1,015 research outputs found
Fuchsian groups of the second kind and representations carried by the limit set
We compute the cohomology of a Fuchsian group of the second kind with
coefficients in the hyperfunction vectors of the principal series
representations of supported on the limit set.Comment: 22 pages, LATE
Three-flavor chiral effective model with four baryonic multiplets within the mirror assignment
We study three-flavor octet baryons by using the so-called extended Linear
Sigma Model (eLSM). Within a quark-diquark picture, the requirement of a mirror
assignment naturally leads to the consideration of four spin-
baryon multiplets. A reduction of the Lagrangian to the two-flavor case leaves
four doublets of nucleonic states which mix to form the experimentally observed
states , , and . We determine the
parameters of the nucleonic part of the Lagrangian from a fit to masses and
decay properties of the aforementioned states. By tracing their masses when
chiral symmetry is restored, we conclude that the pairs , and
, form chiral partners.Comment: Based on the presentation given at FAIRNESS 2016, Workshop for young
scientists with research interests focused on physics at FAIR, 14-19 February
2016 Garmisch-Partenkirchen, Germany. 5 page
Perspectives on Multi-Level Dynamics
As Physics did in previous centuries, there is currently a common dream of
extracting generic laws of nature in economics, sociology, neuroscience, by
focalising the description of phenomena to a minimal set of variables and
parameters, linked together by causal equations of evolution whose structure
may reveal hidden principles. This requires a huge reduction of dimensionality
(number of degrees of freedom) and a change in the level of description. Beyond
the mere necessity of developing accurate techniques affording this reduction,
there is the question of the correspondence between the initial system and the
reduced one. In this paper, we offer a perspective towards a common framework
for discussing and understanding multi-level systems exhibiting structures at
various spatial and temporal levels. We propose a common foundation and
illustrate it with examples from different fields. We also point out the
difficulties in constructing such a general setting and its limitations
A varactor tuned low-cost 24 GHz harmonic VCO
We present a low-cost 24 GHz VCO that is based on a microstrip design combined with discrete packaged devices. The output frequency is generated by a harmonic oscillator. The tunabilty was reached using a varactor diode. Two versions of the VCO were built, one has a wide tuning range of 1.1 GHz and the other one has a high output power of 3.7 dBm
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