9,423 research outputs found
What Does the CMS Measurement of W-polarization Tell Us about the Underlying Theory of the Coupling of W-Bosons to Matter?
We discuss results of the CMS collaboration on the sensitivity of the LHC to
boson polarisation in the process using the variable directly connected to
angle of the outgoing lepton in the rest frame of the decaying . We have
shown that for a given , interference between different polarizations of
the -boson is not negligible, and needs to be taken into account when
considering the differential cross-section with respect to . The
variable suggested by CMS collaboration is highly suitable variable to study
LHC sensitivity to couplings of -boson to fermions. We note that
the experimental sensitivity to W-boson polarization which is much higher than
that to () parameter space can be turned around and used to identify
deviations from the Standard Model as a signal for new physics at the LHC.Comment: 11 pages, 8 figures. Updated to match the final version published in
JHEP with updated figures and polished tex
The Alt-Right and Global Information Warfare
The Alt-Right is a neo-fascist white supremacist movement that is involved in
violent extremism and shows signs of engagement in extensive disinformation
campaigns. Using social media data mining, this study develops a deeper
understanding of such targeted disinformation campaigns and the ways they
spread. It also adds to the available literature on the endogenous and
exogenous influences within the US far right, as well as motivating factors
that drive disinformation campaigns, such as geopolitical strategy. This study
is to be taken as a preliminary analysis to indicate future methods and
follow-on research that will help develop an integrated approach to
understanding the strategies and associations of the modern fascist movement.Comment: Presented and published through IEEE 2019 Big Data Conferenc
First-principles study of ferroelectricity and pressure-induced phase transitions in HgTiO
Ground-state structure is found and pressure-induced phase transitions up to
210 kbar are studied in mercury titanate from first principles within the
density functional theory. It is established that the structure
experimentally observed in HgTiO is metastable at ambient pressure. With
increasing the hydrostatic pressure, the ground-state structure changes
following the sequence. It is shown that the
appearance of ferroelectricity in HgTiO at is associated with an
unstable phonon mode. Optical and elastic properties of different phases of
mercury titanate are calculated. The quasiparticle band gap calculated in the
\emph{GW} approximation ( eV) agrees with experimental data better
than the value obtained in the LDA approximation (1.49 eV). Analysis of the
thermodynamic stability explains why the synthesis of mercury titanate is
possible only at high pressures.Comment: 8 pages, 4 figures, 5 tables; to appear in Phase Transition
Aggregate Measures of Income and Output in Canada and the United States: Implications for Productivity and Living Standards
The objectives of this article are to clarify definitions and to produce estimates of the eight aggregate measures of income and product (gross domestic product, gross domestic income, gross national product, gross national income, net domestic product, net domestic income, net national product and net national income) for Canada and the United States over the 1980-2008 period. The article also discusses the implications of the eight measures for productivity and living standards analysis. It concludes that GDP and NDP are the most appropriate measures of output for productivity analysis, while NNI is the most appropriate measure of income for the analysis of living standards because it captures the impact on real income of terms of trade changes, net income received from abroad, and the sustainability of the capital stock.gross domestic product, gross domestic income, gross national product, gross national income, net domestic product, net domestic income,net national product, net national income, productivity, living standards
Symmetry, Compact Closure and Dagger Compactness for Categories of Convex Operational Models
In the categorical approach to the foundations of quantum theory, one begins
with a symmetric monoidal category, the objects of which represent physical
systems, and the morphisms of which represent physical processes. Usually, this
category is taken to be at least compact closed, and more often, dagger
compact, enforcing a certain self-duality, whereby preparation processes
(roughly, states) are inter-convertible with processes of registration
(roughly, measurement outcomes). This is in contrast to the more concrete
"operational" approach, in which the states and measurement outcomes associated
with a physical system are represented in terms of what we here call a "convex
operational model": a certain dual pair of ordered linear spaces -- generally,
{\em not} isomorphic to one another. On the other hand, state spaces for which
there is such an isomorphism, which we term {\em weakly self-dual}, play an
important role in reconstructions of various quantum-information theoretic
protocols, including teleportation and ensemble steering. In this paper, we
characterize compact closure of symmetric monoidal categories of convex
operational models in two ways: as a statement about the existence of
teleportation protocols, and as the principle that every process allowed by
that theory can be realized as an instance of a remote evaluation protocol ---
hence, as a form of classical probabilistic conditioning. In a large class of
cases, which includes both the classical and quantum cases, the relevant
compact closed categories are degenerate, in the weak sense that every object
is its own dual. We characterize the dagger-compactness of such a category
(with respect to the natural adjoint) in terms of the existence, for each
system, of a {\em symmetric} bipartite state, the associated conditioning map
of which is an isomorphism
A cross-sectional analysis of undergraduate medical student attitudes towards interprofessional education
No abstract available
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