18,882 research outputs found
NNLO Time-like Splitting Functions in QCD
We review the status of the calculation of the time-like splitting functions
for the evolution of fragmentation functions to the next-to-next-to-leading
order in perturbative QCD. By employing relations between space-like and
time-like deep-inelastic processes, all quark-quark and the gluon-gluon
time-like splitting functions have been obtained to three loops. The
corresponding quantities for the quark-gluon and gluon-quark splitting at this
order are presently still unknown except for their second Mellin moments.Comment: 4 pages LaTeX, proceedings of the DIS 2008 Workshop, 7-11 April 2008,
Londo
Proposal for a High Energy Nuclear Database
We propose to develop a high-energy heavy-ion experimental database and make
it accessible to the scientific community through an on-line interface. This
database will be searchable and cross-indexed with relevant publications,
including published detector descriptions. Since this database will be a
community resource, it requires the high-energy nuclear physics community's
financial and manpower support. This database should eventually contain all
published data from Bevalac, AGS and SPS to RHIC and LHC energies,
proton-proton to nucleus-nucleus collisions as well as other relevant systems,
and all measured observables. Such a database would have tremendous scientific
payoff as it makes systematic studies easier and allows simpler benchmarking of
theoretical models to a broad range of old and new experiments. Furthermore,
there is a growing need for compilations of high-energy nuclear data for
applications including stockpile stewardship, technology development for
inertial confinement fusion and target and source development for upcoming
facilities such as the Next Linear Collider. To enhance the utility of this
database, we propose periodically performing evaluations of the data and
summarizing the results in topical reviews.Comment: 8 pages, 3 figures. Proceedings of the 21st Winter Workshop on
Nuclear Dynamics, Breckenridge, Colorado, February 5--12, 200
A High Energy Nuclear Database Proposal
We propose to develop a high-energy heavy-ion experimental database and make
it accessible to the scientific community through an on-line interace. This
database will be searchable and cross-indexed with relevant publications,
including published detector descriptions. Since this database will be a
community resource, it requires the high-energy nuclear physics community's
financial and manpower support. This database should eventually contain all
published data from the Bevalac, AGS and SPS to RHIC and LHC energies,
proton-proton to nucleus-nucleus collisions as well as other relevant systems
and all measured observables. Such a database would have tremendous scientific
payoff as it makes systematic studies easier and allows simpler benchmarking of
theoretical models to a broad range of old and new experiments. Furthermore,
there is a growing need for compilations of high-energy nuclear data for
applications including stockpile stewardship, technology development for
intertial confinement fusion and target and source development for upcoming
facilities such as the Next Linear Collider. To enhance the utility of this
database, we propose periodically performing evaluations of the data and
summarizing the results in topical reviews.Comment: 4 pages, poster proceedings from Quark Matter 200
Suited for spacewalking: A teacher's guide with activities
This publication is an activity guide for teachers on spacesuits and spacewalking. It uses the intensive interest many children have in space exploration as a launching point for hands-on-opportunities. The guide begins with brief discussions of the space environment, the history of space walking, the Space Shuttle spacesuit, and working in space. These are followed by a series of activities that enable children to explore the space environment as well as the science and technology behind the functions of spacesuits. The activities are not rated for specific grade levels because they can be adapted for students of many ages. The guide concludes with a brief glossary as well as references and resources
Labor Rights in the Generalized System of Preferences: A 20-Year Review
[Excerpt]In the fall of 1982, a small group of labor, religious, and human rights activists began charting a new course for human rights and workers\u27 rights in American trade policy. The principles of these labor rights advocates were straightforward:
1. No country should attract investment or gain an edge in international trade by violating workers\u27 rights;
2. No company operating in global trade should gain a competitive edge by violating workers\u27 rights; and,
3. Workers have a right to demand protection for labor rights in the international trade system, and to have laws to accomplish it.
The coalition that took shape 20 years ago made a labor rights amendment to the Generalized System of Preferences (GSP), the chief policy vehicle in U.S. law to promote these principles. This article reviews 20 years\u27 experience with the GSP labor rights clause
Leading large-x logarithms of the quark-gluon contributions to inclusive Higgs-boson and lepton-pair production
We present all-order expressions for the leading double-logarithmic threshold
contributions to the quark-gluon coefficient functions for inclusive
Higgs-boson production in the heavy top-quark limit and for Drell-Yan
lepton-pair production. These results have been derived using the structure of
the unfactorized cross sections in dimensional regularization and the large-x
resummation of the gluon-quark and quark-gluon splitting functions. The
resummed coefficient functions, which are identical up to colour factor
replacements, are similar to their counterparts in deep-inelastic scattering
but slightly more complicated.Comment: 8 pages, LaTeX, 1 figure (.eps). DESY address until 31 August 201
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