122,967 research outputs found
The Jackiw-Pi model and its symmetries
The non-Abelian gauge model proposed by Jackiw and Pi, which generates an
even-parity mass term in three space-time dimensions, is revisited in this
letter. All the symmetries of the model are collected and established by means
of BRS invariance and Slavnov-Taylor identity. The path for the perturbatively
quantization of the Jackiw-Pi model, through the algebraic method of
renormalization, is presented.Comment: 5 page
The Jackiw-Pi model: classical theory
The massive even-parity non-Abelian gauge model in three space-time
dimensions proposed by Jackiw and Pi is studied at the tree-level. The
propagators are computed and the spectrum consistency is analyzed, besides, the
symmetries of the model are collected and established through BRS invariance
and Slavnov-Taylor identity. In the Landau gauge, thanks to the antighost
equations and the Slavnov-Taylor identity, two rigid symmetries are identified
by means of Ward identities. It is presented here a promising path for
perturbatively quantization of the Jackiw-Pi model and a hint concerning its
possible quantum scale invariance is also pointed out.Comment: In honor of the 70th birthday of Prof. Olivier Piguet. 11 page
Analysis Framework for Translation of Maritime Legal Documents
Maritime activity around the globe currently generates a great amount of translation work, especially from English into other languages. This paper focuses on the analysis of the translation process in maritime legal and administrative documents. The study first establishes which maritime documents are most often translated and a tool is then developed to analyse such documents in detail, based on the concept of textual genre. Such analysis would help translators to better understand these highly specialised documents and thus contribute towards improving translation of the same
Reconstruction of the Extended Gauge Structure from Observables at Future Colliders
The discovery of a new neutral gauge boson with a mass in the TeV region
would allow for determination of gauge couplings of the to ordinary quarks
and leptons in a model independent way. We show that these couplings in turn
would allow us to determine the nature of the extended gauge structure. As a
prime example we study the group. In this case two discrete constraints
on experimentally determined couplings have to be satisfied. If so, the
couplings would then uniquely determine the two parameters, and
, which fully specify the nature of the within . If the
is part of the gauge structure, then for TeV and
could be determined to around at the future colliders. The NLC
provides a unique determination of the two constraints as well as of and , though with slightly larger error bars than at the LHC. On
the other hand, since the LHC primarily determines three out of four normalized
couplings, it provides weaker constraints for the underlying gauge structure.Comment: 14 pages LaTeX using RevTeX and psfig.sty. TeX source and 3 PS
figures, tarred, compressed and uuencoded; also available via anonymous ftp
to ftp://dept.physics.upenn.edu/pub/Cvetic/UPR-636-T
Light neutrino propagation in matter without heavy neutrino decoupling
We review the propagation of light neutrinos in matter assuming that their
mixing with heavy neutrinos is close to present experimental limits. The
phenomenological implications of the non-unitarity of the light neutrino mixing
matrix for neutrino oscillations are discussed. In particular we show that the
resonance effect in neutrino propagation in matter persists, but for slightly
modified values of the parameters and with the maximum reduced by a small
amount proportional to the mixing between light and heavy neutrinos squared.Comment: 11 pages, 1 figure, contribution to Stefan Pokorski 60th birthda
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