191 research outputs found
Leading particle effect, inelasticity and the connection between average multiplicities in {\bf } and {\bf } processes
The Regge-Mueller formalism is used to describe the inclusive spectrum of the
proton in collisions. From such a description the energy dependences of
both average inelasticity and leading proton multiplicity are calculated. These
quantities are then used to establish the connection between the average
charged particle multiplicities measured in {\bf } and {\bf } processes. The description obtained for the leading proton cross section
implies that Feynman scaling is strongly violated only at the extreme values of
, that is at the central region () and at the diffraction
region (), while it is approximately observed in the
intermediate region of the spectrum.Comment: 20 pages, 10 figures, to be published in Physical Review
A Discussion on Supersymmetric Cosmic Strings with Gauge-Field Mixing
In this paper, following a stream of investigation on supersymmetric gauge
theories with cosmic string solutions, we contemplate the possibility of
building up a D-and-F term cosmic string by means of a gauge-field mixing in
connection with a U(1) x U(1)'-symmetry. The spontaneous break of both gauge
symmetry and supersymmetry are thoroughly analysed and the fermion zero-modes
are worked out. The role of the gauge-field mixing parameter is elucidated in
connection with the string configuration that comes out. As an application of
the model presented here, we propose the possibility that the supersimetric
cosmic string yield production of fermionic charge carriers that may eject, at
their late stages, particles that subsequently decay to produce cosmic rays of
ultra-high energy. In our work, it turns out that massive supersymmetric
fermionic partners may be produced for a susy breaking scale in the range
10^{11} to 10^{13} GeV, which is compatible with the phenomenology of a
gravitino mass at the TeV scale. We also determine the range of the gauge-field
mixing parameter, \alpha, in connection with the mass scales of the present
model.Comment: 7 pages, no figures, ReVTex format, to appear in New Journal of
Physic
Diffractive Dissociation In The Interacting Gluon Model
We have extended the Interacting Gluon Model (IGM) to calculate diffractive
mass spectra generated in hadronic collisions. We show that it is possible to
treat both diffractive and non-diffractive events on the same footing, in terms
of gluon-gluon collisions. A systematic analysis of available data is
performed. The energy dependence of diffractive mass spectra is addressed. They
show a moderate narrowing at increasing energies. Predictions for LHC energies
are presented.Comment: 12 pages, latex, 14 figures (PostScript Files included); accepted for
publication in Phys. Rev. D (Feb.97
Adverse Event Investigation and Risk Assessment
AbstractThis chapter describes a comprehensive approach to adverse event investigation and risk assessment, as well as the characteristics of an integrated system for patient safety and clinical risk management. Drawing on evidence from other industries and healthcare organizations across the globe, the author's report how such a system can be developed with the active involvement of policy-makers, healthcare managers, health professionals, and patients. Human factors and ergonomics provide the theoretical framework in which the guiding principles, methods, and tools are selected and applied to identify, analyze, and prevent risks related to unsafe care in any healthcare setting
The role of a firm's absorptive capacity and the technology transfer process in clusters: How effective are technology centres in low-tech clusters?
This paper analyses how the internal resources of small- and medium-sized enterprises determine access (learning processes) to technology centres (TCs) or industrial research institutes (innovation infrastructure) in traditional low-tech clusters. These interactions basically represent traded (market-based) transactions, which constitute important sources of knowledge in clusters. The paper addresses the role of TCs in low-tech clusters, and uses semi-structured interviews with 80 firms in a manufacturing cluster. The results point out that producer–user interactions are the most frequent; thus, the higher the sector knowledge-intensive base, the more likely the utilization of the available research infrastructure becomes. Conversely, the sectors with less knowledge-intensive structures, i.e. less absorptive capacity (AC), present weak linkages to TCs, as they frequently prefer to interact with suppliers, who act as transceivers of knowledge. Therefore, not all the firms in a cluster can fully exploit the available research infrastructure, and their AC moderates this engagement. In addition, the existence of TCs is not sufficient since the active role of a firm's search strategies to undertake interactions and conduct openness to available sources of knowledge is also needed. The study has implications for policymakers and academia
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