The aim of this paper is to apply a multi-scalar approach to model their long-term spatial relationships and connectivity with the Mediterranean exchange network. On the macro-scale, we have analysed a sample of 219 reviewed sites to understand the diachronic trends and spatial dynamics of attraction/proximity to significant elements of the landscape such as towns, roads, rivers and coastline. The Ombrone Valley (Tuscany, Italy) represents a micro-scale case study of a complex system, in which the imported pottery (amphorae, African Red Slip ware, ingobbiata di rosso) found in the vicus/mansio of Santa Cristina in Caio, the Roman villa of La Befa and the town of Siena (Saena Iulia) provided diagnostic 'macroeconomic' perspectives. The results show how the secondary settlements occupied a nodal position in the Roman landscape in terms of resilience (long period of occupation until the Early Middle Ages) and spatial organization with a close relationship to natural and anthropic infrastructures and trade functions linked to Mediterranean routes
Theoretical interpretation of multiple production of particles in high energy collisions
Remarks on some symmetry problems in cosmology and in the theory of particles and fields
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